Trilon Group

Infrastructure consulting for transportation and water

Drainage Project Engineer

Water Resources EngineeringUpdated on Nov 13

Full-timeIdaho Falls, ID, USA$105k - $125k /yrIn-person

About the Job

Requirements

A Bachelor's degree in Civil Engineering or a related discipline is required.
Seven to nine years of progressive experience in drainage and stormwater engineering is required.
A Professional Engineer (PE / P.Eng. / CEng) license, or active progress toward licensure, is required.
Strong understanding of hydrology, hydraulics, and drainage design principles is required.
Proficiency with drainage and modeling software such as Civil 3D, HEC-RAS, InfoDrainage, XP-SWMM, or equivalent is required.
Experience working with public and private sector clients is required.
Ability to interpret survey data, geotechnical reports, and environmental constraints is required.
Knowledge of applicable codes, standards, and approval processes is required.
Ability to manage priorities and work independently is required.
A proactive, collaborative problem-solving approach is required.
Attention to detail and focus on practical, constructible solutions are required.
Strong written and verbal communication skills are required.

Responsibilities

Lead and contribute to design of stormwater, drainage, and flood mitigation systems for land development and infrastructure projects.
Prepare and review drainage reports, technical calculations, plans, and specifications.
Perform hydrologic and hydraulic modeling using industry-standard software such as Civil 3D, HEC-RAS, HEC-HMS, XP-SWMM, InfoDrainage, or similar.
Apply local, regional, and national drainage standards, guidelines, and regulatory requirements.
Identify and manage drainage-related risks, constraints, and opportunities throughout project development.
Manage assigned project components from concept through detailed design and construction support.
Coordinate with civil, transportation, structural, and environmental teams to deliver integrated solutions.
Review contractor submittals and respond to requests for information during construction.
Support development of cost estimates, schedules, and design optimizations.
Collaborate with clients, municipalities, and regulatory agencies to obtain approvals and resolve technical issues.
Participate in project meetings and present technical information.
Support proposal preparation, scope definition, and business development efforts as needed.
Provide technical guidance and mentorship to junior engineers and designers.
Review work prepared by others to ensure quality, accuracy, and consistency.
Contribute to continuous improvement of standards, tools, and internal processes.

At Horrocks, we believe the best work comes from companies with values, that our people are our greatest resource, and that we have a responsibility to the communities where we live and work. As a Drainage Project Engineer with 7–9 years of experience, you will play a key role in the planning, design, and delivery of drainage and stormwater infrastructure projects. This position offers the opportunity to lead technical efforts, mentor junior staff, and collaborate with multidisciplinary teams to deliver high-quality, buildable solutions for both public and private sector clients

Lead and contribute to the design of stormwater, drainage, and flood mitigation systems for land development and infrastructure projects
Prepare and review drainage reports, technical calculations, plans, and specifications
Perform hydrologic and hydraulic modeling using industry-standard software (e.g., Civil 3D, HEC-RAS, HEC-HMS, XP-SWMM, InfoDrainage, or similar)
Apply local, regional, and national drainage standards, guidelines, and regulatory requirements
Identify and manage drainage-related risks, constraints, and opportunities throughout project development
Manage assigned project components from concept through detailed design and construction support
Coordinate with civil, transportation, structural, and environmental teams to deliver integrated solutions
Review contractor submittals and respond to RFIs during construction
Support development of cost estimates, schedules, and design optimizations
Collaborate with clients, municipalities, and regulatory agencies to obtain approvals and resolve technical issues
Participate in project meetings and present technical information clearly and confidently
Support proposal preparation, scope definition, and business development efforts as needed
Provide technical guidance and mentorship to junior engineers and designers
Review work prepared by others to ensure quality, accuracy, and consistency
Contribute to continuous improvement of standards, tools, and internal processes

Bachelor’s degree in Civil Engineering or related discipline
7–9 years of progressive experience in drainage and stormwater engineering
Professional Engineer (PE / P.Eng. / CEng) license or actively working toward licensure
Strong understanding of hydrology, hydraulics, and drainage design principles
Proficiency with drainage and modeling software (e.g., Civil 3D, HEC-RAS, InfoDrainage, XP-SWMM, or equivalent)
Experience working with public and private sector clients
Ability to interpret survey data, geotechnical reports, and environmental constraints
Solid knowledge of applicable codes, standards, and approval processes
Strong written and verbal communication skills
Ability to manage priorities and work independently
Collaborative mindset with a proactive, problem-solving approach
High attention to detail with a focus on practical, constructible solutions

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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