Donal O’Callaghan, Managing 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 Managing 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 & Mechanical Engineering

Declan Hughes is an engineer with over 25 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.

Niall Flaherty, Director of Process and Project Engineering

Niall is Director of Process and Project Engineering for Callaghan Engineering. This role involves management of his department and also acting as Project Manager of a number of projects in the Data Centre and BioPharma industries. Niall has also been involved in a number of projects ranging from €0.5M to €75M acting as Principal Process and Project Engineer for clients such as Millipore, BMS, Leo Pharma, Braun amongst others. Responsibilities on these projects have ranged from process design, front end studies, capital cost estimation, project management through to validation and handover to the client.
Niall flaherty
Fergus Cawley

Fergus Cawley, Director of Electrical Engineering and Control Systems

Fergus has over 25 years experience in design, construction and commissioning of power generation plants, combined heat & power systems, pharmaceutical plants and large data centres. Fergus is now Director of Electrical Engineering & Control Systems for Callaghan Engineering having previously been Principal Electrical Engineer, and has specific responsibility for managing the E&I team, ensuring quality and managing budgets and schedule, as well as business development. Fergus has spent several years overseas in South America, Canada and Korea as lead start-up engineer for Westinghouse Power Generation on several gas turbine and combined cycle power plants. He has also designed and delivered several Combined Heat & Power projects here in Ireland. He is also very knowledgeable of mechanical systems with specific expertise in engine / prime mover technology, as well as heat exchangers and energy optimisation. In addition, Fergus has expertise in critical power solutions for data centres, hospitals and pharmaceuticals, including gas and diesel generation and UPS systems.

Miriam O’Callaghan, Financial, Marketing and Human Resources Director

Miriam worked in the healthcare sector for 20 years prior to the formation of Callaghan Engineering. In this role she was the Research Nurse for the National Maternity Hospital where she worked on a number of projects involving women's paid employment in pregnancy. Co founder of Callaghan Engineering, Miriam has responsibility for the Financial, Marketing and Human Resources sectors of the company. In her marketing role she has organised a number of events to increase the profile of Callaghan Engineering amongst our client base. In addition to her role as Financial, Marketing & HR Director of Callaghan Engineering, Miriam also served for a number of years on the Board of Enterprise Ireland, the Government Agency responsible for the development and promotion of the indigenous business sector.
Miriam O'Callaghan

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.