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QES Ltd

QES Ltd

QES Ltd is an independent industrial electronics design and repair house in Aylesbury, Buckinghamshire, specialising in switch-mode power supplies, rectifiers and IPL chargers. Certified to ISO 9001:2015 for the design, manufacture, supply and repair of electronic equipment, the company repairs power electronics from 40 W to 2 kW, designs fit, form and function replacements for obsolete power supplies, and offers low-volume contract manufacture of surface-mount and conventional circuit boards, cable looms and complete box builds with functional testing. QES is on the UK MOD contractors list and serves military and aerospace, medical, rail, energy, communications, industrial and commercial customers. The company has traded since 1990.

Box Build Assembly Buckinghamshire Cable & Wire Assembly Design & Engineering England
Repair & Rework
Certifications
ISO 9001
Services
Design Assembly Repair/Rework Obsolescence Management Cable Assembly Box Build PCB Reverse Engineering PCB Testing
Assembly Type
Surface Mount Thru Hole
Testing
Functional Testing
Order Type / Volume
Low Volume
Box Build Capabilities
Enclosure/Chassis Assembly Final Product/System Test
Cable & Harness Assembly Capabilities
Wire Harness Assembly Discrete Cable Assembly
Industries Supported
Aerospace and Defense Industrial Commercial Medical Railway Technology Energy Telecom
Visit Website Send Email
Unit 21, Space Business Centre, Smeaton Close, Aylesbury, Buckinghamshire, HP19 8FJ
Last Updated
2026-10-02
QES Ltd
google maps embed
Company Registration Number 02555706
Companies House URL
Verification History

2 Oct 2026 — Scheduled verification (Lite). No changes.

12 Sep 2026 — Scheduled verification (Max). Added surface-mount and through-hole assembly, cable assembly, box build, reverse engineering and testing services, functional testing, and medical, rail, energy and telecom sectors served; LinkedIn and X profiles added.

12 Sep 2026 — Scheduled verification (Lite). No changes.

6 Sep 2026 — Listing added to EMS Directory, pending verification checks.

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