As Callen-Lenz continues to grow and push the boundaries of technology across crewed and uncrewed aviation, we owe our success to the strength and commitment of our team, who deliver world-class innovation, services, and products to support the future growth of the company.
Our history
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2007
Callen-Lenz was founded in 2007
Callen-Lenz has its roots in aviation consultancy. Early focus was the commissioning and management of uncrewed flight operations services, with the founders and senior team bringing a wealth of crewed aviation experience as aircrew, engineers, and innovators. -
2010
World leader
In 2010, Callen-Lenz became a world leader in the breakthrough technology of drone-based photogrammetric data capture. This pioneering remote sensing service uses in-house designed aircraft with modified sensors to fly over forests and crops gathering 3D and multispectral data. Innovation and pioneering technology have been the hallmarks of Callen-Lenz since the start. -
2012
Supporting the UK MOD since 2012
Since 2012, Callen-Lenz has pioneered Beyond Visual Line of Sight (BVLOS) testing and evaluation as a commercial operation, supporting trials for the UK MOD and commercial customers. Trials services then grew to encompass regular provision of BVLOS counter-UAS target services and flight testing of large military and commercial UAS. -
2013
Sky Circuits
In 2013, Callen-Lenz acquired SkyCircuits, which became a wholly owned subsidiary of Callen-Lenz. SkyCircuits develops high-integrity autopilots for use in crewed and uncrewed systems. SkyCircuits launched the first autopilot/mission management system, SC2, for use across the civil and defence markets. Since 2013, the SC2 has architecturally evolved, leading to the design and manufacture of the SC3 in 2019, a more powerful and sophisticated autopilot. SkyCircuits has produced hundreds of autopilots since 2013 and is best-in-class, readily tailored and integrated into a wide variety of platform configurations. -
2019
Koios has achieved over 1000 hours of operational flying
In 2019, Callen-Lenz started the design, development, and manufacture of our key UAS product, Koios, in our UK facility located in rural Wiltshire. Koios is a medium VTOL UAS which offers fully autonomous operations providing strategic ISR capabilities with a tactical footprint. -
2023
40% year-on-year growth since 2019
Callen-Lenz goes through a period of rapid growth. Growing 40% year-on-year since 2019. The company expanded from a small to a medium sized company with the number of Callen-Lenz employees increasing from 46 to over 100 between 2020 and 2022.
Over seven years, Callen-Lenz supported numerous UK and overseas organisations in their UAS, RPAS and EVTOL/PAV developments through design and prototyping services, all aspects of design and safety analysis and crucially, in the development of novel flight control and mission management avionics solutions.
Callen-Lenz has served the UK MOD since the company's beginning, providing trials, research and development services and, more recently, UAS products. -
2025
From collect to effect: Driving mission success through innovation and partnership
Callen-Lenz grows to 250+ employees, delivering operationally proven platforms and services for civil and defence partners globally.