Hadfield Green is recruiting a senior IT Systems Administrator to serve as technical lead on a significant Cyber Security infrastructure programme within a critical, always-on operational environment. Specialising in Microsoft technologies, this role bridges the IT Operations function and the Cyber Security Project Team — responsible for the design, planning, and delivery of security-driven infrastructure change.
You will work closely with internal and external stakeholders to build infrastructure and security architectures that meet business objectives, regulatory expectations, and strict service-level and availability requirements.
What You’ll Do
- Serve as technical lead for Cyber Security infrastructure initiatives in a live 24/7 environment
- Develop and implement industry best-practice infrastructure designs ensuring scalability, resilience, and security
- Manage vulnerability assessment and security patch management programmes
- Implement and test high-availability and disaster recovery strategies
- Produce high-quality documentation for internal and external audit purposes
- Provide infrastructure and security performance monitoring against agreed SLAs
- Resolve escalated technical issues from first and second line support
- Mentor junior staff and contribute to ongoing process improvement
- MCSA, MCP and/or CCNA certified with expert-level Windows Server 2019/2022/2025 implementation, administration, and Windows 11 client OS skills
- Deep knowledge of Active Directory, Group Policy, network protocols, and concepts
- Strong experience with backup solutions and principles; NetBackup knowledge an advantage
- Proven analytical and problem-solving skills with the ability to work both independently and collaboratively across all levels of seniority
- Strong organisational, documentation, and communication skills with proven experience working under strict process control methodologies such as ITIL
- Virtual platform (VMware), storage technology, and Linux (RedHat/OEL) experience desirable
- Proficiency with automation tools including Python, Ansible, and REST APIs desirable
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