Civil & Earthwork

Oliver Construction Incorporated (OCI) is a full-service general contracting and commercial construction company known for its comprehensive and integrated construction, architectural, and design services.

Oliver Electric Construction, Inc. is a full-service electrical design and construction firm dedicated to the success of our clients. They are a family-oriented company known for their high standard of performance.

Full-service construction management company specializing in delivering high-quality construction services to clients in the commercial and industrial sectors.

OLSEN is passionate about building and committed to delivering exceptional quality and performance. With over $900+ million in completed projects, they transform visions into reality with innovation, precision, and a forward-thinking approach. Their expertise spans Construction Management, General Contracting, and Design-Build, serving industries from critical infrastructure to commercial, healthcare, and higher education.

Olson-Olson Construction, INC builds environments through practical design development and a thoughtful approach to budget savvy construction.

Olsson Industrial Electric is an electrical contractor for heavy industry, offering electrical construction and engineering solutions to public and private sectors. They specialize in diverse industries ranging from pulp and paper to hydroelectric.

O.L. Thompson Construction Co., Inc. is a sitework construction company based in Charleston, SC. They perform turnkey operations in site development, including private, public, government, and commercial development projects.

Full-service electrical contracting firm providing design build and construction services to commercial developers, general contractors, and property owners. Also provide electrical service and maintenance to commercial property owners and management companies.

Olympic Construction Limited has been operating as a General Contractor throughout the Province of Newfoundland and Labrador for the past 40 years. They operate in the commercial, industrial, and institutional sectors.

High-security perimeters are our specialty! We are proud to install and repair intrusion protection barriers, fences, guardrails, and gates for commercial/industrial customers.

A full-service general contracting company with over 40 years of experience delivering high-quality construction, renovation, and remodeling services. They provide customized solutions for large development, commercial, and industrial projects.

Olympus Construction Management is a construction consulting firm that helps guide owners through commercial construction projects. They offer project management services and owner's representation.

OMA Construction is a heavy civil construction contractor known for excellence throughout the Northwest. They focus on quality, ethics, and safety, employing experienced individuals.

Omega & Associates Engineering Ltd. is a Professional Consulting Engineering firm providing structural and civil engineering services in western Canada. They focus on land development, municipal infrastructure, and structural design for various building types.

Omega Construction serves the commercial and industrial construction needs of the Southeastern US, emphasizing innovative design and quality construction.

Provides technical and administrative services from concept through completion for infrastructure and land development projects, including comprehensive studies and system design for hydrology, transportation engineering, and significant engineering and construction management services for water and sanitary sewer projects.

Omega GC is a general contractor specializing in construction services from renovations to ground-up developments. They serve the I-35 corridor, spanning from Waco to the Rio Grande Valley.

Omega Land Surveying, Inc. is a private land surveying business located in San Diego, specializing in all aspects of private land surveying with emphasis in boundary surveys, topographic surveys, and construction staking throughout southern California.

Omega Waterproofing provides business owners and general contractors with professional, reliable waterproofing services.

MDBrinn (formerly Omni Building Corporation) is a Denver-based full-service general contractor specializing in high-end commercial construction projects for the hospitality and gathering place markets.

OMNI Commercial, LLC is a general contracting, design-build, and construction management company that works on commercial and industrial projects. They serve industries including healthcare, manufacturing, education, municipal, government, historic, hospitality, restaurant, and retail.

Omni Concepts specializes in operable airwall service, new installation, airwall repair, operable wall replacement, and refurbishment. They collaborate with designers, architects, interior designers, and general contractors.

Omni Contracting Solutions LLC is a construction company that provides turn-key solutions from raw land to concrete.

Omni Energy Partners designs and executes infrastructure improvement projects with a focus on energy efficiency, functionality, and safety, primarily in Illinois and Missouri.

Omni Engineering Inc. is a British Columbia based firm providing engineering services in the municipal, industrial, and port related sectors. They also specialize in precision metal stampings and manufacture of miniature and micro-miniature components.

Omniflow Systems Inc. specializes in custom wastewater solutions, including treatment plants, wet utilities, and lift stations. They offer precision engineering and high-quality construction for reliable infrastructure solutions.

Expert instrumentation, electrical and controls services for a variety of industries throughout the eastern United States.

OmniVueNDT specializes in Non-Destructive Testing (NDT) and Non-Destructive Engineering (NDE) using GPR, offering concrete scanning and utility locating. They provide services throughout the country and abroad (Canada and Mexico) for public, commercial, Industrial and residential projects.

ONE70 Group is a full-service design-build firm specializing in constructing beautiful and enduring structures. They offer design-build, general contracting, and mechanical services.

One Construction Group Inc. is a New York City based general contracting and construction management firm specializing in commercial, residential, and design + build projects.

One Day Installation & Repairs Inc offers general contractor services for government and other businesses. They specialize in electrical, rough carpentry, HVAC, painting and coatings, elevators, and furnishings. They focus on high quality work and great customer service.

ONE ELECTRIC is an electrical contractor servicing greater LA, offering end-to-end turnkey solutions (design-build) for all building electrical & low voltage systems needs.

O'Neill Electric Inc. is an electrical contractor specializing in commercial, industrial, and residential electrical construction. They are licensed, bonded, and insured in MN and WI.

A design-build construction company in the ICI (Industrial, Commercial, and Institutional) sector, focusing on restaurants and hospitality, office, and retail projects.

One Source Building Services is a commercial construction and facility management service company based in the DFW area. They have been involved in construction services for over 30 years. They specialize in providing a professional yet easy going approach.

One Source Construction LLC is a commercial construction company specializing in new construction, additions, and remodeling for various businesses.

One Source Electric is a full-service electrical contractor committed to providing safe, clean workmanship and electrical installation services. They focus on exceptional communication, professionalism, and reliability.

Commercial landscape, irrigation and grounds maintenance contractor serving the Houston metro area. Positioned as a single source to property owners and developers, general contractors and property managers.

OneTwo Stop Portable Sanitation Inc. provides portable washroom rentals focused on the construction industry, and also serves the industrial, commercial and residential sectors.

Commercial general contractor specializing in tenant projects within the Phoenix and Tucson regions. Provides a wide variety of construction and facilities services.

One Way Trigger LLC is a general contractor and service provider specializing in pavement preservation.

One West Construction is a construction company in Utah specializing in charter school, commercial, and industrial construction.

ON EX Limited is a civil construction company based in Grey County, Ontario, providing excavation services to commercial, infrastructure, agricultural, and residential customers. They focus on collaborative delivery methods and utilizing the latest technology.

Onorati Construction Company is a civil construction firm that specializes in road construction, utilities, and site development. They offer services to commercial, industrial, municipal, and governmental clients.

Onshore Companies provides civil and commercial construction, oil field services, site work, construction management, logistics and transportation for projects on the Gulf Coast.

ONSITE is a commercial construction contractor transforming California and beyond. They provide various professional construction services for all project types.

OnSite Construction Management, LLC is a construction management company based in Phoenix, AZ. They focus on prefabricated steel and modular buildings, offering preconstruction, architectural design, and construction management services.

Onsite Electric provides electrical services for commercial and industrial clients, specializing in design/build, troubleshoot & repair, and control and automation wiring.

OnStation is the first-ever digital stationing platform purpose-built for road construction and civil engineering teams. The platform brings together location, design, documentation, and team communication into one easy-to-use app.

To offer turn-key solutions for all asset protection needs, including assessment, planning, and installation. They focus on the planning and implementation of turn-key asset protection systems with various products like K-Rated anti-terrorism bollards and safety barriers.