Green Companies, Inc. (parent of the HR Green family of companies) has acquired Gauge Engineering (Gauge) a full-service, Houston-based engineering firm that specializes in transportation and drainage engineering analysis, design, and construction management services to public sector clients.
Gauge was co-founded by Derek St. John, PE, CFM, and Muhammad Ali, PE, ENV SP. The firm is recognized as a leader in finding solutions to difficult drainage and mobility problems and has extensive experience working in urbanized areas and retrofitting existing infrastructure. Additionally, they assist municipal clients with developing and managing multi-million-dollar capital improvement plans while overseeing infrastructure projects in some of Houston’s most congested districts, such as Memorial City, Montrose, and Harrisburg.
HR Green has been part of the Houston market since 1978, and this merger of talent and resources allows both organizations to provide a broader range of services to our clients while maintaining the same personal level of service.
“We are excited to welcome Gauge Engineering to the HR Green organization,” said HR Green’s CEO, Jason Poppen. “This strategic alignment strengthens our Transportation and Water Resources services while expanding our presence in Houston. Gauge’s outstanding reputation for client service and project excellence aligns seamlessly with our commitment of exceeding client expectations.”
Gauge Engineering is known in the region for attention to detail and long-standing client relationships. Their connection with their clients mirrors HR Green’s and we share the same commitment to project delivery and the highest level of client service.


“We are thrilled to join HR Green,” says Derek St. John, Principal and Founding Partner of Gauge Engineering. “This strategic partnership signifies greater access to services and experience across our now nationwide footprint while giving our employees additional opportunities for challenging projects and career advancement.”
Derek St. John joins HR Green’s organization as a Practice Leader for Texas Water Resources and Muhammad Ali joins as a Practice Leader for Texas Transportation. Leveraging their deep local expertise, they will continue to lead their expanded teams and drive excellence from our Houston offices.
About HR Green
Founded in 1913, HR Green has offices nationwide and provides engineering, planning, technical, and management solutions that build communities and improve lives in: Broadband, Construction, Environmental, Geospatial, Land Development, Municipal Services, Planning, Transportation, and Water. For more information, visit www.hrgreen.com.