What RJN Group does

RJN Group, Inc. is a U.S.-based professional engineering consulting firm specializing in water, wastewater, and stormwater infrastructure, founded in 1975 by Richard J. Nogaj as RJN Environmental Associates in Wheaton, Illinois, and operated since 1995 as a 100% employee-owned corporation under the holding name RJN Group, Inc. The firm is headquartered in Downers Grove, Illinois, with offices spanning Chicago to Houston to Baltimore, and serves municipalities, water reclamation authorities, and regional stormwater agencies primarily under project-based consulting engagements that comply with EPA consent orders, state mandates, and capacity-planning requirements.

The company's technical stack centers on the proprietary RJN Clarity platform—a cloud-based analytics layer that delivers live hydraulic and condition-assessment data with spatial visualization and real-time analytics—and a suite of field-assessment technologies including AVA (Advanced Vibroacoustic Assessment) for non-excavation water main diagnostics, multi-sensor force main inspection (acoustic, leak detection, magnetic flux, hydrostatic), and CCTV-based condition assessment augmented through a 2025 strategic partnership with SewerAI for AI-driven defect detection. Service lines extend across wastewater, stormwater, clean water, flow monitoring (98% average uptime), asset management (1,350 programs developed), hydraulic modeling, I/I reduction (175+ regulatory-driven programs), design services (9.9M LF designed), and master planning supporting $826M in constructed assets.

RJN generates revenue exclusively through professional engineering services contracts with government entities—no consumer or commercial product revenue is disclosed. The go-to-market is enterprise field sales through regional VPs and account managers, supplemented by thought-leadership marketing (Knowledge Hub blog, case studies, WEF/APWA conference presence). Pricing is custom-quoted per project; no public pricing or revenue disclosures exist. The firm sits on the ENR Top 200 Environmental Firms and Top 500 Design Firms lists and ranked #18 on the Trenchless Technology Top 50 list in 2025.

Name

RJN Group

Legal name

RJN Group, Inc.

Website

https://rjn.com

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

101–250 employees

Short description

RJN Group is a 100% employee-owned U.S. engineering consulting firm that helps municipalities and water authorities assess, design, and manage aging water, wastewater, and stormwater infrastructure using proprietary technologies and field-assessment services.

Ownership category

akta.pro rank

Product category

Water Infrastructure Engineering Services

NAICS

Environmental Consulting Services (54162), Environmental Consulting Services (541620), Sewage Treatment Facilities (22132), Custom Computer Programming Services (541511)

SIC

Services-Engineering, Accounting, Research, Management (8700), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Water & Wastewater Compliance (NPDES/Stormwater, Pretreatment, Drinking Water/SDWA) (EUAHABAB), Data Management, LIMS & Compliance Software (ELN, eDMS, reporting automation) (EUANAJAE), Real-Time Monitoring & Smart Stormwater (Sensors, SCADA/IoT, RTC) (EUANAEAK), Water, Wastewater & Stormwater Compliance (BPAHAJAJ)

Keywords

• Water infrastructure engineering
• Wastewater consulting services
• Stormwater management solutions
• Pipeline condition assessment
• Municipal hydraulic modeling

Headquarters

HQ city

Wheaton

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Professional Engineering Consulting Services: Project-based engineering consulting engagements with municipalities and government water utilities for infrastructure assessment, design, master planning, and construction management services.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

RJN Group provides professional engineering consulting services for municipal water, wastewater, and stormwater infrastructure. Its portfolio spans assessment, design, master planning, hydraulic modeling, flow monitoring, asset management, inflow & infiltration reduction, and rehabilitation, anchored by its proprietary RJN Clarity data analytics platform and proprietary AVA acoustic water main assessment technology. Services are delivered as project-based engagements to cities, villages, water reclamation authorities, and government utilities.

Product overview

RJN Group offers a portfolio of water infrastructure engineering consulting services organized around its core platform, RJN Clarity. RJN Clarity serves as the central data analytics platform delivering live hydraulic and condition assessment data with real-time analytics. The portfolio includes specialized assessment services (AVA for acoustic water main assessment, Field Services for CCTV and condition inspections) that feed data into Clarity, and complementary service modules covering wastewater, stormwater, clean water, asset management, inflow/infiltration reduction, design services, master planning, hydraulic modeling, and flow monitoring. The company operates as a 100% employee-owned professional engineering firm serving municipal clients across the country.

Differentiator

Problem solved

Functional benefit

Products and services

• RJN Clarity A proprietary cloud-based data analytics platform delivering live hydraulic and condition assessment data with spatial visualization and real-time analytics for water and wastewater infrastructure management. Available to municipal utilities and water authorities seeking actionable intelligence for capital and maintenance planning.
• AVA (Advanced Vibroacoustic Assessment) Innovative acoustic technology for water main condition assessment that detects anomalies and defects without excavation, helping determine whether to repair or replace aging water mains. For municipal water utilities facing water main replacement and renewal decisions.
• Wastewater Services Comprehensive wastewater collection system management including planning, study, design, and improvement of sewer assets to ensure regulatory compliance and community service. For municipal utilities, cities, and villages operating sewer collection systems.
• Stormwater Services Stormwater asset management including condition evaluation, drainage flow analysis, funding identification, and improvement design to minimize community impacts. For municipalities addressing stormwater flooding, drainage, and regulatory requirements.
• Clean Water Services Water distribution system services including hydrant and valve exercising, in-pipe assessments, and design to construction management for reliable water services. For municipal water utilities and water authorities seeking distribution system integrity and non-revenue water loss reduction.
• Asset Management Risk-based system analysis delivering actionable intelligence for reduced costs through informed maintenance and rehabilitation programs. For municipal utilities operating aging water and wastewater infrastructure seeking longest asset life cycles at lowest cost.
• Field Services Field inspection services including CCTV review, condition assessments, asset inventories, and data collection for capital and maintenance planning. For municipalities and authorities requiring reliable underground infrastructure condition data.
• Inflow & Infiltration Reduction Tailored inflow & infiltration (I/I) reduction programs using proven investigation techniques, I/I quantification routines, and risk analytics to restore design capacity and reduce treatment costs. For municipalities facing aging sewer systems and regulatory compliance mandates.
• Design Services Award-winning design engineering using no-dig and traditional construction methodologies for pipeline and manhole rehabilitation, service expansion, strategic storage integration, and flow redirection. For municipalities needing practical, value-driven rehabilitation and improvement designs.
• Master Planning Comprehensive infrastructure planning combining research, analysis, and data-driven forecasting to predict infrastructure requirements for long-term community needs. For municipalities and regional authorities executing multi-decade capital improvement programs.
• Hydraulic Modeling Expert analysis of hydraulic and hydrologic characteristics impacting performance and optimization strategies for water, stormwater, and wastewater systems. For utilities making short- and long-range decisions on system capacity and performance.
• Flow Monitoring Network design and management using flow meters, level sensors, rain gauges, and groundwater gauges to produce high-quality hydraulic data for system studies, design verifications, master planning, regulatory monitoring, billing, and capital planning. For utilities requiring reliable hydraulic data at 98% uptime average.

Quantifiable outcome

• Average 30% reduction in I/I achieved for Little Rock Water Reclamation Authority
• +5 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

AI capability7 records

Feature5 records

Partnerships

Three partnerships are on record, tiered minor and core.

• American RiversminorOthers · 1 January 2025RJN Foundation made a $50,000 grant to American Rivers to support the removal of the Cypress Branch Dam in Millington, MD as part of RJN's 50th anniversary celebration. This is a charitable/philanthropic partnership focused on environmental restoration.
• SewerAIcoreTechnology or IntegrationStrategic implementation partnership with SewerAI, a global leader in AI-driven sewer inspection technologies. The partnership integrates SewerAI's AutoCode and Sewer3D tools with RJN's engineering and field inspection expertise and Clarity platform to deliver faster, more accurate assessments and data-backed plans for clients. This formalizes a multi-year collaboration to accelerate AI-driven sewer infrastructure assessments.
• KenWavecoreTechnology or IntegrationPartnership to revolutionize the drinking water distribution industry by combining RJN's water infrastructure engineering expertise with KenWave's specialty technologies for water main assessment and condition evaluation.

Scale indicators13 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Arcadis: Global design, engineering, and consulting firm with water and asset management practices serving municipal utilities. Competes with RJN on master planning, hydraulic modeling, and rehabilitation programs at greater scale.
• Tetra Tech: Large global consulting and engineering firm with leading water practice serving municipal and federal clients. Competes with RJN on municipal water, wastewater, and stormwater programs but offers a much broader multi-disciplinary portfolio.
• AECOM: Global infrastructure consulting firm with a sizable water business addressing municipal utilities on conveyance, treatment, and program management. Overlaps with RJN on large municipal water infrastructure mandates but at much greater scale and geography.
• Black & Veatch: Major engineering, procurement, and construction firm with a top-tier water practice serving utilities on treatment, conveyance, and condition assessment. Competes on large municipal programs but at substantially greater scale.
• CDM Smith: Global engineering and construction firm with a water and environment practice serving municipal clients on collection system, treatment, and stormwater projects. Comparable on municipal wastewater master planning and consent order engagements.
• Stantec: Global engineering and consulting firm with municipal water practice covering wastewater, water, and stormwater infrastructure. Comparable consulting model but operating across a much broader geographic and service portfolio than RJN.
• Jacobs Solutions: Global professional services firm with deep water and environmental practice serving municipal water utilities and federal agencies. Competes on major program management and consent decree engagements alongside RJN's specialty services.

Direct peers

• Carollo Engineers: Pure-play water engineering consulting firm serving municipal clients on water, wastewater, and reuse projects. Highly comparable specialty consulting footprint, project-based delivery model, and reliance on regulatory-driven capital programs.
• Brown and Caldwell: Specialty water and environmental engineering consulting firm with comparable focus on municipal wastewater, water, and stormwater infrastructure. Both firms specialize narrowly in water utilities and compete on consent order compliance, master planning, and design services.
• Hazen and Sawyer: Water and wastewater focused civil/environmental engineering firm with longstanding municipal client base. Closely overlapping with RJN on SSO/CSO mitigation, hydraulic modeling, and collection system rehabilitation services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/rjn-group

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about RJN Group