Tetronics Team

Our team

Graeme Rumbol

Chief Executive Officer

An experienced leader with a track record for profitable growth in both large & SME businesses delivering high value complex systems and solutions globally. Graeme has over 31 years’ experience in the Defence & Automotive Industries. He is a qualified Electronics Engineer and has held Senior Technical, Business Development, Programme Delivery and General Management positions with Major UK and US Defence Prime Contractors and Engineering Technical Consultancy companies. Graeme has successfully conducted business in most regions around the world delivering high value complex Systems & Services.

Dr David Deegan

Chief Technical Officer

As Chief Technical Officer for Tetronics, David oversees all technical aspects of client project delivery, operational permitting and ongoing support.  David is also responsible for technology research and development as well as patent portfolio management.  With a commercial and regulatory focus, particularly in the areas of resource recovery, David was sponsored by Tetronics to obtain his PhD in plasma waste processing in 2003. David is a Chartered Environmental Engineer and a Fellow of the Institute of Materials, Minerals and Mining.

Dr Tim Johnson

Technical Director

A technical director with a plasma and engineering focus particularly in the areas of waste reuse/recovery and clean heating. Tim obtained a PhD from the University of Birmingham in 1990 before spending eight years as a research fellow operating and coordinating the work of the university’s large plasma melting facility. Since joining Tetronics, he has focused on technology development and the delivery of commercial plants. Tim is a Fellow of the Institute of Materials, Minerals and Mining.

Gary Hills

Finance Director

A qualified financial professional having completed articles with Deloitte’s. After leaving practice, he has worked primarily in specialised manufacturing and/or contracting companies. Gary is a member of the South African Institute of Professional Accountants and the Institute of Directors

Gary Risk

Head of Operations

Gary is an experienced Operations Manager with a proven record for delivering Technically Complex high value projects gained over 25 years in the Commercial Automotive and Defence sector.  Gary has held senior Manufacturing & Supply Chain Management positions with both SME & Global Companies, and is a member of the Chartered Institute of Purchasing & Supply.  Key areas of knowledge and experience Include: Managing multisite multi discipline Integrated Project Teams, for Manufacturing & Assembly, Supply Chain & Inventory Management, Quality, HSE & Facilities Management activities.

John Conway

Head of Project Management

John is an experienced Programme Manager having spent over 20 years in the Defence Industry working for a number of major UK Defence Prime Contractors and Engineering Management Consultancies. John has an Honours Degree in Electronic and Telecommunications Engineering and has held various Technical Management, Sub Contractor Management and Senior Programme Management positions throughout his career.

David Holman

Purchasing Manager

A practised purchasing manager with a deep understanding in constructing commercial proposals, David is key in the evolution of a waste recovery plant project, encompassing purchasing of materials as well as coordination of export requirements and overseeing all requests for spares and service. David is a qualified auditor for both ISO9001 and ISO14001 quality systems, and holds both Foundation and Professional stages from the Chartered Institute of Purchasing & Supply

Les Liddiard

VP Asia, Tetronics International

A mechanical engineer by profession Les has over 20 years of experience with high temperature plasma applications, most significantly in the field of high temperature extractive metallurgy. His experience encompasses the design, development, application and commissioning of plasma systems worldwide. Specialisation in the Asia Pacific region, establishing Tetronics as the leading supplier of high temperature plasma technology in Japan and Korea, led to Les adopting the role of Vice President Tetronics Ventures Asia in 2007.

Gillian Holcroft

VP North America, Tetronics International

As Vice President North America Gillian is responsible for leading the business development efforts in North America. Gillian obtained her Bachelors and Masters degrees in Chemical Engineering from McGill University and has over 30 years experience in Advanced Technology including plasma processing, Environmental Services, Mining and Metallurgy, US Department of Defence as well as International Trade.