O’Neill Service Group (OSG) is a leading provider of Environmental and Construction Quality Assurance Solutions on Large-scale Transportation, Infrastructure and Commercial Projects in the Pacific Northwest.  Our experienced team of more than 60 scientist, engineers, inspectors and testers work collaboratively to support your project from design through permitting, construction and commissioning.  

Whether you are building the world’s largest floating bridge, a state-of-the-art Light Rail System or a High-rise mixed-use community, OSG stands ready to bring value to your project.   

We are widely known by our clients to be responsive, reliable and driven to provide innovative practical solutions. 

We provide a full range of Environmental and Construction Quality Assurance Services to both public and private sector clients.  Our expertise includes: 

•	Tunnels
•	High Speed Rail
•	Elevated Light Rail 
•	Transit Station
•	Concrete and Steel  Bridges
•	Historic Bridge Restorations
•	Roadways
•	Parking Structures 
•	Seawalls and Port Facilities
•	Mix-Use Commercial Complexes
•	Stadiums Renovation

O'Neill Service Group is hiring!! We are currently hiring for the following positions:

•	Construction Inspector: Civil/Roadway & Bridges/Structures (Puget 
        Sound Region)
•	Engineer-in-Training (Puget Sound Region)
•	Geotechnical Engineer (Puget Sound Region)
•	Quality Program Coordinator (Puget Sound Region)

Please visit our website below for more information about these roles and how to apply.

Construction

Infrastructure

Transportation

O'Neill Service Group

O'Neill Service Group's headquarters in Redmond, WA, United States

Dennis O'Neill

Sam Harrison

Justin A. Clements

Madeline Sargent

Camille Felkins

The Environmental Science and Engineering Team at O'Neill Service Group is responsible for ensuring environmental compliance and providing innovative solutions for large-scale transportation, infrastructure, and commercial projects. This team conducts environmental assessments, manages natural resources, oversees ecological impact evaluations, and supports the permitting process to facilitate sustainable project development and construction quality assurance. They work collaboratively to address environmental challenges and ensure regulatory adherence throughout all project phases.

Environmental Science and Engineering Team

The Inspection Team at O'Neill Service Group is responsible for ensuring the integrity and quality of construction projects by performing detailed inspections. This includes evaluating the structural, civil, geotechnical, and electrical aspects to ensure compliance with design specifications, safety standards, and regulatory requirements. Their expertise covers a wide array of projects such as bridges, rail systems, and mixed-use developments, contributing to the successful delivery of large-scale infrastructure projects in the Pacific Northwest.

O'Neill Service Group

Org chart

Teams

Environmental Science and Engineering Team

Inspection Team

Offices

O'Neill Service Group

Org chart

Teams

Environmental Science and Engineering Team

Inspection Team

Offices

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