Senior Drainage Engineer

Mannik Smith Group; Manassas (VA); On-site; USD 85,000 - 115,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401K Retirement Plan with Roth Contributions

Flexible Spending Accounts (FSA)

Job summary

Mannik Smith Group is looking for a Senior Drainage Engineer in Manassas, VA to manage drainage analyses and design for infrastructure projects. The role demands 7-12 years of experience, a PE license, and proficiency in HEC-RAS, SWMM, and MicroStation.

Join our team to enhance safety and environmental practices while enjoying competitive benefits such as medical insurance, 401K, and paid time off.

Qualifications

• 7–12 years of experience in drainage, stormwater, or water resources engineering.
• Professional Engineer (PE) license required or ability to obtain Virginia licensure.
• Experience with VDOT transportation projects.

Responsibilities

• Perform hydrologic and hydraulic analyses for transportation projects.
• Prepare drainage reports and technical documentation.
• Design storm sewer systems and erosion control measures.

Skills

Hydrologic and hydraulic analyses

Drainage design

Project management

Communication skills

Analytical skills

Education

Bachelor's degree in Civil Engineering or related field

Tools

HEC-RAS

HEC-HMS

SWMM

MicroStation

OpenRoads Designer

GIS (ArcGIS)

Job description

Senior Drainage Engineer

Department: Transportation

Employment Type: Full Time

Location: Manassas, VA

Description

Rinker Design Associates (RDA) is seeking a talented Drainage Engineer with 7–12 years of experience to join our Transportation team. In this role, you'll contribute to the analysis and design of drainage and stormwater systems for a variety of roadway and infrastructure projects. You'll work closely with project managers and multidisciplinary teams to deliver high-quality solutions that enhance safety, mobility, and environmental stewardship.

If you are looking for the opportunity to take ownership of technical work, mentor junior staff, and grow your career while working on meaningful projects, we'd love to hear from you.

$10,000 sign-on bonus!

What You'll Do:

• Perform hydrologic and hydraulic analyses and design for transportation and infrastructure projects.
• Prepare drainage reports, stormwater management calculations, and supporting technical documentation.
• Design storm sewer systems, culverts, channels, and erosion and sediment control measures.
• Develop plans and models using HEC-RAS, HEC-HMS, SWMM, MicroStation, and OpenRoads Designer.
• Coordinate with project managers, clients, and regulatory agencies to support project delivery.
• Ensure designs comply with VDOT, DEQ, FEMA, and applicable local and federal regulations.
• Participate in field investigations and provide construction support as needed.
• Collaborate with roadway, traffic, and environmental teams to deliver integrated project solutions.
• Assist with proposal preparation and provide technical guidance to junior engineering staff.

What You'll Need:

• Bachelor's degree in Civil Engineering or a related field.
• 7–12 years of experience in drainage, stormwater, or water resources engineering.
• Professional Engineer (PE) license required or ability to obtain Virginia licensure through reciprocity.
• Experience with VDOT transportation projects and familiarity with the VDOT Drainage Manual.
• Knowledge of FEMA, DEQ, and AASHTO standards and regulations.
• Strong analytical, communication, and organizational skills.
• Ability to manage multiple assignments and work effectively in a collaborative environment.
• Proficiency with industry software tools, including:
  • HEC-RAS (1D & 2D)
  • HEC-HMS
  • SWMM / InfoSWMM
  • MicroStation / OpenRoads Designer
  • GIS (ArcGIS) and other drainage design tools

Why Join RDA?

• Medical, dental, and vision insurance
• 401K Retirement Plan; Roth Contributions
• Health Savings Account (HSA)
• Flexible Spending Accounts (FSA)
• Life, AD&D, short-term and long-term disability
• Paid time off, including 8 federal holidays + 1 floating holiday
• Parental leave
• Professional/career development tracks
• Positive work/life balance.

RDA is an Equal Opportunity Employer and maintains a drug-free workplace.