Trotter and Associates

What Trotter and Associates does

Trotter and Associates, Inc. (TAI) is a privately held, full-service civil engineering consulting firm founded in 1999 and headquartered in St. Charles, Illinois. The firm provides planning, design, and construction engineering services across twelve integrated service lines — civil engineering design, construction administration, electrical engineering, municipal engineering design, parks and recreation, planning and mapping (GIS), structural engineering, subdivision and development review, transportation engineering, wastewater engineering, water engineering, and watershed/stormwater management. TAI's core technology stack is built on standard AEC tooling: WaterCAD V8i from Bentley for water-distribution modeling and Esri ArcGIS Desktop for infrastructure mapping, utility master planning, asset management, and hydrologic/hydraulic analysis. The firm operates as a B2B professional services business on fee-based project contracts with no publicly disclosed pricing and revenue model described as professional services / engineering consulting.

TAI's customer base is exclusively municipal: the firm serves as appointed or consulting engineer to over 30 units of local government in northeastern Illinois and is a trusted partner to over 80 municipalities across northern Illinois and southern Wisconsin. Named clients include the City of Batavia ($42.6M WWTF Phase 2A), City of Woodstock ($28.3M roadway program), Village of Fox Lake (lead service line replacement), City of Burlington WI, Fox Metro Water Reclamation District, City of St. Charles, Village of Addison, Village of Roselle, Village of Sussex WI, Village of Algonquin, and City of North Chicago. Service delivery is direct and relationship-led, with no third-party channels, and supplemented by go-to-market presence through professional-association leadership (WEF, APWA, AWWA Wisconsin Section) and industry events.

The firm employs 11-50 people across four offices — St. Charles (HQ), Fox Lake, Oak Brook (all Illinois), and Lake Geneva (Wisconsin) — with a fifth location announced. Key leaders include founder Scott Trotter, P.E., BCEE and Aaron Berry, P.E., MBA. Revenue is not publicly disclosed. Performance differentiators cited are practical field experience across all engineers, an integrated design-to-construction team model producing change orders below 1.5% (vs. 7% industry average), and depth of regulatory relationships with IEPA, IDOT, county DOTs, and EPA Region V (which designated TAI's Algonquin BNR facility a model plant).

Name

Trotter and Associates

Legal name

Trotter and Associates, Inc.

Website

https://trotter-inc.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

Trotter and Associates is a privately held civil engineering consulting firm providing planning, design, and construction engineering services for water, wastewater, transportation, and stormwater infrastructure to over 80 municipalities across northern Illinois and southern Wisconsin.

Ownership category

akta.pro rank

Headquarters

HQ city

Saint Charles

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

Revenue model

1. Engineering Consulting Services: Professional engineering and consulting services for municipal infrastructure including planning, design, and construction engineering. Revenue generated through fee-based service contracts with municipal and governmental clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Trotter and Associates, Inc. (TAI) is a full-service civil engineering consulting firm that provides planning, design, and construction engineering services for municipal infrastructure development and rehabilitation. The firm serves over 80 municipalities across northern Illinois and southern Wisconsin, specializing in water, wastewater, transportation, stormwater, structural, and parks/recreation infrastructure projects. All services are delivered through in-house professional staff including engineers, construction managers, surveyors, inspectors, and drafting technicians.

Product overview

Trotter and Associates, Inc. (TAI) is a full-service civil engineering firm structured as a single integrated service platform for municipal infrastructure development and rehabilitation. The firm offers twelve distinct but interrelated engineering service lines that work together to deliver comprehensive municipal infrastructure solutions: Civil Engineering Design, Construction Administration, Electrical Engineering, Municipal Engineering Design, Parks & Recreation, Planning & Mapping (GIS), Structural Engineering, Subdivision & Development Review, Surveying Services, Transportation Engineering, Wastewater Engineering, Water Engineering, and Watershed/Stormwater Management & Drainage Engineering. The core offering centers on municipal water and wastewater infrastructure expertise, supplemented by civil site design, transportation, and stormwater management services. All services are delivered through experienced professional staff including engineers, construction managers, surveyors, inspectors, and drafting technicians. TAI serves over 80 municipalities throughout northern Illinois and southern Wisconsin from offices in St. Charles, IL (corporate), Fox Lake, IL, Oak Brook, IL, and Lake Geneva, WI.

Differentiator

Problem solved

Functional benefit

Products and services

• Civil Engineering Design Provides water distribution and sanitary collection system design ranging from transmission mains to distribution systems and force mains to gravity sewers, with expertise in utility coordination and permitting with Illinois EPA.
• Construction Administration Provides construction engineering services for all aspects of public improvements from roadway to wastewater treatment facility construction, including construction management, inspection, resident engineering, and construction layout. Maintains a change order rate below 1.5% compared to the industry average of 7%.
• Electrical Engineering Offers electrical engineering and consulting services including power system design, backup power solutions, power quality enhancements, and power systems analysis using latest software for short circuit analysis, coordination studies, and arc flash analysis.
• Municipal Engineering Design Provides municipal engineering services to over thirty units of local government in northeastern Illinois, including general consultations, grant writing, project funding assistance, subdivision and development plan reviews, GIS services, land surveying, and capital improvement planning.
• Parks & Recreation Works with park districts in design of active and passive recreation facilities including athletic fields, tennis courts, baseball diamonds, soccer fields, and multi-use fields, with experience in comprehensive park planning.
• Planning & Mapping (GIS) Provides GIS services including infrastructure mapping, utility master planning, parcel and boundary mapping, asset management, geodatabase development, water and sanitary sewer modeling, road inventory and PASER analysis, and hydrologic and hydraulic analysis using Esri's ArcGIS Desktop.
• Structural Engineering Provides structural engineering services including structural repairs, building restoration, repurposing of existing facilities, plant expansion and new structures, bridge inspections, earth retention structure design, and construction engineering services.
• Subdivision & Development Review Provides effective and efficient development review services with staff having municipal work experience as both consultant and municipal employee, covering concept and preliminary plat, final plat, and construction phase review.
• Transportation Engineering Prepares plans and specifications for large transportation projects including roadway reconstruction, widening, and resurfacing, with expertise in traffic calming devices, pedestrian safety features, and green engineering practices like permeable pavers and bio-swales.
• Wastewater Engineering Provides complete wastewater engineering services including planning, design, and construction supervision with direct experience in membrane treatment systems and biological nutrient removal (BNR). The Algonquin 5-stage BNR facility was highlighted by USEPA as a model plant for future nutrient removal facilities.
• Water Engineering Provides comprehensive water system engineering services including water system master planning and modeling using WaterCAD V8i, water distribution design, water supply and storage design, and water treatment engineering including radium removal and HMO filtration systems.
• Watershed, Stormwater Management & Drainage Engineering Provides stormwater engineering and floodplain management services with staff holding Certified Floodplain Manager credentials, completing all facets of planning, design, permitting, and construction oversight of stormwater projects from parcel-scale BMPs to large scale watershed planning.
• Surveying Services Provides land surveying services as part of the municipal engineering service offerings.

Quantifiable outcome

• Change order rate below 1.5% vs 7% industry average
• +2 more outcomes

Named customers13 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• City of North ChicagocoreOthersLong-term municipal client partnership with City of North Chicago, including securing $7 million in IDOT LPF state funding for Argonne Drive Reconstruction project ($18.3 million total initiative)

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• AECOM: Global infrastructure consulting firm with deep municipal water, wastewater, and transportation practices that competes for larger municipal contracts across the same geographies as Trotter.
• Jacobs: Global professional services firm with large water and transportation practices that bid into the Midwest municipal market, representing scale-driven competitive pressure on regional incumbents.
• Stantec: Global engineering consultancy with extensive municipal water and wastewater practice, increasingly active on mid-size municipal RFPs that historically went to regional firms like Trotter.

Direct peers

• Clark Dietz: Regional civil engineering consultancy headquartered in Illinois with municipal water, wastewater, transportation, and electrical practices, matching Trotter's full-service municipal model across the Midwest.
• Manhard Consulting: Civil engineering and land surveying firm with municipal infrastructure capabilities across the Midwest, competing for similar municipal engineering and development review engagements.
• Donohue & Associates: Midwest-focused water, wastewater, and transportation engineering firm serving municipal and industrial clients, comparable in technical emphasis on water resource and treatment plant work.
• Ruekert & Mielke: Wisconsin-based municipal engineering and land surveying firm with strong water/wastewater and stormwater practices, directly comparable to Trotter's southern Wisconsin operations and client type.
• Baxter & Woodman: Midwest-based civil engineering and municipal infrastructure consulting firm serving water, wastewater, stormwater, and roadway clients across Illinois and Wisconsin — directly comparable in geography, client base, and service mix.
• Christopher B. Burke Engineering: Large Illinois civil engineering firm with deep municipal water, wastewater, and stormwater practices, competing for many of the same municipal engagements in northeastern Illinois.
• Hampton Lenzini & Renwick (HLR): Illinois-based civil engineering firm providing municipal water, wastewater, transportation, and structural services to local governments — overlapping geography and service portfolio with Trotter.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/trotter-and-associates-inc.
• Facebookfacebook.com/Trotter-and-Associates-Inc-100067865499666

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Trotter and Associates