Meet the team of ista UK

Our team here at ista bring wealth of experience from a variety of professional backgrounds offering you the best energy services throughout the UK.

James Grainger

Head of Heat Sales

James is our Head of Heat Sales and manages the ista sales team across the UK. He has over 20 years experience in delivering solutions to the industry across a number of differing sectors. The heat team is responsible for delivering a high quality service in sales, support and consultation in metering, data collection, billing platforms and portals in support of landlords, specifiers, property managers and developers. 

Martin Thomas

Regional Sales Director

Martin moved to ista Energy Solutions in 2013 and with the help of his team, looks after the London & Home Counties area. Martin likes to engage with mechanical & electrical engineers, consultants, developers & landlords about the products and services that we offer.

Gary Oxley

Head of Finance

Gary is our Head of Finance. With over 10 years of managing finance teams across a range of industries, Gary manages the accounting function for ista, as well as responsibilities for HR and the Tenant Care team for the Heat business.

Mark Metcalfe

Commercial Manager

Mark is an accomplished sales/commercial manager with extensive experience of handling and developing a large portfolio of prominent client accounts. Working at ista since 2000, Mark has been responsible for energy procurement, new supply infrastructure and overall client retention.

ista International Management