Shaping the Future of Aerospace

Callen-Lenz is a market-leading UK SME delivering operationally proven capabilities, bespoke platforms, rapid prototyping and avionics, as well as complementary technical consultancy for uncrewed and crewed aviation.

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Callen-Lenz designs, develops, and manufactures novel Uncrewed Aerial Systems (UAS) in-house, providing cutting-edge capabilities to suit customer mission requirements. We harness the latest, state-of-the-art technologies, which enables us to deliver disruptive solutions at pace for uncrewed systems that require high levels of functionality, availability, and safety.

We have the ability to draw experience from the design, manufacture, and operation of multiple aircraft types which enables us to define, develop, and deliver innovative technical solutions for our customers. We are laying the foundation for transformational capabilities across the industry, pioneering the future of autonomous technology.

A drone in flight viewed from below


We are specialists in the rapid development of platforms including multi-rotor, fixed-wing, electric, hybrid, internal combustion and jet. We have multiple platforms under development, in house to support evolving customer requirements, ranging from micro UAS to Medium Altitude Long Endurance (MALE) aircraft.

Drone rotor blades


SkyCircuits is a wholly owned subsidiary of Callen-Lenz, specialising in the design and development of high integrity, flexible avionics, autopilots and mission management systems for uncrewed aviation.


Operational Services

We have a history of delivering reliable, repeatable, international UAS service operations since 2008. Our team of expert test pilots have extensive knowledge and passion for aircraft operations, with expertise ranging across rotary wing, and fixed wing aircraft across civil and military applications.

An engineer assembling a drone

Technical Services

Bringing novel concepts to life, our consultancy work brings ground up, in-house development to projects from sub 10 kg to 1800 kg to deliver uncrewed autonomous systems technology for clients internationally. We will provide up-to-date advice and support to clients that seek experienced independent input from qualified staff.

An engineers using computer aided design software

Launch your career to new heights

If you're looking to join a company that values creativity, collaboration, and a passion for the future of UAS technology, we want to hear from you.

Workers assembling components

Updates and News

Callen-Lenz Spotlight Series

03 November 23

Callen-Lenz Spotlight Series

Our Employee in the Spotlight series is a chance to highlight the impact our tea

HR Department in Focus

19 October 23

HR Department in Focus

Our Department in Focus series shines a light on the departments which contribut

Koios with our class of 2023 interns

30 June 23

Class of 2023

Congratulations to the class of 2023 interns! As Emily, Joe, Dan and Ottilie’s y

Miles Hodgson

26 May 23

Callen-Lenz Spotlight Series

Our spotlight series shines the light on our talented workforce. Today we want t


Cyber Essentials
ISO 9001
Made In Britain