William McOnie
Managing Director, Semmco Group
Will is Managing Director for the Semmco Group, reporting directly to the HAKI Safety Board, and is responsible for Semmco UK, Semmco Inc and Semmco DWC. Will joined the company in 2014 as part of the sales team before relocating to Texas as part of the team who established our US operation. Will returned to the UK at the end of 2020 when he assumed the role of Managing Director for the UK business before taking on the role across the whole group following the sale to HAKI Safety in 2024. sales@semmco.com
Andrew Walling
Senior Sales Manager UK & Europe
Andrew manages our UK & European sales, he is an experienced Sales Engineer, International Business Development and Sales Manager who has been involved in a wide range of safety related products across his career, most recently in the aviation and rail industries.
Andy Redmond
Operations Manager
With a 25-year career in manufacturing, Andy is responsible for the effective operation of Semmco UK. He oversees the Purchasing, Production, Machining and Product Support business functions. Working closely with each head of department, Andy drives efficiency and fosters team spirit.
Jeffrey Wright
General Manager - USA
Jeffrey joined the Semmco Inc. team in February 2021 after a 16-year career manufacturing sheet metal within the mobile home and cargo trailer industries. He runs our facility in Arlington, Texas and is responsible for all manufacturing projects, overall day to day activities and the safety of his team.
Luke Wilson
Production Manager
Luke is the head of the production department at Semmco, ensuring quality, efficiency and consistency from the team who manufacture and assemble our products. He has an extensive background in manufacturing both in machinery and running production teams.
Harry Charles
Senior Design Engineer
Harry joined Semmco in 2022 as part of the design team, bringing 21 years of experience in mechanical design and engineering. His career spans a wide range of industries, including Construction, Metal Fabrication, Furniture Manufacturing and Design, FMCG, and Industrial Design.
Holding an HND in Industrial Design along with qualifications in Mechanical Draughting, Harry is one of three senior engineers within the company. Since joining Semmco, he has contributed to major projects such as the "Virgin Engine Staging Project" and the redesign of the "PAX Platform System", while also driving initiatives in value engineering and innovative design approaches.
Steve Jeynes
Senior Design Engineer
Steve joined Semmco in 2025 as a Senior Design Engineer, bringing 13+ years in precision engineering across high pressure automotive and military work. He has led a design team delivering complex tooling and processes for major OEMs and global manufacturers.
In 2021 he won and delivered EV termination tooling for the £2.4m AMG One for Raffenday. Due to the cost of these limited runs, this led him to design an industry first universal cut and destroy crimp press add on, holding automated outputs on spec to ±0.03 mm and ensuring 100% compliant runs.
Harry Lee
Senior Design Engineer
Harry joined Semmco in 2025 as part of the design team, bringing with him over 11 years of experience in mechanical design. Starting his career as an apprentice, he has built a strong foundation in engineering and now holds an HND in General Engineering. With a background in the lift, rail, sieving, and filtration industries, Harry offers a broad range of expertise to the role. His main responsibilities include developing bespoke concepts from customer briefs, creating and maintaining detailed drawings, and supporting the manufacturing and sales team.
Diane Dawkins
Finance Manager
Diane manages the finance department for Semmco & Semmco LPS in the UK as well as Semmco DWC in UAE. She started at Semmco in 2016 following previous financial management roles at Burhill Estates for 11 Golf Centres & the Guinness Family Estates and the University of Roehampton in London.
Jackie Connelly
Purchasing Manager
Jackie is responsible for the efficient and timely procurement of all the components required to produce the extensive range of equipment manufactured by Semmco. She is responsible for all the components purchased for the UK and DWC operations and also supports the purchasing team in our US facility. Jackie has been with Semmco for several years and has worked in different departments and so she has extensive knowledge and understanding of the business and our customers' needs.
Carl Bennett CEng MIED
Quality Manager
Carl is a professional Chartered Engineer with over 25 years experience across Aerospace, Rail Ports, PPE and Renewable Technology. He has worked with Semmco since 1996 in various key roles across the business and is responsible for managing the quality systems operated across the business.
Graham Connelly
Production Supervisor
Graham is responsible for the manufacture and testing of our gas operated aircraft ground support equipment e.g. oxygen and nitrogen trolleys, nitrogen walk around charge kits etc. Graham joined Semmco in 2018 initially as a Production Technician and took on the position of Gas & AGSE Production Technician in July 2020.
Adam Chance
Product Support Team Manager
Adam is responsible for the Product Support Department, working with our customers once our products have been supplied and installed. He supports our field service engineers, managing installation and servicing of our equipment as well as overseeing our customers' maintenance contracts. Adam joined Semmco in November 2024.
Rob Currey
Service Engineer Supervisor
Rob joined Semmco in 2007 in our production team. He now heads up our experienced field and service team providing installation, servicing and maintenance for Semmco products on site with our aviation and rail customers.
Nina Horobin
HR Manager
Nina provides HR, Training and Recruitment support for Semmco enabling the business to benefit from her advice and experience as and when we need it. Nina worked for Semmco for several years before founding her own, independent consultancy in 2017 so she knows the business exceptionally well.
