Experienced Consulting Engineers
Jennings O’Donovan is a wholly Irish owned consulting engineering organisation of highly qualified people

Jennings O’Donovan is a multidisciplinary consulting engineering firm specialising in renewable energy, water supply, wastewater treatment and in the provision of planning and environmental services.
Founded in 1950, the company, which is wholly Irish owned, has offices across the country in Sligo, Dublin and Castlebar.
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 Pyrite/Mica Testing and Design Services to IS 465:2018, aquaculture, flood relief, tourism, leisure amenity, water, wastewater, hydrology and the renewable energy sector.
The services we provide are based on over 70 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.
Recent News
Winners of the Net Zero Achievement Excellence Award 2023
Jennings O'Donovan were thrilled to be announced as the winner of the Net Zero Achievement [...]
40 Years Ago Today
40 years ago today I began my working life in Engineering. I started work in [...]
Pyrite & Mica Testing – Design Services IS 465:2018
We are now actively providing Pyrite and Mica Testing and Design Services for houses and [...]
Customer focused, delivering quality work in a professional and efficient manner.




Engineering Excellence Award Winners 2018 and 2021
