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Terra Consulting Group, LLC

Service Focused. Results Driven.

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About the firm

Founded in 1994, Terra Consulting Group is a professional engineering practice specializing in wireless architecture and engineering design, site acquisition, civil engineering, and infrastructure development. Serving clients across North America from its headquarters in Illinois, the practice delivers turnkey solutions for telecommunications carriers, commercial land developers, sports venues, healthcare facilities, and municipalities. In 2025, it joined Colliers Engineering & Design, expanding its multi-disciplinary capabilities and service offerings.

Established
1994
Team
Midsize
Firm type
Civil Engineering · Structural Engineering · Electrical Engineering · Mechanical Engineering · Architecture & Engineering · Telecom / RF Engineering

Credentials

LEED AP

People

John J. ZimmermannPresident

Thomas A. ZimmermannVice President

Capabilities

Telecommunications Architectural & Engineering Design Services

Service website

Complete wireless architectural and engineering design services, supporting project lifecycles from initial planning to final engineering for macro sites, small cells, and in-building systems.

  • Macro Site Design
  • Small Cell Design
  • Water Tank & Rooftop Design
  • Site Modifications (Antenna, Radio, Generator & Transport)
  • In-Building, DAS & Head End Room Design
  • Structural Mount Analysis
  • Structural Design Services (Rooftop Frames and Tower & Mount Modifications)
  • HVAC Design & Modification
  • Electrical Design & Modification

Site Acquisition, Management & Real Estate Services

Service website

Comprehensive site acquisition and real estate support, covering leasing, zoning, permitting, and due diligence management.

  • Leasing Services
  • Leasing Amendment Services
  • Zoning & Permitting Research
  • Zoning & Permitting Acquisition
  • File Audit & Lease Review
  • Portfolio Management
  • Project & Due Diligence Management for Wireless Clients

Engineering Design and Industrial Architecture

Service website

Multi-disciplinary engineering solutions spanning civil, structural, electrical, and mechanical disciplines for commercial and industrial projects.

  • Civil Engineering
  • Electrical Engineering
  • Mechanical Engineering
  • Structural Engineering
  • EV Charging Station Design & Engineering

Municipal Telecommunications Consulting

Service website

Expert advisory services for municipal clients, specializing in third-party plan reviews, asset management, and wireless consultations.

  • Third-Party Wireless Plan Review (Small Cell Applications and Macro Installations/Modifications)
  • Temporary Wireless Facility Management
  • Civil Infrastructure Plan Reviews
  • Asset Management Assistance
  • Wireless Consultation

Industries

Telecommunications · Land Development · Commercial · Sports & Recreation · Education · Healthcare · Government · Data Centers · Mission Critical Facilities

Projects