Security Architecture Lead – SaaS & AI Guardrails

Anaplan; Greater London; On-site; GBP 110,000 - 150,000; Full time

Job summary

Anaplan is building a formal security architecture practice, and this role leads it. You will turn security architecture into a deliberate, reusable asset for the company: reference architectures, identity and authorisation patterns, cryptography standards, and AI guardrail designs that become the natural, low‑friction path for engineering rather than a checkpoint to work around.

This is a people‑leadership role with deep technical scope, reporting to the Director of Product Security.

Qualifications

• Track record building or leading security architecture in SaaS/cloud-first environments.
• Deep architecture credibility: identity and authorisation, cryptography, secure-by-design, and threat modelling.
• Hands-on depth to challenge designs while staying technically credible.
• People leadership: hiring, coaching, calibrating a senior team, and making hard calls on performance.
• Experience aligning architecture to enterprise and regulated environments.

Responsibilities

• Define how architecture reviews work at Anaplan, what gets reviewed, when, by whom, and against which bar.
• Drive security reference architectures, identity/authorisation patterns, cryptography architecture, and AI guardrail design as living standards.
• Establish and maintain security engineering principles shaping platform building.
• Lead architecture and design reviews for major platform and AI changes.
• Engage with platform engineering on Hyperblock and Polaris to reflect how the platform works.
• Ensure security architecture meets enterprise and regulated environment demands by design.
• Turn architecture decisions into policy-as-code and enforce guardrails.
• Hire, coach, calibrate, and mentor the architecture team.

Skills

Security architecture leadership

SaaS/cloud architecture

Threat modelling

Identity and access management

People leadership

Regulated environments experience

Tools

Policy-as-code

Security standards

Job description

Anaplan is building a formal security architecture practice, and this role leads it. You will turn security architecture into a deliberate, reusable asset for the company: reference architectures, identity and authorisation patterns, cryptography standards, and AI guardrail designs that become the natural, low‑friction path for engineering rather than a checkpoint to work around.

This is a people‑leadership role with deep technical scope, reporting to the Director of Product Security.