Karen Malone
Invoicing & Materials Management

Karen has worked in various administrative roles in the construction industry. Office management, purchasing and sales accounting are her main areas of responsibility.

Bridget Cleary
Customer Services Manager

As a Customer Services Manager, she is responsible for all aspects of our customer service provision. Bridget previously worked in various management roles in industry.

Teresa O'Neill
Accounts Manager

Teresa is the longest serving member of the Clean Energy Ireland team. As our account’s manager Teresa is responsible for all accounts receivable and payable.


Con Dempsey
General Manager

Con holds an honours degree in Commerce from UCC. He has over 20 years’ experience in all aspects of the construction industry. In recent years Con has specialised in ventilation systems from design to handover. Appointed to the position of General Manager, Con is now responsible for the day to day activity of the business.

Mark Clifford
Engineering Support

Mark has an honours degree in Sustainable Energy Engineering from Cork Institute of Technology. He is responsible for the design of solar systems for commercial and domestic applications, costing and renewable energy technical support.

Sean Costigan
Ventilation & Air tightness

Sean holds an honours degree in Quantity Surveying from Cork Institute of Technology. He has worked as a quantity surveyor in the construction industry for 10 years. Sean is an NSAI certified Air tightness tester. Currently he is focusing on designing and pricing Mechanical Ventilation Systems including MHRV, DCV and MEV.


David Ryan

Dave is a qualified electrician and specialises in the installation of our Solar PV systems and heat-pumps. He has over a decade of experience working in the construction industry in both domestic and commercial settings.


Conor O'Keeffe

A native of Dublin he joined the CEI team in July 2018. Conor’s main focus is on the installation and servicing of our Solar Thermal range of products.

Willie O'Leary
HRV & Air Tester

Willie has a wide range of experience working in the construction industry at all stages of the construction process. In recent years he has focused on our HRV installation and is currently moving into air tightness testing.

Conan Fitzsimons

Conan is our most recent addition to the team. He is a qualified plumber with almost 20 years experience. Conan specialises in the installation of solar thermal and heat pumps.




John Banahan
Heating & Plumbing

John is a senior plumbing specialist. As a highly experienced member of the team he is responsible for all our under-floor heating installations and technical support for all plumbing queries.

Eoin Daly
Air & Sound Test Engineer

Eoin has an honours degree in Sustainable Energy Engineering. He is an NSAI certified air tester and is primarily focused on the art tightness aspect of the business.