- Welcome to Retrofitworks
- 0330 123 1334
- info@retrofitworks.co.uk
Meet the Team
Join us
The people behind RetrofitWorks success
At RetrofitWorks, our success is driven by a diverse and dedicated team of professionals who are passionate about sustainability and energy efficiency. Our cooperative thrives on the expertise, creativity, and collaboration of individuals from various backgrounds, all working together towards a common goal: transforming homes and communities across the UK into more energy-efficient and sustainable spaces.
10+ Years
Of Retrofitting Experience
2013-2025
Starting out Retrofitworks
Meet Simon Evans
Managing Director
Simon is a chartered construction manager with nearly 25 years of experience in the sustainable energy industry, the majority in the domestic retrofit space.
Starting at the front line of energy efficiency advice all those years ago, Simon has worked for local and regional authorities as well as on the contracting side to give a wide ranging and experienced view of how the energy landscape, with all it’s different parts and competing priorities fits together (or sometimes doesn’t!).
Simon has overseen local area-based insulation projects in the private sector, £12.5m estate-wide low rise retrofit projects for social housing, cross-sector energy saving partnerships, project management on low carbon skills and employment research, low carbon finance, CHP / district heating capacity building, technical and economic analysis of the low carbon neighbourhoods. With extra non-domestic experience in solar farms, commercial solar and grid batteries as well as ongoing involvement as board level on community energy organisations, Simon brings experience, insight and vision to Retrofit Works.
Cath Geoghegan
operational director
Cath Geoghegan began her career in the financial services industry, where she developed strong skills in strategic thinking and stakeholder engagement. Motivated by a passion for sustainability and social impact, she made a bold career shift, earning a Master’s in Advanced Environmental and Energy Studies from the Centre for Alternative Technology in Wales.
Her move into the fuel poverty sector saw her working with local authorities in West Sussex, where she built valuable partnerships across health, social services, and energy providers, while deepening her expertise in energy efficiency and sustainable housing.
At RetrofitWorks, Cath has built an impressive track record of delivering high-quality retrofit projects in collaboration with local authorities and managing schemes that provide direct support to homeowners. Looking ahead, she is focused on expanding the company’s impact through digital innovation, sustainable practice, and strong, trusted industry relationships.
Jason Marple
Commercial director
Jason Marple is an accomplished commercial leader with a proven record of building, scaling, and steering businesses within the construction, insurance, and sustainability sectors. As Commercial Director at RetrofitWorks, he applies a strategic and results-driven approach to strengthen the business’s commercial performance, drive operational excellence, and maximise growth opportunities across both public and private markets.
Drawing on extensive experience in business development and client management from the insurance sector, Jason brings a disciplined approach to commercial strategy, governance, and partnership growth. He is focused on expanding RetrofitWorks’ portfolio of innovative schemes and services, ensuring the business continues to deliver measurable value while maintaining financial resilience and sector leadership in the UK retrofit market.
He is also currently working towards Chartered status with the Chartered Institute of Building (CIOB), reflecting his ongoing commitment to professional excellence and industry best practice.
David O’Neill
Membership Manager
David is responsible for developing and supporting our network of trusted contractors, installers, and architects, ensuring the delivery of high-quality, whole-house retrofit services.
His relationship with RetrofitWorks spans nearly a decade. Originally a qualified Gas Safe engineer, David was inspired by RetrofitWorks to embrace a whole-home approach to retrofitting and has since qualified as a Retrofit Coordinator.
Among his many accomplishments, David managed the Electrification of Heat Demonstration Project at RetrofitWorks funded by BEIS, successfully overseeing the installation of 742 heat pumps across a range of housing types despite the challenges of the Covid-19 pandemic. He also plays a key role in supporting colleagues delivering the £43 million Warmer Homes Programme.
Geordie Stewart
Scheme Manager - Cosy Homes Oxfordshire
A skilled construction and project manager with over 25 years of international experience, Geordie is passionate about sustainable and energy-efficient solutions for homes and buildings. He is a trained Retrofit Coordinator and leads the Cosy Homes Oxfordshire team based in Charlbury, Oxfordshire.
Geordie earned a distinction in his MSc in Architecture and Advanced Environmental and Energy Studies at the Centre for Alternative Technology (CAT) and the University of East London.
Ian Preston
Scheme manager – Cosy homes london
Ian is a qualified Retrofit Assessor and Retrofit Coordinator, holding a Level 3 Award in Energy Efficiency for Older and Traditional Buildings. He also holds an MSc in Architecture: Advanced Energy and Environmental Studies from the Centre for Alternative Technology and the University of East London.
With a career in sustainable construction dating back to 2007, Ian has been conducting home energy surveys since 2012. His earlier qualifications include EcoHomes, the Code for Sustainable Homes, Home Quality Mark, BREEAM, and Certified European Passivhaus Designer, reflecting a strong foundation in low-carbon building design and performance assessment.
Cassiopeia Kelly
Senior Retrofit Project Administrator - Warm Homes: Local Grant
Cassie has worked in the retrofit and energy efficiency sector since 2014 and joined RetrofitWorks in 2022, contributing across a range of regional schemes.
Cassie currently supports the delivery of the Warm Homes Local Grant across East Sussex, coordinating and managing key activities from household engagement through to installation, ensuring compliance, quality, and smooth communication between all partners.
Cassie is committed to helping households access vital energy-saving improvements, supporting RetrofitWorks’ mission to deliver community-led retrofit that creates warmer homes and stronger, more sustainable communities.
What our members say
Finding you guys was a godsend. It was good to have impartial and independent advice. We had some surveys and quotes done before that didn’t inspire us with confidence, but you guys did exactly what we were looking for.
Rated 5 out of 5
Working from home and being here most of the day, I’d got used to it being really cold, but now it’s just a constant pleasant temperature.
Rated 5 out of 5
Our new heat pump, PV panels, and enhanced insulation have completely transformed our quality of life at home. We stay cosy throughout winter with the thermostat set to just 17 degree C. We’re glad to see the back of our aging gas boiler - the heat pump does a better job, with much lower carbon emissions.
Rated 5 out of 5
I think if anybody was thinking about going to Cosy Homes Oxfordshire and talking to them about doing the whole house plan, I would absolutely say go for it. I’m not sure we could have done this without them.
Rated 5 out of 5
I have had my heat pump for just a year now and am very pleased with it. My home is well insulated and I have solar panels, so I removed the gas meter (saving 150 pound on the standing charge). By using a solar battery and off peak overnight electricity my energy bills have dropped by half - now about 800 pound for a 4 bedroom detached with people in all day.
Rated 5 out of 5
Working with your home better has greatly improved our business’s processing efficiency. Their expertise has streamlined our operations, reduced costs, and allowed us to focus on delivering better results to our customers.
Rated 5 out of 5
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