Meet the team


  • Plumis Founder William Makant

    William Makant

    Chief Executive Officer (CEO)

    William is a mechanical engineer & technical lead at Plumis. William holds an MBA from Imperial College. He has led to a successful conclusion a number of fire suppression R&D projects with Innovate UK backing which has led to the Queen’s Award for Enterprise in Innovation – the UK’s highest accolade for business success. He is a member of the FIA/BASFA Watermist technical committee that contributes to the British Standards.

  • Plumis Founder Yusuf Muhammad

    Yusuf Muhammad

    Chief Design Officer (CDO)

    Yusuf is a co-inventor of Automist. He has an Honours Masters degree in Engineering and a double Masters in Innovation Design Engineering. He has won numerous design awards for a host of innovations across a number of industries including the James Dyson Award, the Toyota IQ Design Challenge & Transport Design of the Year by the Design Museum to name a few. He also starred in the BBC 2 Show 'The Big Life Fix'.

  • Plumis Staff Glenn Hayward

    Glenn Hayward

    Chief of Operations (COO)
    Glenn is a graduate of the University of Manchester and has close to thirty years of experience working on the new product introduction and the operations side of high-tech businesses including everything from  Standard Integrate Circuit (IC) products to smart meters. He has expertise in setting up world-class quality, reliability and manufacturing facilities, is a father of three and is an experienced and keen ocean yachtsman. 
  • Plumis Staff Elisha-Kay Gross

    Elisha-Kay Gross

    Operations Manager

    Elisha-Kay has over 15 years of experience in finance which includes banking and accounting, 10 years of experience in organizational development and various management roles. She holds a degree in finance and is currently pursuing an MBA in business with a certificate in financial planning. Elisha-Kay enjoys spending time with her two children, yoga and swimming.

  • Plumis NED Peter Cowley

    Peter Cowley

    Non Executive Director

    Peter is a Cambridge University Engineering and Computing graduate and fellow of the Judge Business School. He’s run technology and construction businesses for over three decades and is involved in charity and social enterprise governance, as chair and treasurer, on many trustee boards. Peter founded and runs the Martlet start-up investment fund in Cambridge and has invested in over 30 start-ups. He is on the board of seven of these, including Plumis. Peter enjoys fine dining.

  • Plumis Staff James Munger

    Dr James G. Munger

    Fire Protection Associate

    James “DOC” has been active in the field of fire protection for over 40 years, beginning his career as a firefighter before becoming a Deputy State Fire Marshal for the State of Alabama. He has been an active member of the Adjunct Faculty of the National Fire Academy in Emmitsburg, Maryland for 33 years, developing and instructing courses in fire protection, code enforcement and fire investigation.

  • Plumis Staff Jinwen Cen

    Jinwen Cen

    Product Development Engineer

    Jinwen is an experienced engineer with a demonstrated history of working in the mechanical engineering. He is skilled in R & D, quality management, root cause analysis and project management. He has strong product development professional with a master's degree focused in mechanical engineering from RWTH Aachen University. He likes to travel and make friends.

  • Plumis Staff Tony Greenwood

    Tony Greenwood

    Bookkeeper / Financial Controller

    Tony Greenwood was born in 1958 and lives in Surrey. He has been a Management Accountant throughout his career and has held a number of financial controller roles in SME's. He has been a Plumis shareholder since the first round of external investment.

  • Plumis Career Plumis Stormtrooper

    Plumis Stormtrooper

    Top talent

    We’re always on the lookout for outstanding and unique individuals who share our values. Being a part of Plumis requires an independent streak and creative collaboration skills to help us make our products the best they can be. We want to find the best and we move fast, so if this sounds like you, send your CV to recruitment@plumis.co.uk