Drainage Engineer

Mannik Smith Group; Idaho Falls (ID); On-site; USD 70,000 - 90,000; Full time

Benefits offered by this job

Medical, dental, vision, life, and disability insurance

Generous paid time off

401(k) with company match

Professional development opportunities

Job summary

Mannik Smith Group is seeking a Drainage Engineer in Idaho Falls, ID. In this role, you will lead the design and delivery of drainage and stormwater infrastructure projects, mentoring junior engineers and collaborating with teams to provide optimal solutions. You should have 7–9 years of experience in the field, a degree in Civil Engineering, and proficiency in relevant software. Competitive salary and benefits are offered, including medical insurance and paid time off.

Qualifications

• 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 and drainage design principles.

Responsibilities

• Lead and design stormwater, drainage, and flood mitigation systems.
• Prepare and review drainage reports and technical calculations.
• Perform hydrologic and hydraulic modeling using industry-standard software.

Skills

Hydrology

Drainage Design Principles

Problem-solving

Communication Skills

Project Management

Education

Bachelor’s degree in Civil Engineering

Tools

Civil 3D

HEC-RAS

InfoDrainage

XP-SWMM

Job description

Drainage Engineer

Department: Community Infrastructure

Employment Type: Full Time

Location: Idaho Falls, ID

Description

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 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.

What are the core responsibilities for the role?

• 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

Qualifications, Skills, and Competencies:

• 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

Why would a candidate want this job?

At Horrocks, you can expect a competitive base salary and award‑winning benefits. Including, but not limited to:

• Medical, dental, vision, life, and disability insurance
• Generous paid time off
• 401(k): 50% match of contribution up to 6%
• Professional development opportunities including in‑house training
• Paid professional organization membership and professional licensure

For more information, visit our website at www.horrocks.com

Equal Opportunity Employer including disability and protected veteran status