Founded in 1950, the company have offices in Sligo and Dublin.  Since 1st August 2023, the company is part of RSK Group. The extent of the services provided by the company covers a broad range of sectors including civil, structural and environmental engineering, health and safety, Building and Infrastructure, including, aquaculture, flood relief, tourism, leisure amenity, water, wastewater, hydrology and the renewable energy sector. The services we provide are based on over 75 years of experience working with local authorities, utilities, commercial entities and industries in Ireland and overseas.

At Jennings O’Donovan, we pride ourselves on being responsive and in our ability to deliver clients expectations in an efficient and effective manner. The primary markets the company is currently operating in are Ireland, the United Kingdom and Eastern Europe. Sectors Renewable Energy Water Supply Planning & Environmental Waste Water Civil, Building & Structural Engineering Health & Safety Leisure & Recreational Jennings O'Donovan is part of the RSK Group The RSK group is a leading integrated environmental, engineering and technical services business offering bespoke end-to-end solutions to a variety of sectors.

Headquartered in the UK but with an established presence throughout Europe, Africa, the Middle East, Asia and Australia, RSK helps organisations around the world achieve their business aspirations in a sustainable and efficient manner.