Technical Security Architect

Hackajob Ltd; Greater London; On-site; GBP 95,000 - 120,000; Full time

Job summary

Hackajob Ltd in Hampshire is seeking a hands-on Technical Security Architect to design, develop and maintain security architectures across cloud, on-prem and hybrid environments. This is an active delivery role, not governance, with responsibility for detailed designs and guiding implementation teams.

You will lead security technology refreshes, IAM and cloud security workstreams, align with standards such as NIST and ISO 27001, and collaborate with enterprise and network architects to mature

Qualifications

• Significant experience as a Technical Security Architect, Security Architect or Senior Security Engineer.
• Strong technical expertise across IAM, network security, cloud security, endpoint security and secure platforms.
• Proven experience delivering security technology refresh, migration or modernisation programmes.
• Strong experience with AWS, Azure and/or GCP security architecture.
• Experience producing detailed technical architecture documentation.
• Strong understanding of threat modelling, risk and security architecture principles.
• Experience working within complex, regulated or formally accredited environments.
• Excellent communication skills and the ability to influence both technical and senior stakeholders.
• CISSP (or equivalent) and TOGAF and/or SABSA.

Responsibilities

• Design and deliver security architectures across cloud, on-premise, hybrid and air-gapped environments.
• Produce technical designs including HLDs, LLDs, architecture patterns and data-flow diagrams.
• Lead the refresh and evergreening of security technologies, including IAM, PAM, firewalls, EDR/XDR, SIEM, vulnerability management and cloud security.
• Evaluate new technologies through PoCs/PoVs and make clear, evidence-based recommendations.
• Design and review cloud, identity, network, perimeter and platform security solutions.
• Apply Zero Trust, defence-in-depth and threat-informed design principles.
• Ensure security architectures align with NIST, ISO 27001, CIS, NCSC and client security requirements.
• Act as a security design authority, providing technical guidance and architectural decisions.
• Work closely with enterprise, infrastructure, network and application architects to embed security across the technology landscape.
• Support security accreditation, risk assessments and client security reviews.
• Keep pace with emerging threats and technologies and identify opportunities to improve and simplify the security estate.

Skills

Technical Security Architect

Security Architect

Senior Security Engineer

IAM

Network security

Cloud security

Endpoint security

Secure platforms

Threat modelling

Stakeholder influence

CISSP

TOGAF

SABSA

Education

CISSP (or equivalent)

TOGAF

SABSA

Job description

Our client is a global IT services company.Job Description:Our client is committed to building diverse, inclusive teams. We welcome applications from all backgrounds and particularly encourage interest from women, underrepresented groups, and neurodivergent candidates. We offer reasonable adjustments throughout the hiring process and are dedicated to creating a supportive, accessible environment for everyone.

Technical Security ArchitectLocation: Hampshire (5 days per week onsite)

Due to the nature of the work and the customers we support, the successful candidate must be eligible to meet UK Government and contractual personnel security requirements, including the applicable residency requirements for the role, and have the right to work in the United Kingdom. Some roles may also be subject to nationality requirements where these are necessary to meet UK Government or contractual security obligations.

The Technical Security Architect is responsible for designing, developing, and maintaining technical security architectures that protect the organisation's information systems, data, and infrastructure. Embedded within the Technical team, this role leads the tech refresh and evergreening of security toolsets - ensuring the security technology estate remains current, supported, effective, and aligned with evolving threat landscapes, client policies, and cross-domain architectural patterns.

This is a hands-on architecture role, not a governance-only position. The Technical Security Architect is expected to produce detailed technical designs, evaluate and select security technologies, define integration patterns, and guide implementation teams through delivery. The role requires deep technical expertise across cloud security, identity and access management, boundary and perimeter security, secure platform architectures, and security tooling ecosystems.

Key Responsibilities

• Design and deliver security architectures across cloud, on-premise, hybrid and air-gapped environments.
• Produce technical designs including HLDs, LLDs, architecture patterns and data-flow diagrams.
• Lead the refresh and evergreening of security technologies, including IAM, PAM, firewalls, EDR/XDR, SIEM, vulnerability management and cloud security.
• Evaluate new technologies through PoCs/PoVs and make clear, evidence-based recommendations.
• Design and review cloud, identity, network, perimeter and platform security solutions.
• Apply Zero Trust, defence-in-depth and threat-informed design principles.
• Ensure security architectures align with NIST, ISO 27001, CIS, NCSC and client security requirements.
• Act as a security design authority, providing technical guidance and architectural decisions.
• Work closely with enterprise, infrastructure, network and application architects to embed security across the technology landscape.
• Support security accreditation, risk assessments and client security reviews.
• Keep pace with emerging threats and technologies and identify opportunities to improve and simplify the security estate.

What you'll bring

• Significant experience as a Technical Security Architect, Security Architect or Senior Security Engineer.
• Strong technical expertise across multiple security domains, particularly IAM, network security, cloud security, endpoint security and secure platforms.
• Proven experience delivering security technology refresh, migration or modernisation programmes.
• Strong experience with AWS, Azure and/or GCP security architecture.
• Experience producing detailed technical architecture documentation.
• Strong understanding of threat modelling, risk and security architecture principles.
• Experience working within complex, regulated or formally accredited environments.
• Excellent communication skills and the ability to influence both technical and senior stakeholders.
• CISSP (or equivalent) and TOGAF and/or SABSA.

Desirable:

• Zero Trust, DevSecOps, MITRE ATT&CK, SIEM, PAM, Kubernetes/container security, PKI and security automation experience.

We believe strong connections and community are key to our success. Our work model prioritizes in-person collaboration while offering flexibility to support wellbeing, productivity, individual work styles, and life circumstances. We're committed to fostering an inclusive environment where everyone can thrive.

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