Business: Constellia Approved

21 Sept 2026

SIACO becomes an approved supplier

SIACO is delighted to become an approved supplier by Constellia.

Constellia empowers procurement functions by providing access to a dynamic marketplace of pre-vetted local and national suppliers.

Constellia supports all elements of the procurement process including supplier onboarding, SoW creation, the tender process, contract award, and milestone-based invoicing and payment. Awarding of requirements by public sector clients is fast and efficient, a little as one working day for a direct award and five working days for a mini competition.

As the only Neutral Vendor Managed Service Provider in the UK to offer public sector organisations a comprehensive solution for procuring goods, works, technology, and services - they serve as a one-stop shop for procurement.

Established in 2007, Constellia now influence over £1 billion of spend across 426 subcategories, benefiting over 200 public and private sector organisations. Operating under the AEC, SEWTAPS and ESPO MSTAR4 Neutral Vendor Framework, they provide fully compliant access to an unlimited marketplace of pre-vetted large corporations, SMEs, and micro-SMEs.

Benefits To Clients Choosing the Constellia Solution

Cost-Savings: Supplier-absorbed fees, free access to our Source-to-Pay (S2C) platform and average savings of 12-20% of budget.
Real-time Data: Constellia's user-friendly platform provides live project and management information (MI) access.
Compliance: Constellia's MSP solution offers a compliant route to market via AEC, SEWTAPS and ESPO MSTAR4 Neutral Vendor Frameworks.
One-Stop Shop: Constellia is the only Neutral Vendor to provide public sector organisations access to goods, works, and services across 426 subcategories.
Rapid Process: Direct Awards can be awarded in as little as one working day, and Mini Competitions as little as five.
Achieve SME targets: Constellia provides fully compliant access to an unlimited marketplace of pre-vetted, local, and national suppliers, including SMEs and micro-SMEs.
On-demand resource: Constellia's procurement specialists are available on-demand to support with managing the end-to-end procurement process, for example, writing specifications, running competitions, evaluating proposals, and managing contracts.

Should you wish to find out more information or sign up to Constellia platform, please email: info@constellia.com or call 0330 320 8020.