What Wessler Engineering does

Wessler Engineering is a privately held, water infrastructure engineering consulting firm founded in 1975 and headquartered in Indianapolis, Indiana. The firm provides specialized civil and environmental engineering services across wastewater treatment, drinking water distribution, stormwater management, electrical engineering, instrumentation and controls (SCADA), GIS mapping, field services, survey, structural, and construction administration. Its customer base consists primarily of municipal governments, water and wastewater utilities, MS4 communities, and select industrial clients, concentrated in Indiana and Ohio. The firm currently operates from eight office locations across the two states, employs between 101 and 250 people, and is in its 50th year of operation.

The firm delivers professional engineering services on a project-based engagement model, working with public-sector clients through long-term, relationship-based engagements typically initiated via RFP/RFQ processes. Technical capabilities include SCADA system design and integration, RovverX sewer camera inspection, GIS infrastructure mapping, drone-based stormwater inspection, and the Outfall Inspection App — a smartphone tool for MS4 General Permit compliance tracking. The portfolio spans master planning through construction administration, with deep expertise in regulatory regimes including EPA, NPDES, MS4, PFAS, and Lead and Copper Rule compliance. Notable projects include a $130 million stormwater and deicing capacity program for the Indianapolis Airport Authority enabling a $1.3 billion FedEx expansion, and City of Lawrence Utilities water treatment improvements that doubled plant capacity from 2 MGD to 4.32 MGD.

The business is led by CEO Marty Wessler, P.E., with Dylan Lambermont, P.E., LEED AP, serving as President since 2024 after 14 years under predecessor Brent Siebenthal. Wessler has been recognized as a Best Places to Work in Indiana for ten consecutive years through 2021 and has received ACEC Indiana Grand Project and State Finalist awards. The firm is founder/family-controlled with no disclosed institutional investment and remains independent since its founding.

Name

Wessler Engineering

Legal name

Wessler Engineering

Website

https://wesslerengineering.com

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

101–250 employees

Short description

Wessler Engineering is a privately held, Indianapolis-based water infrastructure engineering consulting firm serving municipal governments, water/wastewater utilities, and select industrial clients across Indiana and Ohio with planning, design, regulatory, and construction administration services.

Ownership category

akta.pro rank

Product category

Water Infrastructure Engineering Services

NAICS

Engineering Services (541330), Engineering Services (54133)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industries

Hydraulic Modeling & System Optimization (Calibration, Minimum Night Flow, Demand Analysis) (EUANAKAM), Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE), Water, Wastewater & Stormwater Compliance (BPAHAJAJ)

Keywords

• Water infrastructure engineering
• Wastewater treatment consulting
• Drinking water distribution
• Stormwater management services
• GIS mapping utilities

Headquarters

HQ city

Indianapolis

HQ country

United States

HQ region

North America

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Professional engineering consulting services including master planning, design, construction administration, and asset management for water infrastructure projects. Revenue generated through project-based engagements with municipalities and government clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Wessler Engineering is a water infrastructure engineering consulting firm providing civil and environmental engineering services for municipal and government clients. Its offerings span wastewater treatment and collection, drinking water distribution and treatment, stormwater management, MS4 compliance, electrical engineering, instrumentation and controls (including SCADA), GIS mapping, field services, construction administration, structural engineering, and survey services. Projects range from master planning and feasibility studies through detailed design and construction administration for water, wastewater, and stormwater infrastructure.

Product overview

Wessler Engineering is a water infrastructure engineering consulting firm offering a comprehensive suite of services organized around wastewater, drinking water, stormwater, and related civil engineering disciplines. The core service portfolio includes Construction Services, Drinking Water Distribution, Electrical Services, Environmental Services, Field Services, GIS Mapping, Instrumentation & Controls (I&C), Stormwater Services, Structural Engineering, Survey Services, and Wastewater Services. Beyond traditional engineering consulting, the firm also provides specialized digital tools including an Outfall Inspection App for mobile field inspections, sewer camera services using RovverX technology, and Revit-based visualization for pre-construction project planning. The company also offers training programs and educational resources including webinars on MS4 compliance, SCADA systems, arc flash safety, water loss audits, and lead service line replacements. The portfolio is delivered through multiple office locations across Indiana and Ohio, serving municipal clients, government agencies, and private utilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Wastewater Services Collections and treatment engineering services for municipal wastewater systems, covering wastewater treatment plant design, lift stations, force mains, and collection systems for cities, towns, and water utilities.
• Drinking Water Distribution Engineering services for municipal drinking water distribution systems serving residential, commercial, and industrial consumers, including treatment plant design, wellhead protection, hydraulic modeling, and lead service line replacement programs.
• Stormwater Services Stormwater drainage project design with sustainable design options and environmental considerations, including MS4 compliance support, green infrastructure, and CSO long-term control planning for municipalities.
• Electrical Services Full range of electrical engineering services for projects of all sizes with a focus on energy efficiency, supporting lift stations, pump stations, water/wastewater plants, and treatment facility electrical upgrades.
• Instrumentation & Controls (I&C) / SCADA Systems Design, programming, and integration services for SCADA systems and controls for water, wastewater, and industrial process facilities, optimizing interactions between process and operator.
• GIS – Geographic Information System Mapping Infrastructure data management, mapping, and analysis services for water and wastewater utilities to support utility asset management, system planning, and decision-making.
• Environmental Services Environmental management planning, stormwater pollution prevention, SPCC plans, SWPPPs, NPDES permitting, wetland/waterway/floodplain permitting, risk and resilience assessments, and consumer confidence reports.
• Field Services Field inspections to determine effective and cost-efficient ways to improve the operation and function of sewer systems, including sanitary sewer inspection, inflow/infiltration studies, and sewer camera investigations using RovverX technology.
• Construction Services Construction administration and oversight services providing input into the construction process, engaging with projects long before construction begins through completion.
• Structural Engineering Structural engineering solutions for failing structures, focused on public safety and cost management for municipalities.
• Survey Services Survey data collection and analysis to support accurate project planning and prevent costly delays.
• Outfall Inspection App Smartphone-based application used to track outfall inspections and document compliance with MS4 General Permit requirements for municipal stormwater communities.

Quantifiable outcome

• Expanded City of Lawrence water treatment capacity from 2 MGD to 4.32 MGD
• +2 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Design OutreachminorOthersChristian nonprofit organization dedicated to creating solutions for clean water, sanitation, and medical support in low-income countries. Wessler team members participate in volunteer missions to help bring clean water to rural villages.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Brown and Caldwell: National water and wastewater engineering consulting firm (headquartered in Walnut Creek, CA) offering planning, design, and construction services to municipal utilities. Direct peer in Wessler's core market of municipal water/wastewater consulting.
• Hazen and Sawyer: Mid-sized water and wastewater engineering firm focused on municipal utilities, with strong East Coast and Southern presence. Closely comparable as a specialist consulting firm serving similar drinking water and wastewater clients.
• Greeley and Hansen: Specialist water, wastewater, and solid waste engineering consulting firm serving municipal clients across the U.S. Direct comparable on service mix (planning, design, construction management) and municipal client base.

Broad incumbents

• CDM Smith: Global engineering and construction firm with prominent water and environmental practice serving municipal and federal clients. Significantly larger enterprise that overlaps with Wessler's water infrastructure focus but operates across broader markets.
• Stantec: Major global design and consulting firm with substantial North American water practice serving municipal water/wastewater utilities. Competes in overlapping RFPs for mid-sized municipal engagements.
• Black & Veatch: Global infrastructure company with deep water/wastewater utility practice and specialty in treatment plant design. Competes with Wessler for municipal and industrial water mandates, especially at the larger end.
• Arcadis: Global design and consultancy firm with significant U.S. water practice serving utilities and municipalities. Competes with Wessler on larger municipal water and stormwater engagements.
• Jacobs Solutions: Global professional services firm with substantial water and advanced facilities practice serving municipal utilities. Competes on larger municipal water/wastewater mandates at scale Wessler cannot match.

Regional players

• Donohue & Associates: Midwest-focused (Indiana/Wisconsin/Illinois/Kentucky) water, wastewater, and stormwater engineering consulting firm serving municipal clients. Direct geographic and service overlap with Wessler in Indiana.
• Short Elliott Hendrickson (SEH): Upper Midwest-focused engineering, architectural, and planning firm with strong water/wastewater practice. Comparable Midwest regional consulting model with similar municipal client base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/WesslerEng

Revenue estimate

Valuation estimate

Number of profiles

Profiles11 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 Wessler Engineering