The board

Keith Guy - Chairman
Mark Wells Non-Executive Deputy Chairman
Costas Pantelides - Managing Director
Steve Sanderson - Executive Director
Bernie Waldron - Non-Executive Director
Robert Whitby-Smith Non-Executive Director

Keith Guy FCGI, FREng, CEng, CSci, CEnv, FIChemE, ACGI, DIC Chairman

Following a 28-year career with Air Products which included both engineering and commercial Executive Management roles, Keith Guy is now Chairman of Process Systems Enterprise Ltd, Impact Faraday Ltd and Process Integration Ltd, a Director of Spiritus Consulting Ltd, and a non-executive director of Webaspx Ltd.

He is a visiting Professor of Chemical Engineering at University of Bath and at Imperial College London and plays a full part in professional and public life; he is recent past Technical Vice-President of the Institution of Chemical Engineers and is currently a member of the Engineering Policy Board of the Royal Academy of Engineering, Chairman of the Exxon Teaching Fellowships Scheme and a Trustee of the Institution of Chemical Engineers Benevolent fund. He plays a regular part in industry-academic-government committees with a particular focus on sustainable development activities and low carbon energy systems.

Keith Guy Mark Wells Non-Executive Deputy Chairman

Mark Wells is a Non-Executive Director of Kofax plc, a global leader of Intelligent Capture & Exchange solutions and a Non-Executive Director of TruthTek Limited a start up Company focussed on Deception detection. Mark was also Non-Executive Deputy Chairman of Coda plc until its successful sale for £160m to Unit 4 Agresso NV in 2008.

Previously Mark was Chairman and CEO of Image Metrics Plc, an image analysis software company. Prior to this he was Chief Operating Officer for Brainpower NV, a supplier of advanced financial analytical software and Managing Director UK and Vice president of Continental Europe for Dun and Bradstreet Software.

Costas Pantelides Managing Director

Costas Pantelides has been the Managing Director of PSE since 2005. He was one of the original founders of the company, and has also served as its Technology Director since the establishment of the company in 1997.

Costas holds B.Sc.(Eng.) and PhD degrees from Imperial College London and an MS degree from MIT. He is the author of over 100 scientific papers on the design and implementation of general-purpose process modelling tools, numerical methods for large-scale simulation and optimisation, and molecular modelling. He is currently also a part-time professor of Chemical Engineering at Imperial.

Costas has more than 25 years' experience in process modelling technology, having played a leading role in the development of the gPROMS and SPEEDUP^® technologies. His contributions to process systems engineering were honoured by the 1998 Beilby Medal and Prize, awarded jointly by the UK Society of Chemical Industry, the Royal Society of Chemistry and the Institute of Materials. In 2007, he led the winning team for the Royal Academy of Engineering MacRobert Award, the UK's most prestigious prize for engineering innovation.

Steve Sanderson Executive Finance Director and Company Secretary

Steve Sanderson qualified as a Chartered Accountant with PricewaterhouseCoopers and has extensive experience at executive director level in the Information, Communications and Technology sectors. He was a director of VEGA Group Plc from 1994 to 2000 and of European Telecommunications & Technology Limited from 2000 to 2007.

His background includes supporting the financial management and control of fast-growth companies, public flotations, fund raising, acquisition and disposal activities. He is also currently a non-executive director of Triad Group Plc.

Bernie Waldron Non-Executive Director

Bernie Waldron has more than 25 years' international leadership experience and a proven track record of success in competitive and changing markets. He spent two years in Copenhagen as CEO of the Maersk Data Group, acquired by IBM in 2004, a group of 4000 employees across 30 companies with turnovers ranging from $5m to $250m. Prior to that he ran IBM's Industrial Sector division for Europe, Middle East and Africa. In the late 1990s, at the height of the tech stock boom, Bernie was Director of Corporate Strategy based at IBM's global New York headquarters. Bernie joined IBM in the UK in 1979 as a Systems Engineer. He has held professional and management positions across a range of disciplines including technical, sales and finance and has a balance of P & L management, strategic, acquisition, change management, business development, client relationship, sales leadership and complex deal skills.

At the beginning of 2007, Bernie embarked on a part-time portfolio career, working with a small number of organisations on a non-executive basis. His current responsibilities include being a director of Kneip, a Luxembourg-based service provider to the global investment fund industry and a Trustee of the Venture Partnership Foundation, which supports rapidly growing entrepreneurial charities.

Bernie has an MA in Mathematics from Churchill College, Cambridge. He is married with three sons, born in 1994, 1996 and 1998. He is enthusiastically involved in most sports, where possible as a participant, but increasingly, as a spectator.

Jeremy Asher Robert Whitby-Smith Non-Executive Director

Robert Whitby-Smith is a partner of Albion Ventures LLP, a leading independent private equity business, managing over £200 million across seven Venture Capital Trusts. Albion was formed by the Close Ventures' management team to acquire Close Brothers Group PLC's venture capital business, Close Ventures Limited.