Enterprise Services Principal Administrator (Identity)

Location: London (Hybrid – 3 days onsite)

Salary: £90,000 per year

Position Purpose

Our client is on an ambitious journey to modernise its IT infrastructure and application portfolio, delivering resilient, cloud-native, and hybrid on-premises solutions. The Enterprise Services Principal Administrator will play a pivotal role in supporting this transformation, managing end-to-end physical, virtual, and cloud platforms, and driving the next phase of infrastructure modernisation. This role is critical to implementing the cloud strategy while maintaining a secure, agile, and optimised infrastructure environment.

Key Responsibilities

• Develop, communicate, and maintain 3–5 year infrastructure roadmaps aligned with business strategy
• Lead cloud adoption initiatives and drive transformation from traditional to modern infrastructure principles
• Provide technical leadership across IT infrastructure including Ansible, Terraform, GitLab, Kubernetes, Microsoft Entra ID, Active Directory, Azure, VMWare VCF, Linux, Docker, Backup/DR
• Build strong partnerships with Infrastructure and Application teams to understand current platforms and plan future architecture
• Implement and maintain infrastructure governance processes, policies, standards, and principles
• Advise stakeholders on infrastructure solutions, risks, costs, and benefits
• Ensure reliability, availability, and performance of infrastructure services with SLA focus
• Identify continuous improvement opportunities and implement solutions to optimise delivery and operations
• Maintain knowledge of IT industry best practices, emerging technologies, and security trends
• Participate in the on-call rota as required

Required Skills & Experience

• Experience with One Identity Active Roles, Microsoft Entra ID, and Active Directory
• Hands-on knowledge of Azure SSO (App Registrations / Enterprise Applications) and Conditional Access Policies
• Experience with Just in Time Access / Provisioning and zScaler products
• Strong experience in infrastructure technologies: Linux, Kubernetes, Docker, Azure, AWS, VMWare VCF, Backup/DR
• Proven experience in Infrastructure Automation & Orchestration (Ansible, Terraform, GitLab)
• Deep understanding of core platforms, enterprise networking, data centre infrastructure, and infrastructure security
• Ability to provide technical leadership, influence stakeholders, and coach teams
• Excellent written and verbal communication skills

Competencies

• Logical and analytical problem-solving
• Ability to quickly assess technology areas and propose improvements
• Strong leadership and ability to influence at all levels
• Experience mentoring and guiding technical teams