Project CALLISTO

Ministry of Defence

Published: Jul 6, 2026

Updated: Jul 8, 2026

Source: uk_contracts_finder

About This Opportunity

This is a services contract in the architecture and engineering sector. Located in United Kingdom, Europe, this opportunity is open to firms and consortiums, with an estimated budget of GBP 750,000. Proposals must be submitted before July 27, 2026.

Published through UK Contracts Finder, a national government procurement portal. Public procurement tenders follow the country's national bidding regulations and may have specific eligibility and documentation requirements for services in the architecture and engineering sector. Service contracts are typically evaluated on both technical quality and price, and may require bidders to demonstrate relevant experience and qualified personnel. Interested parties should review the full documentation on the original source before submitting their proposal.

Description

Project CALLISTO Requirement: Affordable, single use engines for current and future air systems, munitions & One Way systems, to bridge the performance gap between hobbyist, model aircraft engines and higher performance, long-life & more exquisite engines. This phase will consist of design, development and ground testing (in appropriate engine test facilities) of Qty 4 prototype engines. The engines must be affordable and scalable. Any future scaled production requirement is not included under this competition, and if required shall be subject to a separate procurement. LOTS: This procurement is split into TWO Lots: LOT 1 CALLISTO LIGHT is for a smaller, less powerful engine (750N) LOT 2 CALLISTO HEAVY is for a more powerful engine, (1.8-2kN) Tenderers are able to bid for one or both lots. Full details of the requirement and anticipated dates can be found in the linked ITT. Tenderers wishing to take part must submit an ITT on the Defence Sourcing Portal no later than the specified closing date.. CPV: Engineering design services (71320000). Procedure: Open procedure (below threshold). Suitable for SMEs

Data provenance

This notice is sourced from UK Contracts Finder and was originally published on July 6, 2026. Last refreshed today. Reference: tender_532862/1586346. BidsFactory mirrors official procurement notices and links back to the source for full legal text.

About Ministry of Defence

Ministry of Defence has issued 959 procurement notices on BidsFactory, including 44 currently open and 712 awarded contracts. Activity concentrates in Information & Communication Technology, Architecture & Engineering Services, and Governance & Public Administration. Tenders span 6 countries including CY, Singapore, and New Zealand. Notices are distributed via UK Contracts Finder, UK FTS - Find a Tender Service, and TED - Tenders Electronic Daily (EU). Most recent publication: July 6, 2026.

Frequently asked questions about this tender

What is the estimated budget?

The estimated contract value is £750,000 - £750,000. Bidders should ensure their proposals are consistent with this range and account for any local taxes and contract execution costs.

Where will the contract be performed?

The contract is for delivery in United Kingdom. Foreign bidders should review local registration, taxation, and any in-country presence requirements before submitting.

How can I submit a bid?

Visit UK Contracts Finder to access the full notice, required documents, and submission instructions. Quote reference tender_532862/1586346 when communicating with the contracting authority.

When does this tender close?

The submission deadline is July 27, 2026. You have 19 days left to prepare and submit your proposal to the contracting authority.

Who is the contracting authority?

This notice was issued by Ministry of Defence in United Kingdom. The authority is responsible for evaluating bids, awarding the contract, and managing performance.

What type of contract is this?

This is a Services contract in the Architecture & Engineering Services sector. The classification helps bidders match the opportunity to their qualifications and registered scope of supply.