How to buy

Five ways to buy from ACS

Whether you are a company, a public body, a consultancy or a supplier, here is how to engage ACS.

Routes to buy

Public buyers

Bloom

Public buyers can award work to ACS through Bloom.

Public buyers

Constellia

Public buyers can also award work to ACS through Constellia.

Public buyers

GCA RM6237 Low Value Purchase System

A Dynamic Purchasing System run by the Government Commercial Agency (GCA). ACS is an appointed supplier; eligibility is confirmed per opportunity.

Any organisation

Direct contract

Companies, charities and public buyers using their own procedures can contract with ACS directly. ACS is registered on the Central Digital Platform.

Consultancies and primes

Through a partner

ACS works as prime or subcontractor alongside larger consultancies and specialist firms. Partnering with ACS.

Tell us which route you want to use and we will confirm the details your team needs.

Credentials

We hold:

  • Cyber Essentials certification (since 21 Aug 2026).
  • Good Business Charter accredited (about the Good Business Charter).
  • Disability Confident Committed.
  • Supply Chain Sustainability School Bronze member.
  • Armed Forces Covenant signatory (our commitments).
  • Registered on the Central Digital Platform.

Insurance

Professional indemnity, public liability and employer's liability insurance held. Evidence of cover (policy schedule and employer's liability certificate) is available on request, before contract.

Conflicts of interest

We check for conflicts before we accept any work, and tell you if we cannot act. Our standards.

Armed Forces Covenant

ACS signed the Armed Forces Covenant in July 2026. In our pledge we committed to:

  • make sure veterans, reservists, military spouses and partners are not disadvantaged in employment and associate opportunities, recognise their transferable skills, and consider reasonable flexibility for training, mobilisation and military-family circumstances, subject to operational needs;
  • engage with Armed Forces networks and charities, share relevant opportunities, and consider professional, voluntary or reduced-fee support where appropriate and capacity allows;
  • treat veteran-led businesses and Armed Forces Community suppliers fairly, and encourage our delivery partners to uphold the Covenant's principles;
  • publish these commitments and recognise the Armed Forces Community through our website and communications;
  • review these commitments every year, record what we have done and invite feedback.

We welcome feedback from the Armed Forces Community, clients, associates and partners at . Signing the Covenant does not imply endorsement by the Ministry of Defence.

Not sure where to start?

Send us the decision, contract or bid in front of you. We will tell you whether we can help, who would lead the work and an indicative cost range, before you commit to anything.

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