Meet the team

Simon Reilly

Commercial Director

Simon is a Chartered Accountant and has worked in corporate finance and infrastructure for more than 20 years, in both advisory and principal roles.

He joined SGN in 2017 with the objective of creating a thriving, commercial business to sit alongside SGN’s core regulated businesses. He is responsible for running and developing SGN’s non regulated investment business, renewable energy generation activities, operational property portfolio, property development business, supply-chain management, procurement and metering services.

Prior to joining SGN, Simon was the Head of Commercial Finance at Eversholt Rail Group for 4 years and before that he spent 15 years with EY, where he was a director in its corporate finance practice.

Marcus Hunt

Director, Commercial Services and Investments

Marcus leads our Commercial Services and Investments business with over 15 years’ experience in both regulated and non-regulated utility businesses both in the UK and US having previously worked for Thames Water and Veolia. Prior to joining SGN, Marcus spent five years with KPMG’s Infrastructure Advisory Practice, advising utility clients on a range of commercial and regulatory issues.

Alan Midwinter

Head of Renewable Development

Alan Midwinter is a degree-qualified engineer who has worked within the gas industry for over 39 years, in both operational and senior management roles. During his career, Alan has gained a broad depth of knowledge within the gas sector.

Alan has led many award-winning projects and was IGEM’s Gas Industry’s Engineer of the year in 2015.

He has been at the forefront of developing the biomethane industry within the UK since its inception in 2009 and is now considered one of the country’s leading experts. A member of the Institute of Engineering Technology, Alan is also panel member on the Biomethane technical working group at the Energy Network Association (ENA) and sits on the Anaerobic Digestion and Biogas Association’s (ADBA) advisory board. 

Robert Instrall

Head of Commercial

Rob Instrall is currently responsible for the commercial delivery of our existing Gas Metering and ‘De-minimis’ contracts. He is also responsible for seeking out new opportunities in these areas.

He has been in his current role since April 2018 having been with SGN since its formation in 2005.

He has fulfilled numerous other roles at SGN and across the gas industry, including managing SGN’s 24/7 operational call centre (OCC) and managing SGN’s regulated gas connections business.

Bob Smyth

Business Development Manager (Energy)

Bob has built up an intimate commercial knowledge and technical experience in heat networks attained during an expansive career within British Gas, Centrica, National Grid, Transco and Scotia Gas Networks.

Carolina Karlstrom

Senior Lead Environment & Climate Change

Carolina Karlstrom is SGN’s Senior Lead on Environment & Climate Change, advising and supporting the Group across both the regulated and non-regulated businesses. She has more than 20 years’ experience from the energy sector, having held several senior roles in project development, strategic planning and sustainability.

She started working with SGN in July 2019 and authored the Environmental Action Plan, submitted as part of our RIIO-2 Business Plan to Ofgem for the regulated business, and is leading on our environment and climate change strategy showing how we will achieve our ambitious net zero greenhouse gas emissions by 2045. 

Colin Small

Biomethane Project Manager

Colin is a senior project manager focussed on delivering biomethane projects in SGN’s Green Gas team.

Colin is a Chartered Engineer with significant experience in the gas industry. Colin started his Gas Industry career in 1981 as a Graduate Trainee and has subsequently enjoyed wide range of engineering and managerial roles.

In 2009 Colin joined SGN’s Green Gas team and played a key role in UK’s first demonstration biomethane project at Didcot, which formed much of the learning that the industry benefits from today. Colin's previous role in SGN was as the Operations Manager for the North of Scotland with wide ranging operational duties.

Colin's wealth of experience in project management, HSE matters and expertise in engineering pipe laying, repair and maintenance make him an extremely valued member of the team.

Craig Clark

Business Development Manager

Craig is responsible for the commercial management and growth of the Green Gas Solutions business unit within the wider SGN Commercial Services Renewable Development team.

Craig is a Chartered Member of RICS.  

Craig graduated in 2004 with BSc Hons in Quantity Surveying and has held various QS and commercial roles in construction, rail and civil engineering sectors, both in the UK and abroad.

Duncan Cook

Business Development Manager

Duncan is a senior manager in the team responsible for developing and delivering commercial contracts in the Renewable Development department.

He joined the biomethane team in 2014 and has been involved with a wide range of biomethane projects since. Duncan started work in the gas industry in 1992 as a British Gas apprentice and subsequently held several operational, contract and commercial management roles.

Duncan continues to act as a senior manager on SGN’s operational gas emergency standby rota.

Robert Croxford

Senior Commercial Manager - Metering

Rob is currently responsible for the commercial delivery of our existing Gas Metering Contracts and Meter Asset Management (MAM) business. He is also responsible for seeking out new opportunities in these areas.

He has been in his current role since April 2019, having been with SGN since its formation in 2005.

He has fulfilled numerous other roles in the gas industry, including Gas Engineer and Team Manager in our regulated business followed by a number of years in Commercial Services, managing a diverse selection of contracts and clients.

Saravanan Singaram

Compliance and Quality Manager

Saravanan is a Compliance and Quality Manager with a focus on our biomethane activities.

Saravanan specialises in safety culture transformation, implementing robust systems to monitor performance and provide assurance that the processes intend to achieve legislative compliance, manage our risks and to deliver our essential business outputs and obligations which are efficient, effective and reliable.

Susie Goss

Metering Support Manager

Susie manages the Meter Asset Management (MAM) Team in Horley office. Her team is responsible for providing focused and robust support services to customers, ensuring the delivery of key gas metering contracts.

Susie has been in her current role since 2012, having joined SGN in 2006. She has worked in the gas industry for 30 years and has held a variety of roles in British Gas, Global Gas and Transco.