OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice. The firm was founded in 1988 in Dublin and over the years has grown to become one of the leading multi-disciplinary engineering consultancies in the State, having worked successfully with all of the major public, semi-private and private clients in the Institutional, Commercial, Domestic & Industrial sectors. The practice has expanded to become an International Multidisciplinary Consulting Engineering firm with over 270 staff in Ireland and the UK. We provide Civil, Structural, Mechanical & Electrical, Sustainability and Traffic engineering design and consultancy, project management and PSDP services. OCSC is LEED, BREEAM, Low Carbon Energy Assessor, CEEQUAL and ISO 9001, 14001 & 18001 accredited as well as being a CPD award winning engineering consultancy with an untiring focus on continuing personal and professional staff development. We are also BSI verified for PAS 1192-2 Information Management for the capital/delivery phase of construction projects as a BIM Level 2 Tier 1 consultant. We are an accredited 'Great Place to Work' since 2018.
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The O'Connor Sutton Cronin annual revenue was $24.6 million in 2026.
Keith Knox is the CTO - Chief Technology Officer of O'Connor Sutton Cronin.
219 people are employed at O'Connor Sutton Cronin.
O'Connor Sutton Cronin is based in Dublin, Leinster.
The NAICS codes for O'Connor Sutton Cronin are [541, 5413, 54, 54133].
The SIC codes for O'Connor Sutton Cronin are [871, 87].