Our People

Russell Smith – Managing Director

Russell founded Parity in 2005 whilst carrying out his own deep eco-renovation – work which inspired the later development of the our renowned Home Energy Masterplan and CROHM stock assessment advice services. Russell is Chartered Civil Engineer, a respected retrofit trainer, adviser to The Retrofit Academy, served on the Buildings Working Group of the Green Construction Board, and is also a Director of RetrofitWorks co-operative.

Chris Newman – Commercial Director

Chris has ten years of experience with large professional services and investment banking environments in the City. More recently he undertook a Masters degree covering Environmental Architecture the science of how buildings work. Both of these have left him well placed to ensure our products are fit for purpose and good value. He leads on our Home Energy Masterplan development and delivery and Business Development with our CROHM Online service.  He is also a Non-Exec Director of Ecology Building Society.

David Shewan – Technical Director

David has been working in the domestic energy sector since 2002, and has particular experience of technical analysis and managing installation of energy saving measures. He joined Parity in 2008, and has been responsible for the development of the Parity Masterplan software and the CROHM Online tool. David currently leads our strategic housing stock assessment services.


Alaine Duffy – Data Manager

Alaine’s main responsibilities are the development and delivery of Parity’s strategic housing stock assessment services. She completed a Masters in Environmental Management in 2009, and had previously worked for the Building Centre as well as for 7 years on NASA’s X-ray observatory satellite, Chandra, where she gained vast experience of technical data analysis and database management.


Megan Williams – Project Manager

Megan joined Parity Projects in 2012 after completing a MSc in Climate Change Management. She has a background in Environmental Science (BSc) and worked for the Electrical Contractors’ Association (ECA).  She brings a wealth of knowledge in low carbon government policy in buildings services, and experience in advising contractors on energy efficiency and environmental management.  Megan is the lead Project Manager on the exciting RetrofitWorks cooperative and works across Parity Projects’ business streams to lead implementation of project work.

Jo MarshallJo Marshall – Energy Analyst

Jo joined Parity as an energy analyst in early 2015, working mainly on our CROHM stock assessment service. She has completed a degree in Ecology and Conservation (BSc) at the University of Sussex, having used various computer modelling techniques for her dissertation. She also has experience of managing data for a large environmental conservation charity.



Devin Snider – Project Manager

Devin manages projects from a critical skill base, qualifying as both a Master Carpenter in his native Canada, and having MSc in Sustainable Architecture from the Centre of Alternative Technology, N Wales.

He is one of the country’s first fully
qualified Retrofit Coordinators.



Richard Stewart Project Manager

Richard Stewart – Project Manager

Richard is a qualified Chartered Surveyor leads on the practical delivery of our retrofit projects, through design and specification, procurement and programme management, Richard has worked as a project manager for more than 12 years. Prior to working with Parity projects Richard worked with some of the leading London-based property consultancies where he gained huge experience in delivering effective construction projects.