Security Architect – SC Clearance Eligible | NHS & Cloud

Littlefish Group; United Kingdom; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Referral bonus £1000

LinkedIn Learning access

Healthcare cash plan

Casual dress policy

Company Pension Scheme

Company social events

25 days annual leave

Annual leave purchase

Job summary

Littlefish Group is seeking an experienced Cyber Security Architect to lead security architecture across complex environments. You will own security design decisions, influence programme direction and represent the company in change and design authority forums.

Key responsibilities include producing security designs and records, conducting threat modelling, and delivering security assessments across Microsoft 365 and Azure, while mentoring CSOC and engineering teams.

Qualifications

• Proven experience in security architecture, security consultancy or senior security engineering.
• Experience acting as a Security Architect or design lead within large, complex programmes.
• Strong knowledge of Zero Trust, IAM (Entra ID), Azure and Microsoft 365 security.
• Experience with threat modelling and MITRE ATT&CK to inform design and controls.
• Familiarity with governance forums such as CAB and design authority processes.

Responsibilities

• Own security architecture and risk positions across assigned areas.
• Shape and maintain security architecture principles, patterns and roadmaps.
• Produce security designs, decision records and threat models for reviews.
• Review designs, integrations and third‑party components for security impact.
• Deliver security assessments, architecture reviews and posture reviews of Microsoft 365/Azure.
• Mentor CSOC and project engineering teams on security design and controls.
• Support pre‑sales with reusable security designs and playbooks.

Skills

Security architecture

Security consultancy

Design leadership

Threat modelling

Zero Trust

MITRE ATT&CK

CAB design authority

Education

Professional cyber security certifications (SC-100/SC-200/AZ-500/CISSP/CISM/TOGAF/SABSA)

Tools

Microsoft Sentinel

Microsoft Defender suite

Job description

Littlefish Group is seeking an experienced Cyber Security Architect to lead security architecture across complex environments. You will own security design decisions, influence programme direction and represent the company in change and design authority forums.

Key responsibilities include producing security designs and records, conducting threat modelling, and delivering security assessments across Microsoft 365 and Azure, while mentoring CSOC and engineering teams.