Environmental Engineering in Missouri

Missouri's environmental engineering market -- 971 employed professionals ranked #19 nationally at a $76,000 average salary -- is defined by the state's geographic position at the confluence of two of America's greatest rivers (the Missouri and the Mississippi), a significant industrial and manufacturing base in St. Louis and Kansas City, agricultural nonpoint source pollution challenges across the state's extensive cropland and livestock production areas, and a legacy of lead mining and smelting in the Southeast Missouri Lead District that represents one of the nation's most significant and long-running environmental contamination challenges. Major Employers: The Missouri Department of Natural Resources (MoDNR) is the state's primary environmental regulatory agency, employing environmental engineers across its Water Pollution Control Program (NPDES permits, water quality standards), Air Pollution Control Program (Title V and NSR permits), Hazardous Waste Program, and the Environmental Remediation Program (Superfund and voluntary cleanup). The U.S. Army Corps of Engineers (Kansas City and St. Louis Districts) employs environmental engineers for the Missouri and Mississippi River environmental programs, navigation project environmental permitting, and Superfund cleanup work at former military sites. Major consulting firms -- AECOM, Burns & McDonnell (Kansas City -- one of the nation's most significant environmental consulting firms, headquartered in Missouri), Arcadis, CDM Smith, and Missouri-based firms such as KCIE (Kansas City Infrastructure Engineers) and Terracon serve the state's environmental consulting markets. Boeing (St. Louis -- F-15 and F-18 production) and Emerson Electric (St. Louis headquarters) employ in-house environmental engineers. The mining sector in Southeast Missouri (Doe Run Company's lead mining operations) employs environmental engineers for one of the nation's most complex and historically significant lead mining environmental compliance programs. Key Practice Areas: Lead contamination remediation is Missouri's most distinctive environmental engineering practice -- Southeast Missouri (the "Lead Belt") has been one of the world's most prolific lead mining and smelting regions since the 18th century, and the legacy of this industry includes some of the most extensive lead contamination in North America. The Herculaneum smelter (Doe Run's primary lead smelter, closed in 2013) and the historical Buick, Boss, and Glover smelters created soil and groundwater lead contamination across dozens of Missouri communities. The Tar Creek Superfund site in Oklahoma (the most contaminated Superfund site in the nation at its peak) extends into Missouri. Missouri River water quality engineering is a major practice -- managing agricultural nonpoint source nutrient loading, managing floodplain development environmental impacts, and overseeing the Missouri River recovery program for endangered species (pallid sturgeon, interior least tern) engage environmental engineers in complex multi-stakeholder programs. Kansas City and St. Louis have significant brownfield redevelopment environmental engineering demand from their respective industrial histories.

Missouri environmental engineering careers benefit from the state's diverse industrial and agricultural environmental challenges, the presence of Burns & McDonnell as a major national environmental consulting employer headquartered in Kansas City, and a cost of living that makes Missouri one of the best purchasing power states in the Midwest for environmental engineers. Typical Career Trajectory:

• Staff Environmental Engineer (0-3 years): $55,000-$70,000 -- Entry-level roles at MoDNR, consulting firms (Burns & McDonnell, CDM Smith, AECOM), or industrial environmental departments. Missouri entry-level environmental engineers typically begin in environmental site assessment, stormwater compliance, or NPDES permit compliance support given the breadth of the state's market.
• Project Environmental Engineer (3-6 years): $70,000-$90,000 -- Managing MoDNR Voluntary Cleanup Program (VCP) sites, NPDES permit applications, or lead contamination assessment projects in Southeast Missouri. PE licensure obtained. Burns & McDonnell's environmental practice offers particularly strong early career development given the firm's national scale and diverse project portfolio.
• Senior Environmental Engineer (6-12 years): $90,000-$115,000 -- Leading complex environmental programs. Senior environmental engineers at Burns & McDonnell's Kansas City headquarters manage major national environmental compliance programs for industrial and utility clients. MoDNR senior staff lead the state's major water quality and remediation programs.
• Principal / Practice Director (12+ years): $115,000-$148,000+ -- Consulting firm practice leadership at Burns & McDonnell, AECOM, or CDM Smith's Missouri offices, or MoDNR division director roles. Burns & McDonnell's employee-ownership model makes senior positions at the firm particularly financially attractive.

Burns & McDonnell as Career Anchor: Burns & McDonnell -- headquartered in Kansas City and consistently ranked among the nation's top environmental and engineering consulting firms -- is Missouri's most significant environmental engineering employer. The firm's employee-ownership model (100% employee-owned), strong compensation and benefits, and national project portfolio make it one of the most attractive environmental engineering employers in the central U.S. Environmental engineers who build careers at Burns & McDonnell develop credentials that are recognized across the national environmental consulting market.

Missouri's $76,000 average environmental engineering salary is near the national average and Missouri's low cost of living -- particularly in St. Louis and the smaller cities of the state -- provides strong effective purchasing power. Missouri has a graduated income tax (ranging to 4.95%) -- among the lower state rates nationally. Kansas City Metro: Missouri's primary environmental engineering market, driven by Burns & McDonnell and the Kansas City metro's industrial and government environmental programs. Environmental engineering salaries of $76,000-$118,000 for experienced engineers. Cost of living in Kansas City is approximately 10-18% below the national average. Median home prices of $230,000-$340,000 in desirable KC suburbs (Leawood, Lee's Summit, Overland Park, Kansas side). St. Louis Metro: Missouri's second-largest market. Consulting, Boeing, and government environmental engineering at $74,000-$112,000 with a cost of living 10-18% below the national average. St. Louis is among the most affordable major metros in the nation for professional homeownership -- median home prices of $200,000-$320,000 in desirable St. Louis County communities are exceptional. Southeast Missouri (Lead Belt): Mining environmental engineering and lead remediation consulting at $70,000-$100,000 in small communities with very affordable cost of living. MoDNR Government Salaries: MoDNR environmental engineering roles range from approximately $55,000-$78,000 for staff engineers, with supervisory roles reaching $78,000-$98,000. Missouri state employees receive the Missouri State Employees Retirement System (MOSERS) defined benefit pension and state health insurance.

The Missouri Board for Architects, Professional Engineers, Professional Land Surveyors, and Landscape Architects administers PE licensure for environmental engineers. Missouri's process is efficient and the state has streamlined reciprocity with Kansas, Illinois, and other neighboring states. Missouri PE Licensure Pathway:

• FE and PE Exams: Standard NCEES process. Missouri University of Science and Technology (Rolla -- excellent environmental engineering program with historic connections to Missouri's mining industry), University of Missouri Columbia, Washington University in St. Louis, and University of Missouri Kansas City prepare Missouri's environmental engineering pipeline. Missouri S&T's environmental engineering program is nationally ranked and has particularly strong connections to the Southeast Missouri mining environmental community.
• 4 Years of Progressive Experience: Under PE supervision across water quality, contaminated site remediation, mining environmental, and air quality disciplines.
• PE Environmental or Civil Engineering Exam: Standard NCEES exams accepted.

Missouri-Specific Regulatory Credentials: MoDNR Voluntary Cleanup Program (VCP) procedures -- Missouri's risk-based voluntary cleanup framework for contaminated sites, including MoDNR's Risk Assessment Guidance and the Brownfields/Voluntary Cleanup Program's Certificate of Completion process. Missouri Lead Rule (10 CSR 26-1) -- Missouri has specific state regulations for lead-based paint abatement and lead-containing waste that go beyond federal TSCA Section 402/404 requirements, relevant for engineers working on lead contamination cleanup in Missouri's mining communities. Missouri Clean Water Law (MCWL) -- Missouri's state water quality law and MoDNR's construction permit (land disturbance permit) requirements for stormwater. Key Professional Certifications: CHMM -- valuable for Missouri's lead mining, industrial hazardous waste, and Superfund practice. CPESC -- important for Missouri's active highway and construction environmental compliance market. HAZWOPER 40-hour -- required for Southeast Missouri lead mining Superfund site work and Kansas City industrial remediation.

Missouri's environmental engineering outlook is stable to positive -- the state's lead remediation legacy provides a sustained baseline workload, Kansas City's corporate growth is driving stormwater and brownfield environmental engineering, and federal infrastructure investment is supporting water quality improvements across the Missouri River basin. Lead Remediation in Southeast Missouri: The historical lead mining district in Southeast Missouri -- including the communities of Herculaneum (former Doe Run smelter city), Boss, Glover, and surrounding communities -- has decades of continued remediation and monitoring work ahead. Residential yard soil cleanup, mine tailings (chat) removal, and groundwater monitoring programs in the Lead Belt will employ environmental engineers for many years. Missouri River Water Quality: The Missouri River's water quality management -- addressing agricultural nonpoint sources of nitrogen and phosphorus, managing Clean Water Act Section 404 permits for floodplain development, and implementing the Missouri River Recovery Program for endangered species -- is a multi-billion-dollar federal-state environmental program that engages environmental engineers in permit applications, biological assessments, and adaptive management monitoring across the length of the Missouri River in the state. Kansas City Urban Development: Kansas City's remarkable urban renaissance -- including Streetcar corridor development, the crossroads arts district redevelopment, and industrial area brownfield conversion -- is driving consistent demand for environmental engineering in Phase I/II site assessment, VCP-governed cleanup, and brownfield grant program management. PFAS at Military Sites: Whiteman AFB (Sedalia) and the former Richards-Gebaur Air Force Base site (Kansas City) have PFAS investigations from AFFF use -- creating new environmental engineering investigation workscopes. Workforce Projection: Environmental engineering employment in Missouri is expected to grow 5-7% over the next five years, with Kansas City urban development and federal infrastructure investment as the primary growth drivers.

Environmental engineering in Missouri is grounded in the practical realities of a state shaped by two great rivers, a century of lead mining, and the steady work of keeping Missouri's waterways clean enough for fishing, swimming, and drinking. At Burns & McDonnell (Kansas City): An environmental engineer on a Wednesday morning might begin by reviewing air dispersion modeling results for a refinery stack emissions permit application -- using AERMOD to evaluate whether a proposed process heater modification will cause violations of the NAAQS for NO2 or SO2 in the surrounding community. After the modeling review, the engineer is on a call with a utility client regarding the closure plan for a coal ash impoundment at a former power plant on the Missouri River -- reviewing MoDNR's Solid Waste Management Program requirements for coal combustion residual (CCR) impoundment closure and coordinating the groundwater monitoring network design. Afternoon involves reviewing a Phase II Environmental Site Assessment report for a former machine shop in the crossroads district of Kansas City that a developer is converting to mixed-use residential -- evaluating whether the petroleum and solvent contamination found in soil borings requires MoDNR VCP enrollment before building permits can be issued. At MoDNR (Jefferson City): A MoDNR water quality engineer might spend a morning reviewing a NPDES permit renewal application for a beef processing facility on the Osage River -- evaluating whether the proposed effluent limits are consistent with Missouri's water quality standards for dissolved oxygen, ammonia, and fecal coliform. Afternoon involves reviewing a land disturbance permit application for a highway widening project, assessing whether the applicant's erosion control plan meets MoDNR's land disturbance permit requirements. Missouri Lifestyle: Missouri environmental engineers enjoy a genuinely affordable, substantive quality of life -- Kansas City's world-famous barbecue and jazz heritage, St. Louis's underappreciated restaurant scene and world-class art museum, the Ozarks' extraordinary clear rivers (the Current River, Jacks Fork) for canoeing and fishing, and the Table Rock Lake area for summer recreation all contribute to a lifestyle that consistently surprises engineers who arrive expecting a featureless flyover state.