Roadmaps Security roadmaps Application, engineering and product security

Security Architecture and Zero Trust

Design systems that are secure by structure: reference architectures, defence in depth, threat modelling, design review and zero trust across identity, network and data.

Estimated time: 15–26 months · At about 10 hours a week.

Learning path

Click a topic to see what to learn and where. Mark topics as you go; your progress is saved in this browser only.

  • Core topic
  • Optional
  1. Beginner · 2–3 months Principles and patterns
  2. Intermediate · 3–5 months Zero trust and domain architectures
  3. Advanced · 4–6 months Enterprise architecture
  4. Expert · 6–12 months Leading architecture

All topics in detail

BeginnerTime: 2–3 months

Principles and patterns

Skills

  • Apply secure design principles to a design.
  • Threat model a system.
  • Identify trust boundaries and layer controls.

Hands-on projects and labs

  • Threat model a small web application with STRIDE and produce a mitigation list.
  • Draw a C4-style diagram of a system with its trust boundaries marked.

Done when you can…

  • Produce a threat model and control plan for a realistic system.
  • Explain a design's security using named principles.

Beginner

Secure design principles

Least privilege, defence in depth, fail secure, separation of duties, minimise attack surface and keep it simple. Every design decision should trace to a principle.

Resources

Beginner

Threat modelling

Draw the system, find what can go wrong, decide what to do about it and check you did. STRIDE and attack trees are the common starting tools.

Resources

Beginner

Trust boundaries and data flows

Security lives at the boundaries between components with different trust. Map the data flows and the boundaries before placing any control.

Resources

Beginner

Control types and layering

Preventive, detective and corrective controls, layered so that no single failure is fatal. Learn to reason about what each layer catches.

Resources

Beginner

Architecture frameworks

SABSA, TOGAF and the NIST frameworks give structure to architecture work. Use them as scaffolding, not as a substitute for thinking.

Resources

  • SABSA DocsFreeThe SABSA Institute

Beginner

Reading and drawing architecture

Learn to read network, application and data diagrams quickly and to draw your own clearly. Architecture is communicated through diagrams.

Resources

IntermediateTime: 3–5 months

Zero trust and domain architectures

Skills

  • Design zero trust access for users, devices and workloads.
  • Design segmented networks and cloud landing zones.
  • Set reusable application security patterns.
  • Run design reviews.

Hands-on projects and labs

  • Design a zero trust access architecture for a sample organisation, with policy decision and enforcement points.
  • Design a cloud landing zone with identity, logging and guardrails.
  • Review a design proposal and write findings with recommended patterns.

Done when you can…

  • Produce a zero trust target architecture with a migration path.
  • Run design reviews that teams find useful.

Intermediate

Zero trust principles

Verify explicitly, use least privilege and assume breach. Identity, device and context decide access, not network location.

Resources

Intermediate

Identity-centred architecture

Strong identity for users, devices and workloads is the foundation of zero trust. Design authentication, authorisation and policy decision points.

Resources

Intermediate

Network architecture under zero trust

Segmentation, micro-segmentation and ZTNA replace the flat trusted network. Design so that compromise of one segment stays contained.

Resources

Intermediate

Cloud security architecture

Landing zones, account structure, identity federation and guardrails. Cloud architecture mistakes are expensive to fix later.

Resources

Intermediate

Application and API architecture

Authentication at the edge, authorisation in the service, secrets handling and secure defaults. Set patterns that teams can reuse.

Resources

Intermediate

Security design review

Review proposals early, ask the right questions, and give findings that teams can act on. A good review is a conversation, not a gate.

Resources

AdvancedTime: 4–6 months

Enterprise architecture

Skills

  • Write reference architectures teams actually use.
  • Turn risk analysis into design decisions.
  • Design for resilience and legacy constraints.
  • Run architecture governance.

Hands-on projects and labs

  • Write a reference architecture for a common pattern with the controls and the rationale.
  • Produce a migration plan from a flat network to zero trust for a mixed legacy estate.

Done when you can…

  • Own a set of reference architectures used across teams.
  • Lead a significant architecture change, such as a zero trust migration.

Advanced

Reference architectures

Write the standard patterns for common needs, such as a public web service or a data pipeline, so teams build securely by default.

Resources

Advanced

From risk to design decisions

Architecture choices are risk choices. Learn to quantify and compare options and to explain trade-offs to the business.

Resources

  • SABSA DocsFreeThe SABSA Institute

Advanced

Legacy systems and migration

Most estates mix old and new. Design compensating controls for what cannot change and realistic paths for what can.

Resources

Advanced

Architecture governance

Standards, review boards and exception processes keep architecture consistent without blocking delivery. Design the process as carefully as the systems.

Resources

  • TOGAF DocsFreeThe Open Group

Advanced

Architecting for new technology

AI systems, confidential computing and post-quantum cryptography each change the architecture. Learn to evaluate new technology against principles.

Resources

ExpertTime: 6–12 months

Leading architecture

Skills

  • Set and deliver architecture strategy.
  • Influence engineering leaders and the business.

Hands-on projects and labs

  • Write a three-year security architecture strategy for an organisation.
  • Present a zero trust business case to a mock executive group.

Done when you can…

  • Lead security architecture for an organisation with measured adoption.
  • Own standards that shape how every system is built.

Expert

Architecture strategy

Set the multi-year direction for the security architecture, aligned to business strategy and technology change, and the standards that enforce it.

Resources

  • SABSA DocsFreeThe SABSA Institute

Expert

Influence without authority

Architects rarely own the teams that build. Persuade with clear trade-offs, reusable patterns and early involvement.

Resources

Expert

Measuring architecture

Track adoption of reference patterns, zero trust maturity, exceptions and design review coverage. Show the architecture reducing risk.

Resources

Overview

Security architecture decides where controls go and how systems fit together so that security holds even when individual parts fail. It works at the level of designs, patterns and principles rather than single tools.

Zero trust is the dominant modern architecture: never trust by network location, always verify identity and device, and grant the least access needed. The role spans threat modelling new designs, reviewing proposals, setting reference patterns and translating risk into technical decisions.

Why it matters

Many breaches come from systems that were insecure by design, not by bug. Organisations need architects who can shape designs before they are built and lead the shift to zero trust across sprawling estates.

Typical job roles

  • Mid-levelSecurity engineer (design focus) Threat models and reviews designs.
  • SeniorSecurity architect Designs security for systems and platforms.
  • SeniorEnterprise security architect Sets reference architectures across the organisation.
  • LeadChief security architect Owns the architecture vision and standards.

Prerequisites

  • Broad experience in at least two security domains, such as network, cloud, identity or applications.
  • How systems are built: infrastructure, applications, identity and data flows.
  • Risk management basics.
  • Clear diagramming and writing.

Cybersecurity fundamentals

Tools and technologies

Certifications

Take them in roughly this order. Costs and details for the ones marked with a link are on the Certifications page.

  1. Advanced CISSP ISC2The common baseline for architects.Cost and exam details
  2. CISSP-ISSAP ISC2Architecture concentration.
  3. SABSA Chartered Architect The SABSA InstituteRisk-driven security architecture.
  4. Intermediate TOGAF Certification The Open GroupEnterprise architecture method.

Resources

Frameworks and standards

All frameworks and standards

Career path

A common progression. Titles vary between companies.

  1. Engineer in a security or infrastructure domain0–5 years
  2. Security engineer with a design focus4–7 years
  3. Security architect7–12 years
  4. Enterprise or chief security architect12+ years

Related domains to move into

All security roadmaps Back to top

Last reviewed: . Found a mistake, or want a roadmap written sooner? Contact