At Denis O’Sullivan & Associates (DOSA), we practice the art of structural, civil engineering and project management. Engineering is the art of balancing an analytical understanding of materials and structural behaviour with the creativity of unfettered imagination.


DOSA has accumulated nearly 30 years’ experience with structural projects, providing engineering services through all stages of project delivery from master-planning, through full design and documentation and contract administration and construction phases of projects. Our long-term stability is a direct result of our client focused approach. The success of our ethos has resulted in long standing relationships many private and public-sector clients. Our objective is to provide our services in a professional manner such as will:

• Comply with the requirements of the Client Brief

• Achieve the design intent

• Comply with the relevant Standards and

statutory requirements

• Minimise the occurrence and extent of non-

conforming work and variations

• Meet the time and cost constraints on the


Ciaran O'Sullivan

December 15, 2021

DOSA Consulting Engineers

June 6, 2019

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July 6, 2017

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Trevor Woods Consulting Engineers Ltd.

July 5, 2017


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Roughan & O’Donovan

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T.J. O’Connor & Associates Consulting Engineers

July 5, 2017

O’Connor Sutton Cronin


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