The firm employs more than 500 professionals in 20 offices, and specializes in energy services, water resources, civil design, planning, environmental studies, and communications for transportation development projects.

The firm's clients include state departments of transportation (DOTs), metropolitan planning organizations (MPOs), turnpike authorities, counties, municipalities, and energy/utility companies.

In the 1970s, the firm shifted focus toward transportation planning and design, and began employing a multi-disciplinary approach to projects.

The result was that McCormick Taylor emerged in the 1980s as a full-service consulting engineering and environmental planning firm focused on transportation projects.

McCormick Taylor also expanded into new markets, growing from predominantly transportation-related work for the public sector to permitting and environmental monitoring activities for private energy and utility companies.