What Terra Consulting Group does

Terra Consulting Group is a U.S.-based professional services firm specializing in engineering design, site acquisition and real estate services, and architectural/engineering design for telecommunications and wireless infrastructure. Founded in 1995 and headquartered in Park Ridge, Illinois, the firm operated with a workforce of 51-100 employees delivering three core service lines: Engineering Design & Industrial Architectural Services; Site Acquisition, Management & Real Estate Services; and Telecommunications Architectural & Engineering Design Services. Its client base spans infrastructure development and wireless network deployment projects across the United States, with engagements executed by licensed Professional Engineers including John J. Zimmermann (Senior Manager, Business Development) and Tom Zimmermann (Geographic Discipline Leader).

In May 2025, Terra Consulting Group was acquired by Colliers Engineering & Design, a strategic operating company within the Colliers organization. Following the acquisition, the firm was fully integrated and rebranded under the Colliers Engineering & Design brand, completing the transition in 2026. The rebrand consolidates operations, expands national footprint in wireless and infrastructure design, and broadens service capability through Colliers' multi-discipline platform. The firm also extends beyond its telecom core, evidenced by a 2026 engagement with Nio Strategic Metals Inc. for environmental and public safety consulting on the Oka niobium project in Quebec.

Revenue model details, pricing structures, and customer concentration are not disclosed in available source material. No AI/ML capabilities, proprietary technology platforms, or software products are described. The business model is consistent with project-based professional consulting — fees tied to engineering hours, site acquisition work, and design deliverables — rather than recurring SaaS or licensed product revenue. As a now-integrated division of Colliers Engineering & Design, Terra no longer operates as a standalone commercial entity; growth signals, customer relationships, and competitive positioning are increasingly functions of the parent's platform.

Name

Terra Consulting Group

Legal name

Terra Consulting Group

Website

https://terraltd.com

Company type

Private

Founded year

1995

Operating status

Acquired

Headcount range

51–100 employees

Short description

Terra Consulting Group is a U.S. professional services firm delivering engineering design, site acquisition, and telecommunications architectural/engineering services for wireless and infrastructure clients. Founded in 1995 and based in Park Ridge, IL, it was acquired by Colliers Engineering & Design in May 2025 and fully rebranded in 2026.

Ownership category

akta.pro rank

Product category

Engineering & Infrastructure Consulting

NAICS

Other Scientific and Technical Consulting Services (54169), Other Scientific and Technical Consulting Services (541690), Offices of Real Estate Agents and Brokers (5312), Management Consulting Services (54161)

SIC

Services-Engineering Services (8711), Real Estate Agents & Managers (For Others) (6531)

akta.pro primary industry

Real Estate Development & Feasibility Advisory (Highest-and-Best-Use, Entitlements Support) (BPAJANAC)

akta.pro secondary industry

Real Estate Strategy & Portfolio Consulting (Corporate/Institutional) (BPAJANAB)

Keywords

• Land development consulting
• Engineering design services
• Telecommunications infrastructure
• Site acquisition services
• Wireless infrastructure design

Headquarters

HQ city

Park Ridge

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Core offering

Terra Consulting Group is a professional consulting firm providing engineering design, industrial architectural services, site acquisition and real estate services, and specialized telecommunications architectural and engineering design services. Following its May 2025 acquisition by Colliers Engineering & Design and 2026 rebrand, the firm delivers integrated infrastructure solutions nationwide, with emphasis on wireless and telecommunications infrastructure.

Product overview

Terra Consulting Group, now operating as Colliers Engineering & Design following a May 2025 acquisition, offers an integrated suite of engineering and design services. The portfolio comprises three core service offerings: Engineering Design & Industrial Architectural Services, Site Acquisition Management & Real Estate Services, and Telecommunications Architectural & Engineering Design Services. These services work together to deliver end-to-end solutions for clients nationwide, with particular emphasis on wireless and telecommunications infrastructure.

Differentiator

Problem solved

Functional benefit

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Two partnerships are on record, tiered core and flagship.

• Nio Strategic Metals Inc.coreImplementation/ SI/ Consulting Partner · 22 May 2026Terra Consulting (through Guy Arbour) was engaged by Nio Strategic Metals Inc. as a partner for environmental and public safety consulting services on the Oka niobium project in Quebec. This engagement is part of Nio's strategy to line up specialized partners for the project, with Terra providing expertise in environmental and public safety matters.
• Colliers Engineering & DesignflagshipOthersTerra Consulting Group was acquired in May 2025 by Colliers Engineering & Design and has been fully rebranded to operate under the Colliers Engineering & Design brand. This acquisition strengthens Colliers' national presence and expands capabilities in wireless and infrastructure design services. Terra now operates as a division within Colliers Engineering & Design.

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Black & Veatch: Large infrastructure engineering firm with telecommunications, environmental, and site development capabilities. Competes for many of the same telecom A&E and infrastructure design engagements as Terra.
• Colliers Engineering & Design: The parent platform that acquired Terra in May 2025. Operates a national engineering and design practice across infrastructure, telecom, environmental, and land development — directly comparable because Terra's three service pillars are now fully integrated into this franchise.
• Burns & McDonnell: Full-service engineering, architecture, and consulting firm with significant telecom infrastructure and environmental practices, serving many of the same wireless and infrastructure clients as Terra.
• WSP: Global professional services firm with major U.S. engineering, environmental, and land development practices. Comparable as a broad incumbent competing for the same wireless, infrastructure, and land development mandates.
• Kimley-Horn: Large national planning, engineering, and design consulting firm with established telecom, land development, and site/civil practices — competes for the same wireless carrier and real estate developer engagements as Terra.

Direct peers

• EFI Global (Engineering & Fire Investigations): Engineering, environmental, and consulting services firm serving wireless carriers, infrastructure owners, and developers. Comparable on the engineering-design-plus-environmental overlap with Terra's service mix.
• Centerline Solutions: Specializes in wireless network design, site acquisition, and A&E services for telecommunications carriers. Comparable to Terra's telecom architectural and engineering design offering and shared wireless carrier customer base.
• Congruex: End-to-end wireless infrastructure services provider including engineering, site acquisition, and design for telecom networks. Directly comparable to Terra's combined telecom A&E and site acquisition business.
• Tectonic Engineering Consultants: Engineering and consulting firm focused on wireless telecommunications infrastructure, site acquisition, and A&E design services for carriers and tower owners — the closest direct peer to Terra's telecom A&E and site acquisition service lines.

Emerging players

• TRC Companies: Engineering, environmental, and infrastructure consulting firm with growing wireless and telecom practice areas. Comparable as a multi-disciplinary engineering and environmental services peer serving similar infrastructure end-markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

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 Terra Consulting Group