Hamilton Barnes

Security Proxy Engineer - 6 Month Contract - Inside IR35 - Hybrid in London Contract Type: Initial 6 month contract (Inside IR35) Rate: £500 per day Inside IR35 Location: Hybrid in London Role Overview: We are looking for a Senior Security Proxy Engineer to join on a 6-month hybrid contract based in London (3 days on-site). The role is responsible for the implementation, operation, and optimisation of enterprise Proxy infrastructure that enables secure access to internal and third-party services, supporting regulatory compliance, security controls, and user productivity at scale. Key Responsibilities: Implement, configure, and maintain enterprise Proxy and secure web gateway services, managing policies for web access control, traffic inspection, TLS decryption, and egress IP enforcement Monitor Proxy service health, availability, and performance, performing root-cause analysis for incidents and participating in incident response and post-incident reviews Support compliance activities by maintaining logging, retention, and inspection settings, and providing Proxy logs and traffic analysis for security investigations and audits Implement and maintain identity-aware Proxy policies integrating with identity providers and authentication systems, supporting onboarding of new applications and SaaS services Maintain operational documentation, configuration standards, and troubleshooting runbooks, collaborating with network, endpoint, IAM, cloud, and security teams What You Will Ideally Bring: 6+ years hands-on experience supporting enterprise Proxy or secure web gateway platforms, with strong knowledge of HTTP/HTTPS, TLS, certificates, and encryption/decryption processes Experience implementing and managing Proxy policies for traffic inspection, filtering, and outbound control in production environments Solid networking fundamentals - TCP/IP, DNS, routing, and load balancing - with proven ability to troubleshoot complex Proxy-related access and performance issues Experience with identity-centric access models, SSO, and device or user-based policy enforcement within Proxy environments Familiarity with cloud-delivered or hybrid Proxy environments, with exposure to automation or Scripting for Proxy configuration and monitoring

PowerOn Reliance SCADA Engineer - Wokingham - 6 months - Inside IR35 We are hiring experienced PowerOn Reliance SCADA Engineers to support a major utilities programme, delivering critical system validation and integration across transmission SCADA environments. This role will focus on testing, configuration, and end-to-end validation of GE PowerOn Reliance (PoR) systems, ensuring successful deployment across complex operational landscapes. This is a delivery-focused role requiring strong hands-on expertise in SCADA systems, integration, and testing within live or near-live power environments. Key Responsibilities Design and execute testing and validation across GE PowerOn Reliance (PoR) SCADA and EMS systems Perform functional, non-functional, and integration testing across multiple environments Deliver end-to-end SCADA system validation aligned to business and operational requirements Create and execute detailed test plans, scenarios, and test cases Configure and support PoR components including Application Servers, Database Servers, FEP (Front End Processors), and Historian systems Collaborate with system integrators, vendors, and internal delivery teams to ensure alignment with requirements Support integration of SCADA systems with enterprise applications and external interfaces Act as a subject matter expert across SCADA testing and validation phases Work within Agile teams to support delivery, defect management, and reporting using tools such as JIRA/XRAY Ensure adherence to defined test strategies, standards, and processes Must-Have Experience Strong hands-on experience with GE PowerOn Reliance (PoR) SCADA Experience working within Transmission/Utilities SCADA environments Proven background in SCADA testing including FAT, SIT, UAT, and integration testing Experience in system validation, defect management, and test execution Experience configuring and supporting SCADA/EMS environments Strong knowledge of industry protocols including IEC 101, IEC 104, and IEC 61850 Experience integrating SCADA systems with enterprise platforms and external interfaces Strong understanding of SCADA architecture, data flows, and system dependencies Experience working within Agile environments using tools such as JIRA What's on offer? Day Rate: £425 per day (Inside IR35) Length: 6 months (Extension Potential) Start: ASAP Location: Wokingham (5 Days Onsite)

Azure Logic App Specialist - 6 months - Remote - Outside IR35 We are seeking a dedicated Azure Logic App Specialist for a 6-month contract to work directly with a key customer. This role involves designing and developing a series of playbooks, providing expert-level support and development of Azure Logic Apps in a fully remote capacity. Key Responsibilities: Design, develop, and maintain Azure Logic Apps workflows and playbooks. Utilize connectors effectively to integrate various services within Logic Apps. Implement error handling, monitoring, and best practices to ensure resilient cloud integrations. Act as the primary subject matter expert (SME) on Azure Logic Apps for the customer. Collaborate closely with the customer to deliver tailored Logic App solutions. Provide continuous support and troubleshooting for Logic App implementations. What You Will Ideally Bring: Deep hands-on experience with Azure Logic Apps and related connectors. Strong understanding of workflow design, error handling, and monitoring within Logic Apps. Proven ability to deliver resilient and scalable cloud integration solutions. Experience acting as a subject matter expert and trusted advisor on Azure Logic Apps. Excellent communication skills and ability to work closely with customers remotely. Strong problem-solving and analytical abilities. Contract Details: Duration: 6 months Location: Remote Day Rate: Up to £500 per day (Outside IR35) Azure Logic App Specialist - 6 months - Remote - Outside IR35

Infrastructure Solution Architect - Outside IR35 - DV Cleared Overview My close client is looking for a DV Cleared Solution Architect with strong technical and security expertise to design and deliver solutions across Windows, Linux, and application environments. You'll be responsible for producing low-level designs, guiding delivery teams, and ensuring security standards are met. Contract Details: Duration: 6 months (Long term program) Day Rate: Competitive - Outside IR35 Location: Farnborough/Bristol Start Date: ASAP Responsibilities Design and document secure solutions (HLD/LLD). Provide expertise in application development and solution integration. Lead design and deployment of PAM, antivirus, and endpoint security. Support stakeholders with technical guidance and security compliance. Leverage knowledge of Active Director and SAND in architectural designs. Requirements Active DV Clearance (mandatory). Proven experience as a Solution Architect in secure environments. Strong knowledge of Windows & Linux platforms. Background in application development. Hands-on experience with PAM, antivirus, endpoint protection. Experience producing low-level design documentation. Knowledge of Active Director and SAND technologies. Infrastructure Solution Architect - Outside IR35 - DV Cleared

Palo Alto Engineer - 3-Month Contract - Central London - Outside IR35 We are looking for a Palo Alto Engineer to join a global organisation on an initial 3-month contract, working 2-3 days per week onsite in Central London. You'll play a key role in high-impact implementation projects, leading the migration from Legacy Cisco and Palo Alto platforms to the latest next-generation technologies. Key Skills: Strong background in Cisco and Juniper Routing and Switching (R&S) Expert knowledge of Network Security technologies - Cisco ASA, FirePOWER and Palo Alto (Panorama) Experience in configuring Switches and VLANs Excellent communication skills with the ability to work closely with customers Contract Details: Duration: 3 months Location: Hybrid (2-3 days per week Central London) Day Rate: Up to £350 per day (Outside IR35) Palo Alto Engineer - 3-Month Contract - Central London - Outside IR35

Network Consulting Engineer - 6 months - MUST BE BASED IN SCOTLAND Overview My client is looking for an experienced Network Consultant to take the lead on end-to-end project delivery, provide expert technical support, and act as a trusted advisor to clients. This is a hands-on role that combines design, implementation, troubleshooting, and mentoring, with responsibility for driving successful project outcomes and resolving complex technical challenges. Contract Details: Duration: 6 months (Long term program) Day Rate: Outside IR35 Location: Glasgow/Aberdeen/Edinburgh - Hybrid Start Date: ASAP Responsibilities Lead projects through the full life cycle, from design to implementation. Own and resolve technical issues, ensuring root cause analysis and long-term fixes. Deliver engineering services, including low-level design, implementation, and consultancy. Serve as an escalation point for advanced network and security incidents. Troubleshoot and resolve complex network and security problems quickly and effectively Requirements Strong experience in network and security engineering roles. Proven Cisco experience Proven ability to design, implement, and support complex solutions. Skilled in troubleshooting and resolving advanced technical issues. Background in delivering consultancy and project-based services. Excellent communication skills, with the ability to mentor and support others. Network Consulting Engineer - 6 months - MUST BE BASED IN SCOTLAND

Corporate Real Estate Solutions Architect - 6 Month Contract - London (1 Day P/W) - Inside IR35 Hamilton Barnes I'm currently representing a large financial firm who are looking for a Corporate Real Estate Solutions Architect on an initial 6 month contract with a view to extension. Key Requirements & Responsibilities: Collaborate with stakeholders to understand business strategy and create architecture roadmaps. Strong technical background across IT domains: infrastructure and application architecture, systems integration, workflow, data management, etc. Proficient in Enterprise Architecture, linking it to business strategy and roadmaps. Familiarity with Cloud solutions (AWS, Google GCP, Azure) and strategic partners. Direct experience translating strategies into roadmaps with business stakeholders. Domain knowledge in Corporate Real Estate Technology (IWMS). Exposure to data and business architecture. Contract Details: Duration - 6 months Location - London/Sheffield (1 Day Per Week Onsite) Determination - Inside IR35 Start Date - ASAP Please reach out if you are currently looking for your next contract role! If you are currently looking for a new role that matches this description, then please email me on (see below) with an updated version of your CV.

DevSecOps Engineer | 6 months | UK Remote One of my consultancy clients are looking for a DevSecOps Engineer for an initial 6 month contract with one of their financial customers. Key Skills/Responsibilities: Expertise in providing product support and implement bug fixes provided by the product vendor. Experience with System Monitoring Tools and Experience with Scripting Building and setting up new Development Tools and Provision secure Infrastructure Good Experience with DevSecOps and exposure to tools like Aquasec and Nexus Iq Any Hashicorp Vault, Aquasec, SonarQube is highly desired Google Cloud Experience Contract Details: Start Date: ASAP Duration: 6 months Location: Main Office is London (Remote working) Pay Rate: £550 per day (Inside IR35)