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Stefan Zeller
Managing Director

Phone:+44 (0)203 5899 401
E-Fax:+44 (0)207 117 1664
E-mail:stefan.zeller@optigreen.co.uk

Stefan has consolidated knowledge of applications engineering during 6 years working at the Optigreen headquarter in Germany. Here he gained several years of experience in the technical department being involved in product development. He was also responsible for technical advice, additionally working in export. In 2009 he launched Optigreen Ltd in the UK.
Nick Day
Technical Sales Manager

Phone:+44 (0)203 5899 403
E-Fax:+44 (0)207 117 1664
E-mail: nick.day@optigreen.co.uk

Nick has worked in the roofing industry for over 25 years and has gained wide experience in technical sales, sales management and contracting. He has worked with Optigreen systems for several years, initially for an external distributor, and more recently directly for Optigreen. Nick is a member of the Institute of Roofing (M.I.o.R).
Nafisa Abdulkadir
Sales and Office Administration

Phone:+44 (0)203 5899 400
E-Fax:+44 (0)207 117 1664
E-mail: nafisa.abdulkadir@optigreen.co.uk

Nafisa joined our team from Switzerland in December 2012. In her previous position as a Technical Specialist at an IT solutions distributor she was responsible for all aspects of the order process as well as supporting the sales team.
Nikki Bell
Sales and Office Administration

Phone:+44 (0)203 5899 400
E-Fax:+44 (0)207 117 1664
E-mail: nikki.bell@optigreen.co.uk

Nikki previously worked as a Directors PA for an Environmental Building Design Consultancy where she became interested in the ethos behind green roofs. She joined Optigreen in November 2012 and lives locally