Public engineering firm profile
Trilogy Engineering Services LLC
Houston, TX
It's About Our Clients!
- Services
- 41
- Offices
- 2
- Leaders
- 2
- Founded
- 2015
Overview
Trilogy Engineering Services LLC is a Houston-based engineering firm founded in 2015, with additional operations in Jackson, MS. Providing engineering and professional services to municipal, private, and industrial clients across the Gulf Coast and Southeast, Trilogy Engineering Services brings experience in drinking water and wastewater infrastructure design, water resources management, environmental planning and remediation, and disaster recovery coordination. Staff background spans design, project management, and construction oversight of large-scale infrastructure, enabling a full-service approach from planning through construction administration.
- Founded
- 2015
Services
Drinking Water Design
Design and engineering services for new and rehabilitated drinking water infrastructure, including system modeling, treatment plant design, and construction administration.
Wastewater Design
Design and engineering services for wastewater collection, transmission, treatment, and rehabilitation, including pump stations, force mains, and biosolids disposal.
Water Resources
Technical and managerial support for water resource projects, including stormwater management, floodplain modeling, erosion control, and water quality sampling across the Gulf Coast and Southeast.
Environmental
Environmental planning, compliance, site investigation, and remediation services supporting EHS strategies and regulatory consent decree management.
Disaster Recovery
Disaster response and recovery services, including FEMA/HUD coordination, debris monitoring, infrastructure reactivation, and damage assessment for water and wastewater systems.
Industries
Firm type
Credentials and affiliations
Leadership
Thessalonian R. LeBlanc
CEO and President of Finance and Administration
MBA
Thessalonian LeBlanc co-founded Trilogy Engineering Services in 2015 and serves as CEO and President of Finance and Administration. Prior to founding Trilogy Engineering Services, she spent over 30 years at multinational engineering firms, developing broad experience in the administrative and delivery aspects of large-scale engineering programs.
Harold Underwood, Jr.
President of Business Development
Harold Underwood joined Trilogy Engineering Services in 2016, bringing additional expertise in environmental services and business development. He brings over 30 years of experience from multinational engineering firms.