Our Leaders

Jonathon Wroe

Managing Director

Jonathon joins ST Green Power as Managing Director in 2024, responsible for leading our award-winning organics recycling service and growing network of solar, wind and hydro assets, while shaping the strategic focus for the business as we enter the next growth stage.

Having held multiple leadership roles in Severn Trent over the last 30 years, Jonathon has extensive experience in operations, specialising in Bioresources and renewable energy. He led the Severn Trent and Hafren Dyfrdwy Operational Control Centre teams and oversaw the delivery of industry-leading performance. Jonathon also has a track record in driving large-scale change and managed a number of transformation programmes that helped improve business performance.

Andrew Simm

Operations Director

Having worked in the Renewable Energy industry for more than 11 years, Andrew brings a wealth of experience to his role as Operations Director. Responsible for all operational aspects of the business and delivery of its strategic aims, Andrew leads a team of engineers and operatives delivering daily food waste and renewable energy solutions.

Before joining ST Green Power in 2022, Andrew previously worked as part of the commercial team at Agrivert, where a key part of his role was exploring development opportunities across the world, including China, Hong Kong, Canada, New Zealand, and the UK.

Mark Barnfield

Commercial Director

With over 25 years of experience in the waste and environmental sector, Mark has a distinguished record of driving commercial growth. As the Commercial Director for ST Green Power, he oversees our commercial and public sector offerings, ensuring the delivery of high customer satisfaction and value while maintaining commercial sustainability.

Mark began his career at the Environment Agency in water and waste regulation roles. He then advanced to senior commercial positions with leading environmental service providers such as Veolia, Serco, and FCC Environment. Additionally, he served as a Managing Consultant at Navigant, where he provided expert guidance on large waste and environmental service procurements.

Farryad Ishaq

Strategy & Business Development Director

Farryad joined ST Green Power in 2014, however his passion for waste recycling and renewable sources began at university when he completed a PHD in Anaerobic Digestion. While there, Farryad was sponsored by Severn Trent to complete doctoral research on the subject, which lead to him starting work at the company as an Anaerobic Digestion Specialist.

In that time, he has worked in several key roles across the company and has been instrumental in the growth of the Green Power business. Farryad moved into the role of Strategy & Business Development Director in December 2021 and is responsible for driving business development and growth.

Troy Tucker

Finance Director

Troy joined ST Green Power in 2024, bringing over 30 years of experience in senior financial leadership and management. As Finance Director, he is responsible for developing the financial strategies to support our operational and commercial strategic goals.

Troy’s experience spans across a variety of sectors including construction, repair and maintenance, and breakdown assistance, having previously worked for the RAC, Interserve and Homeserve. Troy is a Chartered Accountant with an early career background in audit, assurance and corporate finance.

Gemma Mcmullen-Leach

HR Business Partner

As HR business partner, Gemma in an integral part of the leadership team at ST Green Power. Passionate about people development, Gemma works alongside our leaders, teams, and key stakeholders, to shape and implement people strategies and programmes that support the development of every member of the Green Power team and strengthen our business, both now and in the future.

Gemma started her HR career working for Sainsburys, where she worked in a variety of roles for 16 years. She then moved into the Aviation industry and then onto the Automotive industry, where she worked for YASA – a manufacturer of motors for electric vehicles, before joining ST Green Power.

Naomi Thomas

Assistant to Directors

Naomi joined the ST Green Power team in 2020 and currently provides executive support to several of our directors, as well as coordinates some of our key projects and events throughout the year. Naomi has more than 10 years’ experience supporting directors and senior managers over various industries.