Security Infrastructure Engineer

CBSbutler Holdings Limited trading as CBSbutler; England; On-site; GBP 80,000 - 100,000; Part time

Job summary

A leading technology consulting company in the UK is seeking an experienced Security Infrastructure Engineer to support the Security Team in installing and maintaining secure infrastructure solutions. This hybrid role requires SC/DV clearance, expertise in security frameworks, and strong experience with Linux and VMware technologies. You will work closely with technical teams to ensure compliance and security. Excellent compensation range of £500 to £575 per day is offered, along with opportunities to work within a complex defense environment.

Qualifications

• Strong experience in security infrastructure engineering within regulated environments.
• Experience supporting the installation and configuration of secure infrastructure solutions.
• Knowledge of security frameworks including NIST CSF and ISO 27001.

Responsibilities

• Support installation and maintenance of secure infrastructure.
• Produce security engineering designs and documentation.
• Engage with stakeholders to deliver security engineering solutions.

Skills

Security infrastructure engineering

Ubuntu / Linux administration

PKI hierarchies administration

LDAP design and management

RADIUS / TACACS configuration

Scripting (Python, PHP)

Network infrastructure knowledge

Education

CompTIA Security+

GIAC Security Essentials (GSEC)

Systems Security Certified Practitioner (SSCP)

Tools

VMware

Cisco IOS-XE

Job description

Security Infrastructure Engineer

+6 months +

+Hybrid in Corsham

+Inside IR35

+ 500 - 575 a day

+SC / DV cleared role

Skills:

+SC / DV clearance

+Vmware

+Linux

+Cyber Security

+MOD experience

We are seeking an experienced Security Infrastructure Engineer to support the Security Team in the installation, configuration, maintenance, and update of servers and software components.

Working closely with the Project Manager (PM), Technical Design Architect (TDA), Security Assurance Coordinator (SAC), and wider engineering teams, you will play a key role in delivering compliant, accredited, and secure infrastructure solutions within a complex defence environment.

Key Responsibilities

• Support the installation, configuration, administration, and maintenance of secure infrastructure and software components.
• Work with the PM, TDA, and engineering teams to produce system security engineering designs, solutions, and documentation.
• Act as the primary security engineering conduit between PM, SAC, TDA, and engineering teams to ensure compliant security solutions.
• Attend and contribute to regular governance and review meetings, including the Security Working Group (SWG).
• Engage with stakeholders and dependent projects to deliver coordinated security engineering solutions supporting accreditation and registrations.
• Contribute to the Security Accreditation Plan in coordination with the Project SAC.
• Validate engineering designs against JSP 453 / JSP 604, providing supporting evidence and documentation.
• Identify security risks, recommend mitigations, and advise on secure design decisions.
• Provide advice on in-service and emerging cyber security technologies, including cost, risk, and benefits analysis.

Essential Knowledge, Skills & Experience

• Strong experience in security infrastructure engineering within secure or regulated environments.
• Infrastructure access control expertise, including:
  • Ubuntu / Linux system administration
  • LDAP design and management
  • RADIUS / TACACS configuration
• Proven experience supporting the installation, configuration, administration, and support of secure infrastructure solutions.
• Strong understanding and administration of PKI hierarchies.
• Knowledge of security frameworks including NIST CSF, ISO 27001, and MOD Secure by Design (SbD).
• Experience providing security input to:
  • Virtualisation technologies (VMware ESXi 8, vCentre 8)
  • Network infrastructure (Cisco IOS-XE, ASA, BGP, VRF/MPLS, VPN, QoS)
• Clear understanding of JSP 604 / JSP 453 network security engineering compliance.

Highly Desirable Qualifications

• Cyber security certifications such as:
  • CompTIA Security+
  • GIAC Security Essentials (GSEC)
  • Systems Security Certified Practitioner (SSCP)

Desirable Skills & Experience

• Scripting and automation (Python, PHP).
• Delivery in high-pressure, complex organisational environments.
• Writing and analysing technical and security requirements.
• Supporting product selection against cost, performance, and timescale constraints.
• Experience working within large, multi-disciplinary technical teams.
• Knowledge of Cyber Essentials / Cyber Essentials Plus.
• Experience with penetration testing and system security assurance.
• In-date professional registration (e.g. APMG, CIISec).
• Experience delivering secure solutions within the UK public sector, ideally Defence Digital.
• Delivery experience across Agile (SAFe4) and Waterfall methodologies.
• Knowledge of SCOM.

If you'd like to discuss this Security Infrastructure Engineer role in more detail, please send your updated CV to (url removed) and I will get in touch.