Dr Fenn with his wife Brenda formed their own company in 1991 called FlowTech Design Limited. The company specialises in the computer simulation of the injection moulding process and is founded on Clive's engineering materials knowledge and experience gained in the plastics processing industry since graduating from UMIST with a BSc in Polymer Science & Technology (Physics) in 1973 and a PhD in 1976.

Clive Fenn, as a professional engineer, has been an active committee member of the Manchester Polymer Group of the Institute of Materials, Minerals and Mining in various capacities since 1976. He is currently Vice Chairman of the group and has special responsibility for PR and for many years has been a major contributor in the organisation and success of the Young Person's Lecture sponsored annually by the section. Between 1993 and 2000, Clive was the North West Regional Representative of the Institute of Materials and acted as the link between members and industry in the North West and headquarters in London.

In a wider engineering role, Clive is a Neighbourhood Engineer. Outside of the professional area, since 1992, Clive has been a Governor at a Primary School serving terms as Vice Chairman and Chair of Governors, recently broadening his experience in this area he has become a Governor at a Church of England Secondary School.

In 1995, Dr Fenn, became a voluntary helper with a local Scout Group, assisting in the first instance with the Cub Pack and latterly as a warranted Assistant Scout Leader. Similarly,

Clive became actively involved in a Bolton cricket club in 1993, assisting with coaching and practice sessions and subsequently, took up the reigns of Junior Team Manager.