Iron Workers Local 392 is a construction company based out of 2995 Kingshighway, East St Louis, IL, United States.

The International Union of Operating Engineers (IUOE) is a progressive, diversified trade union that primarily represents operating engineers, who work as heavy equipment operators, mechanics, and surveyors in the construction industry, and stationary engineers, who work in operations and maintenance in building and industrial complexes, and in the service industries. IUOE also represents nurses and other health industry workers, a significant number of public employees engaged in a wide variety of occupations, as well as a number of job classifications in the petrochemical industry.

Tower Rock Stone Company Inc is a construction company based out of 250 W Sand Bank Rd, Columbia, Illinois, United States.

The Missouri State Employees'​ Retirement System (MOSERS), established September 1, 1957, is governed by the statutes of the state of Missouri. MOSERS is a statewide public pension fund providing retirement, disability and survivor benefits for approximately 100,000 state employees, retirees, and their families.

Kilian Engineering, Inc specializes in mechanical, electrical, plumbing and fire alarm engineering and design.

Robinson Construction Company is a design-build general contractor providing EPC, design-build, construction management, and general contracting services throughout the entire United States. Robinson Construction completes projects, large and small, for a variety of specialized markets including commercial/institutional, energy, food & beverage, government/public, healthcare, heavy civil/water, industrial & process, manufacturing, marine, and mining industries. Founded in 1946, Robinson is headquartered in Perryville, Missouri with a regional office in Hopkinsville, Kentucky.

Fred Weber, Inc. is a USA mining company that leverages its strengths and expertise in the mining industry to perform heavy-civil infrastructure projects, as well as contract mining and custom rock crushing services. We believe that four essential elements drive any good company: People + Equipment + Resources + Image From an operating perspective, two key service areas primarily define Fred Weber, Inc.: Material Services and Construction Services. Material Services regionally operates eleven (11) modern limestone quarries, three (3) sand facilities and one (1) trap rock (Rhyolite) quarry. Additionally, Fred Weber, Inc. operates nine(9) hot mix asphalt facilities, including two (2) high-capacity portable drum mix plants. As a full-service, self-supplied contractor in the St. Louis area, we are involved in a project from start to finish. We tightly control the process, cutting expenses and improving quality—all saving time and money. We can self-perform 100 percent of the work, making our own material, and enforcing stricter specifications than state requirements through our quality control program. Major projects include: The New I-64 Project, Taum Sauk Upper Reservoir Rebuild Project, Route 364 Project, INDOT I-69 Project and I-270/Dorsett/Marine Project.

Lionmark Construction Companies, LLC is located in St. Louis, Missouri, United States. Our family of companies has been providing construction and material services for infrastructure projects throughout the Midwest since 1932 and continue to be an innovative, dynamic, driving force in the construction industry. We are recognized for excellence in safety, quality, and customer satisfaction thanks to our team's commitment to building and maintaining highways/bridges, manufacturing asphalt, supplying asphalt emulsions/sealers, and producing aggregates for construction.

West Contracting is a customer-oriented company specializing in asphalt paving and concrete construction. We service MoDOT, cities and municipalities, new construction sites, and repairs to existing developments. Our services include Asphalt Paving, Asphalt for New Construction, Asphalt Maintenance, Asphalt Resurfacing, Pothole Patching, Chip Seal Asphalt, Ultra Thin Asphalt (Nova Chip), Asphalt Milling, Highways and Bridges and Site Development. West Contracting provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. In addition to federal law requirements, West Contracting complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. West Contracting expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. Improper interference with the ability of West Contracting’s employees to perform their job duties may result in discipline up to and including discharge.

J.H. Berra Construction Co., Inc. is a construction company based out of 5091 NEW BAUMGARTNER RD, Saint Louis, Missouri, United States.

Highway and bridge construction.

For over 60 years, Callier & Thompson has set the industry standard in St. Louis for transforming houses into elegant homes by offering premier design, personalized service and unparalleled quality.