Staff Engineer - Water & Wastewater Conveyance

InterAgency; Washington (District of Columbia); Hybrid; USD 70,000 - 100,000; Full time

Benefits offered by this job

Bonus eligibility

Profit sharing

Medical insurance

Dental insurance

Vision insurance

401(k) Safe Harbor match

Paid time off (up to 20 days)

Life insurance

Disability insurance

Flexible spending accounts

Paid holidays and leave

Job summary

InterAgency Inc. is seeking a Staff Engineer to join our water and wastewater conveyance practice in the DC metro region. The role supports design, analysis, and field work on projects for DC Water, WSSC, Fairfax, and others.

The position welcomes recent graduates and EITs. You will perform hydraulic calculations, develop plans in AutoCAD/Civil 3D, manage data, and support construction-phase services with travel across the DC area.

Qualifications

• Bachelor's degree in Civil or Environmental Engineering.
• 0–4 years of engineering experience.
• Coursework or knowledge of fluid mechanics and hydraulics.
• Proficiency with AutoCAD/Civil 3D and Excel for calculations.
• Willingness to perform field work and travel to DC metro sites.
• Valid driver's license.

Responsibilities

• Support design and analysis tasks for water/wastewater conveyance projects.
• Prepare calculations and hydraulic modeling inputs.
• Produce plans and figures in AutoCAD/Civil 3D and GIS.
• Organize project data and quality-check records.
• Draft technical memoranda, design reports, and specs.
• Perform field work at facilities and construction sites.
• Support construction-phase services including submittals and RFIs.
• Coordinate with clients and InterAgency colleagues.
• Assist proposal development with graphics and project descriptions.
• Accurately track hours and task progress.

Skills

Fluid mechanics & hydraulics

Written communication

Attention to detail

Field work readiness

Travel readiness

Education

Bachelor's degree in Civil/Environmental Engineering or related

Master's degree in Civil/Environmental Engineering (preferred)

EIT certification or FE exam passed/scheduled (preferred)

Tools

AutoCAD/Civil 3D

Microsoft Excel

GIS

InfoWorks ICM / SewerGEMS / WaterGEMS (preferred)

Job description

Staff Engineer – Water & Wastewater Conveyance

Location: Hybrid – DC-MD-VA region

About InterAgency Inc.

InterAgency Inc. is a dynamic and fast-growing water resource consultancy specializing in infrastructure planning and environmental compliance across the D.C., Maryland, and Virginia region. Over our 15-year history we have provided facility design, regulatory coordination, NEPA and Clean Water Act permitting, and program management support on multibillion-dollar deep tunnel programs, biosolids facility upgrades, coastal resilience projects, and drinking water access initiatives.

Position Overview:

InterAgency Inc. is seeking Staff Engineers (both recent graduates and EITs) to join our growing water and wastewater conveyance practice. We are looking for highly motivated, process-driven and detail-oriented professionals to support our engineering teams on design, analysis, and field support tasks. Our current projects center on water and wastewater conveyance in the Mid-Atlantic region, with our current client base including DC Water, WSSC, Fairfax, Loudoun, Arlington and AlexRenew.

Key Responsibilities:

• Support design and analysis tasks for water and wastewater conveyance assignments, including hydraulic capacity evaluation, alternatives analysis, rehabilitation versus replacement strategy, pipeline and force main design, pump and lift station design, diversion and flow control structures, and trenchless and tunnel engineering support.
  • Prepare engineering calculations and support hydraulic modeling under the direction of senior staff, documenting inputs, assumptions, and results.
  • Produce and revise plans, details, and figures in AutoCAD/Civil 3D and GIS.
  • Compile, organize, and quality-check project data, such as utility records, as-built drawings, GIS datasets, flow monitoring data, and CCTV and condition assessment records.
  • Draft sections of technical memoranda, design reports, and specifications.
  • Perform field work including site reconnaissance, structure and manhole inspection support, flow monitoring support, and construction observation.
  • Support construction-phase services, including submittal logging and review support, RFI tracking, and record drawing preparation.
• Coordinate directly with engineering partners, client staff, and InterAgency colleagues on assigned tasks.
• Support proposal preparation, including graphics, resumes, and project description write-ups.
• Track your own hours and task status accurately and communicate progress and obstacles to your task lead.

Qualifications:

Required Qualifications:

• Bachelor's degree in Civil Engineering, Environmental Engineering, or a closely related discipline.
• 0-4 years of relevant engineering experience.
• Coursework or demonstrated working knowledge of fluid mechanics and hydraulics.
• Familiarity with AutoCAD/Civil 3D, and Microsoft Excel for engineering calculations.
• Clear written communication and attention to detail in preparing and checking technical work.
• Willingness to perform field work at active water and wastewater facilities and construction sites.
• Valid driver's license and ability to travel to project sites throughout the DC metro region.

Preferred Qualifications:

• Engineer in Training (EIT) certification, or Fundamentals of Engineering (FE) examination passed or scheduled.
• Master's degree in Civil Engineering, Environmental Engineering, or a related field.
• Coursework or project experience involving water or wastewater engineering.
• Exposure to GIS, InfoWorks ICM, SewerGEMS, WaterGEMS, or comparable platforms.
• Interest in pursuing professional licensure and building a career in water infrastructure.

Employment Conditions:

• Full-time, exempt employment.
• Work conditions & location: Regular presence at client and home office locations throughout the DC metro region.

Physical Requirements:

• Must be able to perform essential duties satisfactorily with reasonable accommodation.
• Work is generally done sitting, talking, hearing, and typing. Visual acuity to use a keyboard, prepare and analyze data and figures; transcribing, viewing a computer terminal; extensive reading.
• Periodic site visits require the ability to traverse uneven terrain and active construction sites, wear personal protective equipment, and observe confined space and utility site safety protocols.

Compensation & Benefits:

• Salary range: $70,000 – $100,000, commensurate with experience and qualifications
• Eligible for bonus
• Eligible for-profit sharing
• Medical, dental, and vision insurance
• Retirement plan with 401(k) Safe Harbor employer match.
• Paid Time Off: up to 20 days per year, prorated during the first year of employment.
• Life insurance and disability insurance
• Flexible spending accounts
• Paid holidays and paid leave benefits.

Must be legally authorized to work in the United States. InterAgency, Inc. is unable to provide employment visa sponsorship now or in the future for this position.

InterAgency employment practices are in accordance with the laws that prohibit discrimination against qualifiedindividuals on the basis of race, religion, color, gender, age, national origin, physical or mental disability,genetic information, veteran’s status, marital status, gender identity and expression, sexual orientation,or any other status protected by applicable law.

InterAgency is an equal opportunity employer.