Better Insight.
Better Outcomes.

In complex and highly regulated environments, organisations need clarity they can act on. Tiaa provides specialist assurance and advisory services that help organisations manage risk, strengthen performance and move forward with confidence. Our expertise includes internal audit, anti-crime, security management, IT audit, cyber assurance and advisory services.

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Bridge the Gap - Top up Audits

Are you confident that your organisation is fully protected against emerging risks? Take the next step in safeguarding your business by booking a top-up audit. Our comprehensive evaluations are designed to identify and address lingering vulnerabilities, ensuring nothing slips through the cracks. Why Choose a Top-Up Audit?

  • Pinpoint areas for improvement in your risk management strategies
  • Ensure previous recommendations have been implemented effectively
  • Stay ahead of regulatory changes and compliance requirements
  • Reassure stakeholders of your commitment to continuous improvement
Schedule Your Audit

Security Matters Blog

Martyn’s Law is no longer a future concept—it is on the statute book, with enforcement  by the regulator (Security Industry Authority SIA) from April 2027. The question for the heritage sector is not what is it, but how prepared are you?

This latest blog in our Security Matters series explores what Martyn’s Law means in practice — and why now is the time to act.

Security Matters

Our Services

We offer an extensive range of services for a multitude of sectors

Advisory Services
HR Investigations
Security Management
Anti-Crime
Cyber Security
IT Audit
Internal Audit

Advisory Services

As business assurance providers, we are ideally placed to pro-actively assist organisations to develop strong governance arrangements, and to help...

HR Investigations

Tiaa provides a full portfolio of training and development products in a variety of formats, including face-to-face, virtual, and online...

Security Management

Tiaa can help protect your staff, visitors and assets from violence and crime. Our skilled team have been conducting security...

Anti-Crime

Our highly regarded Anti-Crime Team have been providing our client’s with advice, guidance and practical solutions to prevent and mitigate...

Cyber Security

No IT system is 100% secure. What matters is how prepared you are. Understanding the criticality of information security, Tiaa...

IT Audit

Digital technology underpins every aspect of how your organisation works. Tiaa has a dedicated team of ICT specialists, who have...

Internal Audit

An effective internal audit service can play a vital role in helping you maintain a strong governance and risk management...

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The Tiaa Difference

Independent Advice. Specialist Expertise. Better Outcomes.

Choosing the right assurance partner is about more than compliance. It’s about finding a team that understands your world, brings clarity to complex challenges and helps you make confident decisions.

Tiaa is a specialist provider of business assurance services, focused exclusively on helping organisations strengthen governance, manage risk and improve performance. Unlike firms that combine assurance with a broader range of financial services, our specialist focus allows us to provide independent insight, practical guidance and support that delivers meaningful, lasting impact.

The Advantage of Specialist Expertise

At Tiaa, business assurance isn’t one of many services. It’s our sole focus.

That specialist approach allows us to provide independent advice, deep expertise and practical insight that helps organisations navigate complexity and make confident decisions.

This means:

  • Independent advice you can trust – our recommendations are objective, evidence-led and focused on achieving the right outcomes for your organisation.
  • Deep specialist expertise – our teams focus exclusively on assurance services, bringing extensive sector knowledge and practical experience to every engagement.
  • A clear and independent perspective – our specialist focus enables us to deliver practical insight that helps organisations strengthen governance, manage risk and improve performance.

A Guarantee of Transparency and Stability

As part of Adsure Services PLC, a publicly listed company, we provide unmatched financial transparency compared to privately held accountancy firms.

Our clients benefit from:

  • Complete financial visibility—our financial performance is publicly disclosed, offering clients greater confidence in our stability.
  • Stronger governance and oversight—as a listed entity, we operate under rigorous regulatory scrutiny.
  • A long-term partnership you can trust—our financial resilience ensures we will be here to support you for years to come.

A Certified Commitment to Ethical Business

As a certified B Corp, Tiaa is committed to creating a positive impact through the way we work, the advice we provide and the relationships we build. This reflects our dedication to:

  • Social value and responsible business practices
  • High standards of integrity and corporate governance
  • A purpose-led approach to assurance and advisory services

Working with Tiaa means partnering with a team that is independent, principled and focused on doing the right thing. We combine specialist expertise with ethical thinking and practical insight to help organisations strengthen performance, manage risk and deliver meaningful outcomes for the people and communities they serve

Better insight. Better outcomes.

Tiaa Hub

Get the latest news and updates about our services and the industry from the Tiaa hub

Publication

Insight – NHS Board Assurance Frameworks

Newsletter

Security Focus Newsletter Edition 11

Newsletter

Fraud Stop All Sectors – Issue 8

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