An engineer working on a drone

About Us

We are an ambitious company with the goal of becoming the UK’s centre of innovative capabilities across UAV design, development, and testing in addition to becoming the leading expert in rapid platform development, allowing us to deliver solutions tailored to every customer’s needs.


Team of:
150+ employees

UK Sites:


Shaping the Future of Aerospace

What people say

Callen-Lenz have used UK DSE’s Export Support Team to showcase their KOIOS on numerous defence events, both in the domestic and international spheres. It always attracts a lot of interest in the export market. In addition, UK Defence Attachés with global reach have received an introduction to the capability with open arms. The unique design and obvious utility of the system makes it a real eye catcher at these events drawing in the crowds including Government Ministers and International Military Delegations.

WO2 Dave Cree,
Artillery UAS Advisor, Export Support Team

I’m delighted that we have been successfully awarded a RAeS Bronze Medal for our joint work on Crewed Uncrewed Teaming. Many thanks for your support with this work and the associated submission. Congratulations to the Callen-Lenz colleagues who worked collaboratively with the Leonardo engineers to deliver the successful CUC-T demonstration for AWE-19.

Andy Merrick,

Supply Chain

Manufactured in the UK

We are proud of our contributions to the technology industry and the local Wiltshire economy. We take pride in being an independent UK company and understand the significance of relationships and collaborative knowledge sharing to push the boundaries of aviation.

Our Uncrewed Aerial Vehicles are 100% assembled at our Wiltshire facility with up to 70% of components sourced within the UK from British suppliers. We operate on a carefully selected supply chain that is built on strategic relationships, transparency, sustainability, and quality to achieve ongoing world class supply chain excellence and our ability to scale at operational pace is world class.


We source our components from local suppliers to ensure we maintain a low carbon manufacturing footprint by using suppliers that are predominantly based in the UK and EU, with a strong focus on last mile logistics.

Strategic Partnerships

Our strategic partnerships enable us to develop best-in-class solutions. We recognise that for our pioneering technology to be at the forefront of the market, it is critical that technological advancements are made throughout both our local and global supply chain.

Quality Control and Compliance

We follow a strict quality control and audit process to ISO9001 and are JOSCAR approved.

We have a UK first approach to our sourcing of components and aircraft development.

Manufactured in the UK - up to 70% UK sourced or manufactured

Key Stakeholders


We are a key supplier and advisor to UK government across the UAS industry since 2012 and are recognised as a key integrator and subject matter expert in the UAS ecosystem.


We work closely with several higher education establishments providing consultancy, knowledge transfer, career and development opportunities to support the future of engineering.

Fly the flag for technology in Wiltshire

Based in rural Wiltshire, Callen-Lenz is transforming the local area into a hub of cutting-edge innovation, providing opportunities across a wide range of disciplines in our local community.

Our History

Callen-Lenz brings 15 years UAS experience across the military and civil domains.

Computer Aided Design software on a monitor