Quadrant Consultants Inc


What We Do

Who We Are

How To Contact Us

About Us

Quadrant Consultants Inc. began in 1979 with four partners - three engineers and a planner - and a shared vision of a full-service, high quality consulting firm serving the transportation and infrastructure market. In 2016 a newly formed Q Consultants Inc. made an asset purchase of Quadrant Consultants Inc.

Quadrant Consultants Inc. is a multidisciplinary consulting firm, with capabilities in engineering, highway and airport planning, and environmental assessment. Quadrant offers consulting services to public and private clients. Based in Houston, Texas, Quadrant serves clients in Texas and throughout the United States.

Q Consultants Inc. dba Quadrant Consultants Inc. is continuing its legacy offering services from concept planning to environmental assessment to engineering design to construction management.


Quadrant professional engineers, planners and environmental scientists provide a wide range of expertise. Quadrant’s principals direct all projects and assure high quality. Quadrant consistently performs its projects on schedule and with professional excellence.


Excellence Through Diversity is our motto, and we can help you with just about any challenge your job can produce. Quadrant finds solutions to difficult problems. Quadrant’s experienced staff of engineers, planners and environmental scientists understands the issues and challenges of both public and private projects, and expertly solves them to make plans into realities. We can help build diverse teams that meet client goals.


Small Business Status

Quadrant is a Small Business Enterprise SBE), a Minority Business Enterprise (MBE) and Disadvantaged Business Enterprise (DBE). Quadrant is certified by:


Texas Unified Certification Program (TUCP) (DBE, SBE)

Texas Department of Transportation (SBE)

City of Houston Office of Business Opportunity (DBE, MBE)

Port of Houston Authority Small Business Development Program (SBE)

Metropolitan Transit Authority of Houston Office of Small Business (SBE)

Texas Department of Transportation (TxDOT) - Quadrant is pre-certified in Major Categories.