Heavy Civil General Contractor

Mobilizing Economies Through Infrastructure

Reputable & Dependable In Southern California Since 1923

Local Resources Throughout Southern California

Global Support From the Colas Group and Bouygues S.A.

Award-winning Quality; Accredited In-House QC Lab & Support

Best in Service - Right Time & Right People

Safety-Focused Company Culture: Goal Zero

Sully-Miller is the most integrated and versatile general contractor in the region.

Sully-Miller Companies comprise Sully-Miller Contracting, United Rock Products, and Blue Diamond Materials. All companies support each other.

Blue Diamond Materials provides the hot mix asphalt, United Rock – the aggregate and Sully-Miller Contracting executes the projects. Accessibility to extensive resources and capabilities enable Sully-Miller Contracting to handle a broad spectrum of projects.

Wide Market Capabilities

Large infrastructure projects can have challenges that impact budgets and deadlines.

As an experienced partner with the right resources, we easily adapt so the job gets done safely and efficiently.

Outstanding EMR
Local Airport Projects in the Last 10+ Years
0 +
On ENR’s 2021 Top 50 Domestic Heavy Contractors
# 1
Tons of P-401 Paved in the Last 5 Years
1 k

Organizational Excellence

Our vertically integrated company streamlines any project to ensure cost efficiency, quality, and service.

United Rock Products

Locally sourced aggregate and inert fill materials

Blue Diamond

High-quality asphalt mixtures and service


Access to a wealth of resources & innovative technology

Join The Team

If you’re motivated, dedicated and looking for a challenging career in the construction industry, it’s time to join the Sully-Miller team.

Colas Inc. and its subsidiaries are an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, sex, age, creed, national origin, citizenship, ancestry, marital status, sexual orientation, gender identity or expression, employable physical or mental disability, medical condition, genetic information, military or veteran status, or any other characteristics protected by federal, state and local law. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Colas Inc. and its subsidiaries are in compliance with local, state and federal laws and regulations and ensure equitable opportunities in all aspects of employment. We welcome minorities and women to apply.

Serving Southern California for a Century