Mimecast Limited

Mimecast Limited is seeking a Cloud Operations Engineer to maintain their robust hybrid-cloud infrastructure. This role focuses on enhancing platform reliability, managing Kubernetes and AWS, and building Infrastructure-as-Code. You will collaborate with skilled teams and contribute to the security, performance, and availability of services. Join a company that values innovation and offers career growth with competitive compensation, including benefits. Engage in a collaborative culture that promotes continuous learning and development.

Cloud Operations EngineerApplylocations: Great Britain - Londontime type: Full timeposted on: Posted 28 Days Agojob requisition id: R6296 Cloud Operations Engineer Overview At Mimecast, we operate at scale-protecting billions of emails daily across a global hybrid-cloud infrastructure. If you're passionate about reliability, automation, and solving complex challenges in mission-critical environments, this is the opportunity for you. Why Join Us "This is a hands-on role in a team responsible for ensuring Mimecast's Hybrid Cloud infrastructure remains secure, resilient, and scalable. You'll work with cutting-edge technologies like Kubernetes, AWS, and Infrastructure-as-Code, all while collaborating with a supportive and talented team. If you're excited about making a real impact and growing your career in our Cloud Platform Team, I'd love to hear from you." - Hiring Manager, Cloud Platform AI-First Engineering at MimecastMimecast is an AI-First engineering organization. Our teams actively leverage AI-powered development tools across all facets of engineering, from code development to testing, documentation, and operations. We're looking for leaders who don't just use AI tools but champion their adoption and establish new ways of working.Our AI leadership extends beyond how we build to what we build. Our Mihra AI agent delivers 7x faster threat response for customers, and we're recognized as "Agents of Change" in Human Risk Management. Engineers here work at the intersection of cutting-edge AI tooling and AI-powered security products that protect organizations worldwide. What You'll Do: Ensure platform reliability : Configure and maintain infrastructure to ensure optimal performance, security, and availability. Manage containerization platforms : Operate and improve Kubernetes and AWS EKS to support Mimecast's microservices architecture. Automate infrastructure : Build reusable Infrastructure-as-Code (IaC) and automation to standardize infrastructure provisioning and deployment processes. Troubleshoot and resolve issues : Identify and resolve infrastructure issues across Linux and Kubernetes systems in a hybrid-cloud environment, minimizing downtime. Enhance security : Strengthen the security posture of infrastructure configurations, aligning with the latest cybersecurity standards. Improve processes : Collaborate with the team to continuously refine operational processes and documentation. Maintain observability tools : Manage and operate monitoring and observability tools like Graphite, Prometheus, Grafana, Elastic, Nagios, and LogScale. Support engineering teams : Provide exceptional support to internal Product and Engineering teams, meeting their requirements for the Mimecast Cloud Platform. Participate in on-call rotations : Support the team by participating in on-call rotations and performing out-of-hours maintenance as necessary. What You'll Bring: Technical expertise : Experience in roles such as Site Reliability Engineer (SRE), Platform Engineer, Cloud Operations, or Sys Admin. Kubernetes proficiency : Strong hands-on experience with Kubernetes (k8s) and containerization in production environments. Linux expertise : Proficiency in maintaining and troubleshooting Linux operating systems and distributed systems at scale. Infrastructure knowledge : Solid understanding of core infrastructure services such as DNS, Identity Management, load balancers, and web servers. Networking basics : Foundational knowledge of computer networking. IaC and scripting : Experience with Infrastructure-as-Code tools like Terraform/CloudFormation and configuration management tools like Puppet. Proficiency in at least one programming or scripting language. Proactive problem-solver : A proactive attitude with a willingness to take on new challenges, deliver results, and learn new technologies quickly. Collaboration skills : Outstanding communication and social skills, with the ability to connect with others and problem-solve effectively. Why This Role: Global impact : Join a cybersecurity company operating at genuine global scale, protecting organizations and their people. Engineering excellence : Be part of a Cloud Platform organization that values automation, reliability, and doing things properly. Competitive rewards : Enjoy competitive compensation as part of a broader total rewards package, including benefits and wellbeing programs. Career growth : Access opportunities to develop expertise in hybrid-cloud infrastructure, Kubernetes, and automation, with clear paths to senior engineering roles. Collaborative culture : Work alongside experienced engineers and leaders who invest in your development. Career Growth Opportunities Develop deep expertise in hybrid-cloud infrastructure, Kubernetes, and automation. Build strong Infrastructure-as-Code and automation skills in a production environment that demands them. Grow into senior engineering or team lead roles within Cloud Platform. Work alongside experienced engineers and leaders who are committed to your development. Manager's Working Style & Team's Purpose The Site Reliability Engineering team exists to ensure the reliability and resiliency of Mimecast's Hybrid Cloud infrastructure. The team's purpose is to deliver a platform that is secure, performant, and scalable, enabling Product and Engineering teams to innovate faster and deliver more value to customers. Day-to-day, you'll work in a collaborative environment, tackling complex challenges and contributing to the continuous improvement of Mimecast's infrastructure. The expectation is hands-on technical credibility combined with a proactive approach to problem-solving and teamwork.Join our Cloud Platform team to accelerate your career journey, working with cutting-edge technologies and contributing to projects that have real customer impact. You will be immersed in a dynamic environment that recognizes and celebrates your achievements.Mimecast offers formal and on the job learning opportunities, maintains a comprehensive benefits package that helps our employees and their family members to sustain a healthy lifestyle, and importantly - working in cross functional teams to build your knowledge! Our Hybrid Model: We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to the office at least two days per week, because working together in person: Fosters a culture of collaboration, communication, performance and learning. Drives innovation and creativity within and between teams. Introduces employees to priorities outside of their immediate realm. Ensures important interpersonal relationships and connections with one another and our community! The base salary range for this position is £64,000 £96,000 plus benefits. This range represents the minimum and maximum new hire compensation for this role. The position may also be eligible for incentive plans and additional benefits, in accordance with company policy and local regulations. Our salary ranges are determined by role, level, and location with individual compensation also dependent on factors such as qualifications, experience, and skills. Final offers will reflect these considerations and may vary accordingly. Belonging at Mimecast Cybersecurity is a community effort. That's why we're committed to building an inclusive, diverse community that celebrates and welcomes everyone - unless they're a cybercriminal, of course.We're proud to be an Equal Opportunity and Affirmative Action Employer, and we'd encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won't affect your application. Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.

Field CISO EMEAApplylocations: Great Britain - Londontime type: Full timeposted on: Posted Todayjob requisition id: R6409Field CISO EMEA About Mimecast Mimecast is a global cybersecurity leader redefining how organisations secure human risk. Our AI-powered, API-enabled Human Risk Management platform is purpose-built to protect organisations from the full spectrum of cyber threats - integrating cutting-edge technology with human-centric pathways to deliver visibility, strategic insight, and decisive action. More than 42,000 businesses worldwide trust Mimecast to keep ahead of an ever-evolving threat landscape.We are one of only three vendors globally to achieve Leader status in both the Gartner Magic QuadrantTM for Email Security and DCGAS. Our platform spans email security, insider risk management (Incydr), human risk awareness and training (Mimecast Engage), and the Human Risk Command Center - a single pane of glass that scores, surfaces, and enables action on human risk across an entire organisation. Most recently, we expanded Incydr into runtime data security, providing unified visibility across both human and AI agent risk.Across EMEA, Mimecast has established offices in Dubai, Johannesburg, Cape Town, Bengaluru, Melbourne, and Sydney - meaning the Field CISO is not parachuting into a region from afar, but stepping into a geography where Mimecast already has genuine presence, colleagues, and customer relationships. Through our Resilience Together corporate social responsibility programme, we also invest time, resources, and funds in underserved communities across the regions in which we operate - a signal of long-term commitment that matters in markets where vendor credibility is built over years, not quarters. About the role: We are looking for a Director-level Field CISO to join our Security function, reporting directly to the Global Field CISO. Based in London with two days per week in the office, you will serve as the primary trusted security advisor across our most strategic accounts in EMEA - a region spanning the Europe, the Middle East and Africa.This is not a pre-sales or support role. You will operate at the intersection of customer success, executive advisory, and industry thought leadership, extending the Global Field CISO's strategy into a region too diverse and commercially significant to be served from a central function. You bring your own credibility, your own relationships, and your own point of view - and you use them to make customers genuinely more secure.In practice, that means helping CISOs across EMEA navigate the human risk challenge that defines Mimecast's market: the recognition that most breaches trace back to human behaviour - negligent, compromised, or malicious - and that solving for it requires visibility across email, collaboration tools, endpoints, SaaS applications, and now AI agents. With more than 42,000 customers globally already trusting Mimecast with this problem, the Field CISO is not selling an unproven idea - they are bringing a proven platform and a community of practitioners into a region hungry for exactly this kind of advisory. You are the person who connects that story to local pain, in local language, at the executive level. Delivering a Remarkable Experience for our customers is not a tagline here - it is the standard. What You'll Do: Customer advisory & success Act as a trusted advisor to CISOs, CTOs, and board-level stakeholders at our top strategic accounts across EMEA - helping them build and mature their human risk management programmes Guide customers through insider risk strategy, Incydr deployment, AI agent risk, and enterprise risk frameworks - translating the Mimecast platform's capabilities into measurable business outcomes Support customers through audits, regulatory examinations, and compliance programmes across a fragmented regional landscape (PDPA, DIFC, POPIA, Saudi NCA, and more) Be the first call when a customer has a security problem - whether or not it directly relates to our products. Run toward the problem, not away from it Thought leadership & industry presence Represent Mimecast at major EMEA security conferences - GISEC, GITEX, Black Hat MEA, and sector-specific FSI and government events - advancing the human risk narrative in markets we must win Author whitepapers, research reports, and opinion pieces on human risk, insider threat, AI security, and the evolving threat landscape - contributing to Mimecast's State of Human Risk research programme Build and sustain a credible public profile across EMEA that extends the Global Field CISO's reach and reinforces Mimecast's position as the human risk authority in the region Commercial & revenue impact Partner with sales on security-sensitive enterprise deals - shortening sales cycles and lifting win rates through advisory credibility, particularly in regulated sectors (FSI, telco, government, critical infrastructure) Support land-and-expand motions by deepening relationships within existing accounts and surfacing opportunities to expand Mimecast platform adoption Log all advisory-linked opportunities in CRM to build the evidence base for Field CISO ROI - and to demonstrate how security advisory translates to customer outcomes Voice of the customer Feed structured customer insights back to product and engineering - surfacing gaps in human risk capabilities, Incydr controls, AI governance features, and secure-by-default configurations Advocate for reductions in customer audit and compliance toil by pushing for product changes that make evidencing conformance easier - this is Make Things Better in action Contribute to the Mimecast CISO Customer Advisory Board (CAB) and regional CISO community events, building a customer community that values Mimecast as a long-term security partner What You'll Bring: Experience & background Depth of experience in enterprise information security, with 10+ years in a leadership role - including at least 3 years as a CISO, VP of Security, or equivalent inside an enterprise. Lived operational experience is non-negotiable. Bachelor's degree in computer science, information technology, cybersecurity, or a related field (Master's preferred) - or equivalent demonstrated experience at senior security leadership level Advanced certifications: CISSP, CRISC, CISM, GCEIT, or GIAC equivalent Proven ability to engage and influence C-suite and board audiences with credibility and humility Prior exposure to multiple EMEA sub-regions with genuine cross-cultural fluency Comfortable operating as a Director-level individual contributor - highly self-directed, without requiring day-to-day management oversightJoin our Security team to accelerate your career journey, contributing to projects that have real impact. You will be immersed in a dynamic environment that recognizes and celebrates your achievements.Mimecast is on a path of steady and healthy growth as a company, investing in people like you who bring the skills and expertise to raise our technical expertise, operational maturity, and customer success to the next level. Your contributions are important! Every voice and action matters.Mimecast offers formal and on-the-job learning opportunities, maintains a comprehensive benefits package that helps our employees and their family members to sustain a healthy lifestyle, and importantly - opportunities to work with cross-functional teams to build your knowledge! Our Hybrid Model: We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to the office at least two days per week, because working together in person: Fosters a culture of collaboration, communication, performance, and learning. Drives innovation and creativity within and between teams Introduces employees to priorities outside of their immediate realm. Ensures important interpersonal relationships and connections with one another and our community! The base salary range for this position is £124,000 £186,000 plus benefits. This range represents the minimum and maximum new hire compensation for this role. The position may also be eligible for incentive plans and additional benefits, in accordance with company policy and local regulations. Our salary ranges are determined by role, level, and location with individual compensation also dependent on factors such as qualifications, experience, and skills. Final offers will reflect these considerations and may vary accordingly. Belonging at Mimecast Cybersecurity is a community effort. That's why we're committed to building an inclusive, diverse community that celebrates and welcomes everyone - unless they're a cybercriminal, of course.We're proud to be an Equal Opportunity and Affirmative Action Employer, and we'd encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won't affect your application. Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.

Mimecast Limited, based in London, seeks a Business Development Representative to drive sales efforts and help businesses understand the value of our cybersecurity solutions. This role offers a hybrid schedule and a compensation range of £40,000-£66,000, plus benefits. The ideal candidate will possess a sales-driven mindset, strong communication skills, and adaptability to succeed in a fast-paced environment. Join us and enjoy formal learning opportunities within a collaborative team.

Senior Architect - Email & Collaboration SecurityApplylocations: Great Britain - Londontime type: Full timeposted on: Posted Todayjob requisition id: R6496 Senior Solutions Architect - Email & Collaboration Security - London UK Why This Role Exists The Email & Collaboration Security (ECS) product line sits at the intersection of some of the most consequential challenges in enterprise security today: AI-augmented threats, sprawling collaboration surfaces, multi-cloud delivery complexity, and the expectation that detection and response capabilities keep pace with a threat landscape that does not wait.This architecture is not greenfield. It carries two decades of accumulated product decisions, integration contracts, and operational constraints. The right candidate understands why that history matters before proposing how to move beyond it. Reasoning about legacy shape and evolutionary trajectory simultaneously is not optional; it is the job.The successful candidate will serve as connective tissue across product management, engineering, and the broader Architecture Leadership Team - turning customer and business problems into coherent, deliverable technical direction, and owning the decisions that give ECS engineering teams a stable foundation to move fast with quality. AI-First Ways of Working Mimecast is an AI-first engineering organisation. This is not a cultural aspiration - it is an operating expectation. The person in this role is expected to use AI tools as a genuine, daily part of how they work: for design exploration and iteration, documentation, analysis, prototyping, and research synthesis.This means having a real, practised opinion on where AI tooling accelerates quality decisions and where it introduces risk. It also means designing systems that incorporate AI components thoughtfully: understanding the implications of LLM integration, agent boundaries, prompt and data-contract stability, and evaluation coverage for AI-driven features.Candidates who treat AI tooling as optional or experimental are not the right fit for this role. The expectation is fluency and daily practice, not passing familiarity. The ECS Domain ECS covers the following product and capability areas: Email threat detection and prevention Email security efficacy Collaboration security DMARC analyzer Data platform and observability Analysis and Response End user application integration Internal operations enablement What You Will Do Lead from Problem Space, Not Solution Space The role engages at the problem-framing stage, not after requirements have already hardened into tickets. This means facilitating workshops with PMs, UX, and engineers to surface real customer constraints and articulate what good looks like in business and user terms before any technical shape is proposed. Own Integration Contracts as Product Artefacts The durable interfaces - APIs, event contracts, data schemas - that connect ECS capabilities to the broader Mimecast platform are first-class artefacts owned by this role. They outlast individual features, and the coordination work that makes integrations actually land across teams and time is part of the remit. Build the Architectural Context Engineering Teams Operate Inside ADRs, service interaction patterns, NFR targets, and data contracts are not documentation - they are the substrate that lets engineering teams and AI-assisted development workflows make consistent decisions at scale. The artefacts produced in this role are clear, reasoned, and durable. Govern Without Blocking Governance is a mechanism for alignment and acceleration, not gatekeeping. Structure and discipline are introduced where they reduce risk or improve quality - and removed where ceremony adds cost without value. The role engages the Chief Architect early, pushes back constructively when platform standards do not fit the ECS context, and helps teams close decisions with conviction rather than endless review. Reason About Cost and Unit Economics Infrastructure choices are sized, cost trajectories modelled for new architecture work, and unexpected spend is flagged with a proposed remediation. The frame is cost per outcome - per protected mailbox, per remediated incident - not just monthly AWS spend. Communicate at Every Altitude A one-page decision record that lands with engineers, a solution brief that holds up under senior architecture review, a strategy narrative that resonates with product and commercial leadership - this role operates across all of those registers. Whiteboard sessions produce actual decisions, not just richer ambiguity. What You Will Bring Breadth Over Depth - and Knowing the Difference 10+ years building and operating production SaaS systems, with at least 3 years in a Solutions Architect, Principal Engineer, or equivalent role carrying product-shaping responsibility A genuinely broad architectural lens - thinking about system shape, data flows, and organisational constraints rather than reaching for the nearest deep technical rabbit hole Comfort operating across cloud-native patterns (AWS, Kafka, managed services, distributed event architectures) at high throughput - able to reason about trade-offs with confidence, without needing to be the most technically specialist person in the room Product Understanding - Not Just Technical Understanding Prior close collaboration with Product Managers and UX designers, with an understanding of jobs-to-be-done framing and a real opinion on what makes a product bet good - not just a technical bet Genuine customer orientation: asking what problem the customer has before asking how to build the feature Understanding of SaaS unit economics, the commercial implications of architectural choices, and how to reason about scale from a product perspective as well as a systems one The Right Mindset for Complex, Inherited Systems An understanding of what twenty years of software history means in a production system - no assumption of greenfield, and no treatment of legacy as only debt; it is accumulated context Structure and discipline as cognitive defaults, not imposed processes - thorough, well-reasoned artefacts, and a habit of leaving things clearer than they were found An ability to connect dots across a large picture with many moving parts, make a call, and communicate it clearly - rather than waiting for certainty that will not arrive Self-Direction and Strategic Initiative A proactive self-starter who identifies the right problems to work on without being told, and drives them to resolution Comfortable acting independently within a set of principles, while keeping the right stakeholders informed and in sync - not seeking permission, but maintaining alignment Thrives with ambiguity and treats it as a problem to be structured, not a reason to pause Learning Orientation - Not Encyclopaedic Knowledge Able to reach a solution even without all the knowledge in front of them - a problem-solver who knows how to navigate to an answer, not a mnemonic database AI tooling treated as a core capability multiplier, with a real daily practice in design work, documentation, research synthesis, and prototyping Stays ahead of where the market and the technology are going, and brings that signal back into product and architecture decisions Bonus Points Background in email security, threat detection, DLP, identity, or data platforms Familiarity with agentic AI, MCP (Model Context Protocol), or LLM application architecture Experience with eval design for AI features, product discovery practices, or data contract / data mesh approaches Exposure to M365 or GWS integration patterns, SMTP relay architecture, or cloud-native security SaaS What We Offer Impact : architecture decisions that protect millions of mailboxes and shape the technical direction of one of Mimecast's core product pillars Voice : a direct working relationship with the Chief Architect and a genuine say in technology direction - not an advisory lane Senior peers : a small, high-trust Architecture Leadership Team where everyone operates at a high level Qualifications Bachelor's degree in Computer Science, Software Engineering, or a related field - or equivalent demonstrable experience 10+ years of professional software engineering and architecture experience, with at least 3 years in a senior architecture or principal engineering role A track record of product-shaping responsibility, not just technical delivery Active, daily use of AI development tools in a professional setting - not experimentation, practice Mimecast is an equal opportunity employer committed to an inclusive and diverse workplace. The base salary range for this position is £124,000 - £186,000 base + benefits. This reflects the minimum and maximum target for new hire salaries for this position. This position may also be eligible for incentive plans and other related benefits. Our salary ranges are determined by role, level, and location. These factors and individual capabilities will also determine the individual pay offered.

Mimecast Limited is seeking a Senior Solutions Architect for Email & Collaboration Security. This role will lead architectural design within a high-trust team and engage seriously with AI tools in daily operations. The successful candidate will own integration contracts and facilitate workshops to define real problems while ensuring a strong customer focus across cross-functional teams. The position offers a base salary range of £124,000 - £186,000 plus benefits.