Tesni Homes

The Team

Tesni People

James Hennie

James Hennie BEng (Hons)

Managing Director

James is a founder member of Tesni since its inception in 2006, he continues to get involved in all Tesni projects taking a ‘hands on’ approach but is particularly focused on the construction side of the business. James has over 25 years experience in the energy and development sectors, with roles in renewable energy development, housing development and power station engineering and operations.

Gerry Jewson

Gerry Jewson


Gerry established Tesni in 2006. He has worked in the renewables and sustainable development sector since 1993 during which period he established his own company, West Coast Energy; responsible for developing over 650MW of renewable energy capacity in the UK. The business was sold in 2014. Gerry is also a member of the Welsh Government Energy and Environmental Sector Panel.

Sarah Smith

Sarah Smith

Financial Director

Sarah joined Tesni in 2014 following a career in the electricity supply industry where she had held senior financial positions in FTSE 100 companies. Sarah is responsible for all aspects of finance at Tesni and is a fellow member of the Chartered Institute of Management Accountants.

Sam Leuty-Milner

Sam Leuty-Milner Assoc RTPI

Planning and Development Manager

Sam graduated with a masters degree in Planning and Urban Design from the University of Sheffield before joining Tesni in 2014. Sam now leads the land acquisition and planning side of the business. Sam has previous voluntary experiences in public and private sector organisations, including helping to build a school in Madagascar. You can read about his trip in our News section. Sam is also an active member of the RTPI North West’s Regional Activities Committee and the chair of the Education and Careers task group, championing the profession of planning and engaging with education facilities throughout the region.

Seren Whitley

Seren Whitley


Seren graduated from the University of Chester in 2018 with a degree in Geography. Seren joined Tesni in 2019 as a Planning and Development Assistant, supporting the planning and land team with site identification and acquisition as well as assisting with new and ongoing planning applications. More recently, Seren has also been working on identifying and appraising sites on the renewable energy side of the business, with a specific focus on Battery Energy Storage Sites.