Drainage Engineer

Mannik Smith Group; Meridian (ID); On-site; USD 80,000 - 100,000; Full time

Benefits offered by this job

Medical, dental, vision, life, and disability insurance

Generous paid time off

401(k): 50% match of contribution up to 6%

Professional development opportunities

Paid professional organization membership and licensure

Job summary

Mannik Smith Group is seeking a Drainage Engineer with 7-9 years of experience to lead the planning, design, and delivery of stormwater and drainage projects in Meridian, ID. The successful candidate will collaborate with multidisciplinary teams, ensure compliance with standards, and mentor junior staff. We offer a competitive salary and comprehensive benefits including medical insurance, generous PTO, a 401(k) match, and professional development opportunities.

Qualifications

• 7-9 years of progressive experience in drainage and stormwater engineering.
• Strong understanding of hydrology, hydraulics, and drainage design principles.
• Professional Engineer (PE) license or actively pursuing licensure.

Responsibilities

• Lead and contribute to the design of stormwater and drainage systems.
• Prepare and review drainage reports, technical calculations, and specifications.
• Perform hydrologic and hydraulic modeling using industry-standard software.

Skills

Hydrology

Hydraulics

Drainage design principles

Written communication

Verbal communication

Problem-solving

Collaboration

Attention to detail

Civil Engineering knowledge

Education

Bachelor’s degree in Civil Engineering or related discipline

Tools

Civil 3D

HEC-RAS

InfoDrainage

XP-SWMM

Job description

Drainage Engineer

Department: Community Infrastructure

Employment Type: Full Time

Location: Meridian, 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

Equal Opportunity Employer including disability and protected veteran status