Senior Microsoft Infrastructure Engineer (SC or DV Cleared) - Outside IR35 Hybrid: 3 Days Onsite, in Bristol Rate: Up to £480 per day Outside IR35 Clearance: Active SC or DV Clearance Required Duration: initial 6-12 month contract Overview We're seeking an experienced Senior Microsoft Infrastructure Engineer to join a major government transformation programme delivering secure enterprise services within highly classified environments. You'll play a key role designing, deploying, and supporting core Microsoft platforms including Active Directory, Exchange, SharePoint, Windows Server, RDS, and End User Computing services across secure and air-gapped networks. Responsibilities Deploy, administer, and harden Microsoft enterprise platforms including Active Directory, Exchange Server SE, and SharePoint Server SE. Design and support secure Windows desktop, server, and virtual desktop solutions. Build and maintain Remote Desktop Services (RDS) environments. Develop and manage Group Policy, RBAC controls, security baselines, and platform hardening standards. Create and maintain Windows gold images and endpoint configurations. Operate and support business-critical services within secure, disconnected, and air-gapped environments. Troubleshoot complex infrastructure, identity, and endpoint issues. Collaborate with architecture, security, and engineering teams to deliver secure enterprise solutions. Produce High-Level Designs (HLDs), Low-Level Designs (LLDs), implementation plans, operational procedures, and support documentation. Support governance activities and Technical Design Authority (TDA) reviews. Essential Skills & Experience Strong experience administering Microsoft enterprise technologies in large-scale environments. Expertise across: Active Directory Domain Services (AD DS) Windows Server Exchange Server SharePoint Server Group Policy (GPO) Remote Desktop Services (RDS) Identity & Access Management Experience implementing security baselines, platform hardening, and privileged access controls. Proven experience working within secure, regulated, or classified environments. Strong troubleshooting, technical documentation, and stakeholder engagement skills. Technical Environment Microsoft: Active Directory, Exchange Server SE, SharePoint Server SE, Windows Server, Windows 10/11, Group Policy, RDS Security: STIGs, Security Baselines, RBAC, Identity Management, Platform Hardening Infrastructure: Virtualisation, Secure Networks, Air-Gapped Environments, Enterprise Collaboration Platforms Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
Nov 12, 2026
Contractor
Senior Microsoft Infrastructure Engineer (SC or DV Cleared) - Outside IR35 Hybrid: 3 Days Onsite, in Bristol Rate: Up to £480 per day Outside IR35 Clearance: Active SC or DV Clearance Required Duration: initial 6-12 month contract Overview We're seeking an experienced Senior Microsoft Infrastructure Engineer to join a major government transformation programme delivering secure enterprise services within highly classified environments. You'll play a key role designing, deploying, and supporting core Microsoft platforms including Active Directory, Exchange, SharePoint, Windows Server, RDS, and End User Computing services across secure and air-gapped networks. Responsibilities Deploy, administer, and harden Microsoft enterprise platforms including Active Directory, Exchange Server SE, and SharePoint Server SE. Design and support secure Windows desktop, server, and virtual desktop solutions. Build and maintain Remote Desktop Services (RDS) environments. Develop and manage Group Policy, RBAC controls, security baselines, and platform hardening standards. Create and maintain Windows gold images and endpoint configurations. Operate and support business-critical services within secure, disconnected, and air-gapped environments. Troubleshoot complex infrastructure, identity, and endpoint issues. Collaborate with architecture, security, and engineering teams to deliver secure enterprise solutions. Produce High-Level Designs (HLDs), Low-Level Designs (LLDs), implementation plans, operational procedures, and support documentation. Support governance activities and Technical Design Authority (TDA) reviews. Essential Skills & Experience Strong experience administering Microsoft enterprise technologies in large-scale environments. Expertise across: Active Directory Domain Services (AD DS) Windows Server Exchange Server SharePoint Server Group Policy (GPO) Remote Desktop Services (RDS) Identity & Access Management Experience implementing security baselines, platform hardening, and privileged access controls. Proven experience working within secure, regulated, or classified environments. Strong troubleshooting, technical documentation, and stakeholder engagement skills. Technical Environment Microsoft: Active Directory, Exchange Server SE, SharePoint Server SE, Windows Server, Windows 10/11, Group Policy, RDS Security: STIGs, Security Baselines, RBAC, Identity Management, Platform Hardening Infrastructure: Virtualisation, Secure Networks, Air-Gapped Environments, Enterprise Collaboration Platforms Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
Chief Engineer (SC Cleared or higher) - Outside IR35 Location: Hybrid (3 Days Onsite per Week) Rate: Up to £750 per day Outside IR35 Clearance: Active SC or DV Clearance Required Overview We're seeking an experienced Chief Engineer to provide technical leadership across complex government and secure-sector programmes. You'll be responsible for setting engineering standards, driving technical excellence, and ensuring solutions are secure, scalable, and aligned with delivery objectives across multiple teams. This role combines engineering leadership, architecture assurance, and hands-on technical guidance within a highly secure environment. Responsibilities Define and govern engineering standards, best practices, and technical principles across delivery teams. Drive improvements in software engineering, infrastructure, cloud, and DevOps capabilities. Provide technical assurance for architecture, solution design, and implementation activities. Mentor engineers and architects, promoting engineering excellence and continuous improvement. Identify and resolve technical delivery challenges, improving quality, consistency, and developer experience. Act as a senior escalation point for complex engineering and architectural issues. Ensure solutions comply with security, operational, and regulatory requirements. Influence technology strategy, roadmaps, and long-term engineering decisions. Essential Skills & Experience Proven experience operating as a Chief Engineer, Principal Engineer, Lead Engineer, Technical Design Authority, or similar senior technical leadership role. Strong knowledge of modern engineering practices, cloud-native architectures, and distributed systems. Experience establishing engineering standards and governance across multiple teams. Demonstrable experience delivering solutions within secure, regulated, or government environments. Strong stakeholder engagement skills with the ability to influence across engineering, architecture, security, and delivery functions. Technical Environment Cloud & Infrastructure Azure, AWS, Private Cloud, Virtualised Infrastructure Enterprise Networking, VPNs, Firewalls, Identity & Access Management Security & Compliance Secure-by-Design Principles Zero Trust Architecture ISO 27001 NIST Cyber Essentials Plus DevOps & Platform Engineering Terraform, ARM, CloudFormation Azure DevOps, GitHub Actions, GitLab, Jenkins Docker, Kubernetes CI/CD and Infrastructure as Code Software Engineering APIs and Integration Patterns Microservices Distributed Systems Event-Driven Architectures Desirable Defence, Government, National Security, or Critical National Infrastructure experience. Platform Engineering and Developer Experience exposure. Experience leading engineering transformation programmes. Previous involvement in Technical Design Authority (TDA) or Design Authority functions. Existing DV Clearance. Clearance Requirements Candidates must hold active SC Clearance and be eligible to work within secure government environments. DV-cleared candidates will be highly desirable. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
Nov 12, 2026
Contractor
Chief Engineer (SC Cleared or higher) - Outside IR35 Location: Hybrid (3 Days Onsite per Week) Rate: Up to £750 per day Outside IR35 Clearance: Active SC or DV Clearance Required Overview We're seeking an experienced Chief Engineer to provide technical leadership across complex government and secure-sector programmes. You'll be responsible for setting engineering standards, driving technical excellence, and ensuring solutions are secure, scalable, and aligned with delivery objectives across multiple teams. This role combines engineering leadership, architecture assurance, and hands-on technical guidance within a highly secure environment. Responsibilities Define and govern engineering standards, best practices, and technical principles across delivery teams. Drive improvements in software engineering, infrastructure, cloud, and DevOps capabilities. Provide technical assurance for architecture, solution design, and implementation activities. Mentor engineers and architects, promoting engineering excellence and continuous improvement. Identify and resolve technical delivery challenges, improving quality, consistency, and developer experience. Act as a senior escalation point for complex engineering and architectural issues. Ensure solutions comply with security, operational, and regulatory requirements. Influence technology strategy, roadmaps, and long-term engineering decisions. Essential Skills & Experience Proven experience operating as a Chief Engineer, Principal Engineer, Lead Engineer, Technical Design Authority, or similar senior technical leadership role. Strong knowledge of modern engineering practices, cloud-native architectures, and distributed systems. Experience establishing engineering standards and governance across multiple teams. Demonstrable experience delivering solutions within secure, regulated, or government environments. Strong stakeholder engagement skills with the ability to influence across engineering, architecture, security, and delivery functions. Technical Environment Cloud & Infrastructure Azure, AWS, Private Cloud, Virtualised Infrastructure Enterprise Networking, VPNs, Firewalls, Identity & Access Management Security & Compliance Secure-by-Design Principles Zero Trust Architecture ISO 27001 NIST Cyber Essentials Plus DevOps & Platform Engineering Terraform, ARM, CloudFormation Azure DevOps, GitHub Actions, GitLab, Jenkins Docker, Kubernetes CI/CD and Infrastructure as Code Software Engineering APIs and Integration Patterns Microservices Distributed Systems Event-Driven Architectures Desirable Defence, Government, National Security, or Critical National Infrastructure experience. Platform Engineering and Developer Experience exposure. Experience leading engineering transformation programmes. Previous involvement in Technical Design Authority (TDA) or Design Authority functions. Existing DV Clearance. Clearance Requirements Candidates must hold active SC Clearance and be eligible to work within secure government environments. DV-cleared candidates will be highly desirable. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
Job Title: SC Eligible ServiceNow Technical Lead - Warwick Location: 2 days a week onsite in Warwick Salary/Rate: £500- £545 a day Inside IR35 Start Date: End of November Job Type: Initial 12 Month Contract SC Cleared Eligible Senior Technical Lead - ServiceNow SAM Pro - 2 days onsite in Warwick Candidates applying MUST have strong hands-on experience in BAU/support activities and development activities. Company Introduction We have an exciting opportunity available with one of our leading clients, who are looking for an experienced SC Eligible Senior Technical Lead to join their team on a contract basis. This is a key technical role focused on ServiceNow SAM Pro, platform stability, technical governance and production support within a complex enterprise environment. Job Responsibilities/Objectives As a Senior Technical Lead, you will act as a technical authority and escalation point for the ServiceNow platform, with a particular focus on SAM Pro and software licensing. You will lead complex technical issues, provide design assurance and ensure high-quality delivery across UK and offshore teams. Lead technical triage and resolution of major incidents, problems and complex production defects across SAM Pro, HRSD, ITSM, IRM and SecOps. Provide hands-on SAM Pro production support, including Effective License Position (ELP) calculations, software normalisation, reconciliation, entitlements and compliance reporting. Act as technical design authority, reviewing solution designs, code, update sets and releases while enforcing ServiceNow best practices and an out-of-the-box-first approach. Lead Root Cause Analysis (RCA) and drive improvements to platform stability, performance, data quality and compliance. Provide technical leadership to offshore teams, reviewing development quality, testing evidence and deployment readiness. Support software licensing compliance across major publishers including Oracle, Microsoft, VMware, IBM and Adobe. Required Skills/Experience The ideal candidate will have the following: Experience supporting ServiceNow SAM Pro in enterprise production environments. Strong hands-on expertise in ELP calculations, software normalisation, discovery reconciliation, entitlements, publisher packs and software compliance. Proven experience leading P1/P2 incidents, technical triage and Root Cause Analysis. Strong ServiceNow technical design, governance and platform architecture experience. Experience supporting ServiceNow HRSD and ITSM. Experience providing technical leadership to offshore development/support teams. Eligible for SC Clearance and willing to go through the process of getting SC Clearance Desirable Skills/Experience Although not essential, the following skills are desired by the client: Experience with Oracle software licensing and licensing datasets. Strong Oracle SQL and PL/SQL troubleshooting skills. Experience supporting IRM and SecOps. Experience troubleshooting Oracle-backed integrations, reconciliation issues and data integrity problems. If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
Nov 11, 2026
Contractor
Job Title: SC Eligible ServiceNow Technical Lead - Warwick Location: 2 days a week onsite in Warwick Salary/Rate: £500- £545 a day Inside IR35 Start Date: End of November Job Type: Initial 12 Month Contract SC Cleared Eligible Senior Technical Lead - ServiceNow SAM Pro - 2 days onsite in Warwick Candidates applying MUST have strong hands-on experience in BAU/support activities and development activities. Company Introduction We have an exciting opportunity available with one of our leading clients, who are looking for an experienced SC Eligible Senior Technical Lead to join their team on a contract basis. This is a key technical role focused on ServiceNow SAM Pro, platform stability, technical governance and production support within a complex enterprise environment. Job Responsibilities/Objectives As a Senior Technical Lead, you will act as a technical authority and escalation point for the ServiceNow platform, with a particular focus on SAM Pro and software licensing. You will lead complex technical issues, provide design assurance and ensure high-quality delivery across UK and offshore teams. Lead technical triage and resolution of major incidents, problems and complex production defects across SAM Pro, HRSD, ITSM, IRM and SecOps. Provide hands-on SAM Pro production support, including Effective License Position (ELP) calculations, software normalisation, reconciliation, entitlements and compliance reporting. Act as technical design authority, reviewing solution designs, code, update sets and releases while enforcing ServiceNow best practices and an out-of-the-box-first approach. Lead Root Cause Analysis (RCA) and drive improvements to platform stability, performance, data quality and compliance. Provide technical leadership to offshore teams, reviewing development quality, testing evidence and deployment readiness. Support software licensing compliance across major publishers including Oracle, Microsoft, VMware, IBM and Adobe. Required Skills/Experience The ideal candidate will have the following: Experience supporting ServiceNow SAM Pro in enterprise production environments. Strong hands-on expertise in ELP calculations, software normalisation, discovery reconciliation, entitlements, publisher packs and software compliance. Proven experience leading P1/P2 incidents, technical triage and Root Cause Analysis. Strong ServiceNow technical design, governance and platform architecture experience. Experience supporting ServiceNow HRSD and ITSM. Experience providing technical leadership to offshore development/support teams. Eligible for SC Clearance and willing to go through the process of getting SC Clearance Desirable Skills/Experience Although not essential, the following skills are desired by the client: Experience with Oracle software licensing and licensing datasets. Strong Oracle SQL and PL/SQL troubleshooting skills. Experience supporting IRM and SecOps. Experience troubleshooting Oracle-backed integrations, reconciliation issues and data integrity problems. If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format. Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.
