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About this Office

Denver, CO

The W.E. O’Neil Denver office sits in beautiful downtown Littleton, Colorado, and focuses on projects in the following markets:

We have a diverse team of professionals in Denver who enjoy building the dreams for our clients. Finding solutions to meet a project’s goals is highly rewarding and we come together as one team to see them through. By putting our heads together, and bringing in trade partners, the design team, and our clients, we develop strong bonds which span not only the life of the project but our careers. From interns to our senior executives, we embrace the development of our leaders and their professional development.


Federally required notice for self-funded health plans – Keeping our employees in the know.
“Transparency in Coverage” Legal Compliance (Healthcare): The following link leads to the machine-readable files that are made available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine-readable files are formatted to allow researchers, regulators, and application developers to access and analyze data more easily. Click here to visit Cigna’s website to access these machine-readable files (MRFs)

Reach Out

Denver, CO

5800 S. Nevada Street
Littleton, CO 80120


Employment Opportunities

Dan Sulewski
Director of Personnel Development

Email Dan


Jennifer Edwards
Director of Business Development & Marketing

Email Jennifer

Trade Partners

Nik Vigil
Estimating Coordinator

Email Nik

Information Request

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Representative Clients

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By The Numbers

Mile High
Sunny Days a Year
Professional Sports Team
Ski Resorts
Rivers to Fish

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Giants 400: Top Contractors #51

Ranking | Building Design + Construction