Enterprise Security Architect

Theapexgroup; Greater London; On-site; GBP 120,000 - 160,000; Full time

Job summary

Apex Group is seeking an experienced Enterprise Security Architect to join our Security Architecture team. You will design and guide secure technology solutions across the organization, building scalable and resilient systems that meet regulatory commitments.

You will lead security design, threat modelling, and collaboration with infrastructure, data and application teams, translating policies into concrete controls and architecture diagrams.

Qualifications

• 10+ years in cybersecurity or infrastructure roles with architecture experience.
• Experience architecting secure systems in large enterprises.
• Strong knowledge of NIST, ISO 27001, MITRE ATT&CK, SOC2 and OWASP.

Responsibilities

• Serve as the security design authority for projects, initiatives, or architectural domains.
• Translate security policies and standards into actionable design controls and implementation guidance.
• Evaluate emerging technologies, products, and platforms for alignment with enterprise security strategy.
• Conduct architecture risk assessments and threat modelling to identify potential exposures.
• Collaborate with infrastructure, application, and data teams to ensure secure solution design and integration.
• Document and maintain security architecture artefacts, including diagrams, control mappings, and design decisions.

Skills

Security architecture

Cloud security

Threat modelling

Security standards

Tools

AWS

Azure

IAM

API gateways

ZTNA

Job description

The Apex Group was established in Bermuda in 2003 and is now one of the world's largest fund administration and middle office solutions providers.

Our business is unique in its ability to reach globally, service locally and provide cross-jurisdictional services. With our clients at the heart of everything we do, our hard-working team has successfully delivered on an unprecedented growth and transformation journey, and we are now represented by over circa 13,000 employees across 112 offices worldwide. Your career with us should reflect your energy and passion.

That's why, at Apex Group, we will do more than simply 'empower' you. We will work to supercharge your unique skills and experience.

Take the lead and we'll give you the support you need to be at the top of your game. And we offer you the freedom to be a positive disrupter and turn big ideas into bold, industry-changing realities.

For our business, for clients, and for you

The Role

Apex is looking for an experienced Enterprise Security Architect to join our growing Security Architecture team. This role is pivotal in designing and guiding the implementation of secure technology solutions across the organization. You will help build scalable, resilient, and secure systems that support Apex's business objectives and regulatory commitments.

Key Responsibilities

• Serve as the security design authority for assigned projects, initiatives, or architectural domains.
• Translate security policies and standards into actionable design controls and implementation guidance.
• Evaluate emerging technologies, products, and platforms for alignment with enterprise security strategy.
• Conduct architecture risk assessments and threat modelling to identify potential exposures.
• Collaborate with infrastructure, application, and data teams to ensure secure solution design and integration.
• Document and maintain security architecture artefacts, including diagrams, control mappings, and design decisions while aligned with Apex's technology roadmap and business goals.
• Execute delegated tasks as deemed appropriate by the Group CISO and other empowered Group Cyber leadership authorities, ensuring timely and effective completion in alignment with organizational priorities.
• Support the Group Cyber Strategy end-to-end, driving alignment of all activities, decisions, and deliverables with strategic objectives and business outcomes.

Areas of Specialization

• Identity Security: Identity and access architecture across workforce, privileged, service, application and machine identities; identity governance, modern authentication, access lifecycle management, conditional access, PAM/PIM, federation, SSO, MFA, identity threat detection, and zero trust identity control design.
• AI & Blockchain Architecture: Secure architecture and governance for AI, machine learning, generative AI, agentic solutions, distributed ledger technologies and blockchain-enabled platforms; including model and data protection, AI risk controls, prompt and output security, smart contract assurance, tokenization, wallet/key management, privacy, auditability, regulatory alignment, and integration with enterprise identity, data, cloud and application security controls.
• Cloud & Infrastructure Security: Secure deployment and integration across hybrid/multi-cloud environments, network security, IaaS/PaaS/SaaS controls, and cloud governance.
• Security Architecture Advisory Services: Strategic and technical guidance across domains, aligning security architecture with business objectives. Focus areas include zero trust principles, risk-based decision-making, and security integration into digital transformation initiatives.

Required Experience & Skills

Experience

• 10+ years of overall experience in cybersecurity or infrastructure/application roles, with 5-7 years of experience in architecture, design, or engineering roles involving security.
• Proven experience architecting secure systems in large or complex enterprise environments.

Technical Expertise

• Hands-on exposure to one or more of: AWS, Azure, IAM, API gateways, ZTNA technologies or data security technologies.
• Strong understanding of security principles, design patterns, and defense-in-depth strategies.

Knowledge of Standards

• Strong knowledge of relevant security standards and frameworks such as NIST, ISO 27001, MITRE ATT&CK, SOC2 and OWASP.

Communication Skills

• Ability to articulate technical risks and architectural decisions to both technical and non-technical audiences.

Certifications

• Architectural qualifications (e.g., SABSA, TOGAF) are essential.
• Professional certifications (e.g., CISSP, CCSP, AWS/Azure Architect) are highly desirable.

Why Join Apex:

• Opportunity to work with senior security professionals across multiple global teams.
• Exposure to modern technologies and enterprise-scale transformation projects.
• Flexible work options and a strong focus on