Trilon Group

Infrastructure consulting for transportation and water

Hydrology & Hydraulics Design Engineer

Water Resources EngineeringUpdated on Nov 13

Full-timeJackson, MS, USA$100k - $130k /yrIn-person

About the Job

Requirements

A Bachelor's degree in Civil Engineering or a related field is required.
Four to eight years of relevant hydrology and hydraulics experience is required.
Experience with hydrology and hydraulics modeling software such as HEC-RAS, HEC-HMS, and HY-8 is required.
A Professional Engineer license in Mississippi, or the ability to obtain one within six months, is required.
Strong communication skills and the ability to work in a team-oriented environment are required.

Responsibilities

Perform hydrologic and hydraulic analyses and design calculations for infrastructure and land development projects.
Develop and review drainage reports, design plans, and supporting documentation.
Use modeling software such as HEC-RAS, HEC-HMS, HY-8, and related tools to evaluate drainage systems and flood impacts.
Support project managers in developing scope, schedule, and budgets for hydrology and hydraulics tasks.
Coordinate with internal teams across transportation, site development, and environmental disciplines.
Assist with preparing permit applications and coordinating with regulatory agencies, including FEMA and DOT.
Participate in field reviews and provide construction-phase support as needed.
Ensure the quality and accuracy of work through quality assurance and quality control processes.
Build and maintain client relationships through project delivery and communication.
Mentor junior engineers and designers, providing guidance on technical work and best practices.
Stay current on industry standards, regulations, and emerging tools related to hydrology and hydraulics.

Desired Qualifications

Experience with Mississippi Department of Transportation work is preferred.
Familiarity with FEMA regulations, floodplain management, and DOT standards is preferred.

Waggoner is looking for a Hydrology and Hydraulics Design Engineer to join our growing team and support a diverse portfolio of drainage and water resources projects. This role offers the opportunity to take ownership of technical design tasks, contribute to meaningful infrastructure improvements, and work alongside experienced engineers across multiple disciplines. It is well suited for a mid-level professional looking to deepen their expertise in H&H modeling and design while continuing to develop professionally.

Services provided in this discipline include planning, design, and construction support of:

Roadway Drainage Systems Design (MS DOT experience preferred)
Stormwater Management
Detention and Retention Pond and Outfall Design and Analysis
Bridge Hydraulics and Scour Analysis
Erosion Control Design and Analysis
Watershed Hydrology and Drainage Studies
Open Channel Hydraulics Design and Analysis
Channel Stabilization
Hydraulic Modeling (HEC-RAS 1D/2D, MS DOT, HydroWIN, FHWA HY-8 and Hydraulic Toolbox)
Design of Hydraulic Structures
Floodplain Mapping and FEMA Modeling support

Responsibilities / Essential Functions

Perform hydrologic and hydraulic analyses and design calculations for a variety of infrastructure and land development projects
Develop and review drainage reports, design plans, and supporting documentation
Utilize modeling software such as HEC-RAS, HEC-HMS, HY-8, and related tools to evaluate drainage systems and flood impacts
Support project managers in developing scope, schedule, and budgets for H&H-related tasks
Coordinate with internal teams across transportation, site development, and environmental disciplines
Assist with preparation of permit applications and coordination with regulatory agencies, including FEMA and DOT
Participate in field reviews and provide construction phase support as needed
Ensure quality and accuracy of work through QA/QC processes
Build and maintain relationships with clients through project delivery and communication
Mentor junior engineers and designers, providing guidance on technical work and best practices
Stay current on industry standards, regulations, and emerging tools related to hydrology and hydraulics

Bachelor’s degree in Civil Engineering or related field required
4 to 8 years of relevant hydrology and hydraulics experience
Experience with H&H modeling software (HEC-RAS, HEC-HMS, HY-8, etc.)
Familiarity with FEMA regulations, floodplain management, and DOT standards is preferred
Professional Engineer (PE) license in Mississippi, or ability to obtain within 6 months
Strong communication skills and ability to work in a team-oriented environment

About the Company

Trilon Group

Infrastructure consulting for transportation and water

Trilon Group provides infrastructure consulting in transportation, water, and municipal systems in the Mid-Atlantic region. It works by partnering with local governments, municipalities, and private clients to deliver planning, design support, and project management through fee-based engagements, expanding capabilities through alliances with firms like Rinker Design Associates and Wilson Engineers. The company differentiates itself with a platform-style growth approach backed by private equity and a People First culture focused on talent development. Its goal is to expand service offerings and market presence in the Mid-Atlantic by building scalable partnerships and using capital to support growth.

Company size: 51-200
Company stage: Growth Equity (Non-Venture Capital)
Total funding: $200M
Headquarters: Denver, CO
Founded: 2021

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