Donal O’Callaghan, Director

Donal qualified from University College Dublin as a Chemical Engineer in 1973, and has over 40 years experience spanning manufacturing, engineering and construction industries. He has worked extensively abroad, mainly in the Middle East, Africa and North America.

In 1990 he co-founded Callaghan Engineering, a multi-discipline engineering and project management firm specialising in projects in the biopharmaceutical, medical devices, data centre, commercial, healthcare, educational, leisure and Government agency sectors.

In his role as Director he has overall responsibility for all company operations.

He has specialist expertise in process engineering, project management and in cost control of multi-million euro projects. In addition, Donal has acquired specialist expertise in environmental consultancy, principally in relation to air and water pollution control and is a Professional Consultant to An Bord Pleanalá.

He has a particular interest in the Asian market, and served as chairman of the Ireland China Association for a two year term in 2005 and 2006. More recently he is developing markets and working on projects in the Benelux/Germany regions and in the UK.

Donal O'Callaghan
Declan Hughes

Declan Hughes, Director of Projects & Business Development

Declan Hughes is an engineer with over 30 years’ experience in engineering design, construction, manufacturing, procurement and sustaining activities. He has expertise in general management, project management, construction management, cost control and process engineering. He has participated in the design and construction of a wide variety of projects in the industrial, commercial and public sector fields. Projects have ranged in value from less than €100K to over €500 million.

Declan joined Callaghan Engineering in the role of Director of Projects in 2013 with responsibility for managing a team of project managers who are overseeing the delivery of all projects within the firm. Declan ensures that projects are managed from a schedule, cost and quality of service perspective to achieve optimum performance of the team.

Mark Smith, Managing Director – EMEA

Mark Smith has 30 years of experience in the building services industry and throughout his career has been involved in diverse projects across the UK and Europe.

An accredited Tier Designer and Chartered Engineer, in 2020 Mark was awarded Fellowship of the IET and a Fellow of CIBSE.

Mark is an experienced Building Services Engineer and project Director. Mark has worked on a large number of data centre and mission critical projects as well as projects in the commercial, industrial, retail, educational, sports and healthcare sectors - a number of which have won industry awards.

Mark Smith

What we do

Callaghan Engineering, one of Ireland’s leading Consulting Engineering firms, provides multi-discipline professional engineering design, validation, procurement, project and construction management services.