Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor. Used alone or in combination, our techniques solve a wide range of challenges across the entire construction sector – from industrial, commercial and housing projects to infrastructure construction for dams, tunnels, transportation and water treatment, as well as projects to address environmental challenges. Global strength and local focus are what makes us unique. Our knowledge of local markets and ground conditions means we’re ideally placed to understand and respond to a particular local engineering challenge. Our global knowledge base then allows us to tap into a wealth of experience, and the brightest minds in the industry, to find the optimum solution. With around 10,000 employees and operations across five continents, we have the people, expertise, experience and financial stability to respond quickly, get the job done and see it through safely. By connecting global resources and local knowledge, we can tackle some of the largest and most demanding projects around the world but the everyday work we do is just as important and, in total, we tackle an unrivalled 6,000 projects every year.

In 1924, New Enterprise Stone & Lime Co., Inc. began as a commitment between J. S. Detwiler and his son, Paul I. Detwiler. Over the next two decades, J. S. and Paul acquired several other quarries in addition to blacktop and ready mix concrete plants. In 1949, J. S. included his other sons, Emmert, Dale, and Galen, in the company’s operations. After the company incorporated in 1950, the four brothers expanded and diversified NES&L Co., Inc., adding precast/prestressed concrete plants, concrete pipe plants, and more quarries. During the 1970’s, NES&L Co., Inc. acquired Martin Limestone, Inc. in Blue Ball, Pennsylvania, and Valley Quarries, Inc. in Chambersburg, Pennsylvania. In 2000, the company added Buffalo Crushed Stone, Inc. in Buffalo, New York, to its list of subsidiaries. In 2002, the company acquired Lancaster Stone. Stabler Companies Inc. and certain of its subsidiaries were added in 2007, expanding their services throughout the United States. The commitment that began between father and son continues today in this family-owned corporation guided by fourth- and fifth-generation Detwilers. That commitment comes from company personnel as well, since many of them are third- and fourth-generation employees. The Pennsylvania Department of Community and Economic Development named NES&L Co., Inc. one of the 50 best places to work among companies with 250 or more employees. From one quarry to a myriad of production facilities, quarries, and contracting services, NES&L Co., Inc. continues to strive to be a leader as a building materials supplier and highway contractor.

The State Retirement and Pension System, or SRPS, or "the System", administers death, disability and retirement benefits on behalf of more than 350,000 members. These include active and former State employees, teachers, State police, judges, law enforcement officers, correctional officers and legislators.

William A. Hazel, Inc. is a total site development company with over 50 years of experience, passion and skill. Engaged in all aspects of site development and road construction throughout Northern Virginia. Base out of 4305 Hazel Park Court, Chantilly, VA

BOARD OF TRUSTEE OF THE GLIDE FOUNDATION is a company based out of 330 ELLIS ST 316, San Francisco, California, United States.

Engaging technology and best practices to give our clients an exceptional construction experience… At Barnhill, we are builders at heart. Our company offers commercial building, site infrastructure, transportation and asphalt services throughout the Southeast and is consistently ranked among ENR’s Top Contractors in the US. With more than 70% of our business coming from repeat clients, our success is built on the vision of the man – Robert E. Barnhill, Sr. – whose name we proudly bear. His passion for people and his firm belief in the Golden Rule – treating others as you want to be treated – still drive us today. Values We are firm, flexible and honest and do the right thing, every single time. We empower our leaders in the field to be decision makers. We are easy to work with – a core philosophy that is both intentional and deliberate. One that requires discipline. Grit. All of these qualities, along with our founder’s vision, have helped grow Barnhill into one of the Southeast’s leading contractors. Leadership Today, the company is led by Rob Barnhill who represents the third generation of management. He continues both his grandfather and his father’s vision of the business, leading the company to even greater levels of success. Bob Barnhill continues to direct the company in his role as chairman of the board and chief executive officer. Together, Rob and Bob have a clear vision for the future and the qualities that shaped the company. Community Investment Our mission is to make a positive impact in our communities by supporting organizations and causes that are important to our business, communities and employees. Each year we set aside time and money to make investments that have a positive impact. We care about being good citizens. Giving back to our communities is consistent with our foundation, supports our employees and is good for business. What we get back far exceeds our contributions.

Founders and brothers O.P. and W.T. Crowder started Crowder Construction Company in 1947, laying the foundation for excellence. Through the years, Crowder has built many projects ranging from bridges and highways to dams, power plants, water treatment plants and buildings, but these projects are just a piece of our legacy. Today, Crowder remains a family-owned company under the leadership of Otis and Bill Crowder, sons of O.P. and W.T. Crowder. Headquartered in Charlotte, North Carolina, the company has grown into a multi-division business with more than 1,000 full-time employees in various offices across four states. Crowder Constructors Inc. performs work across the southeastern U.S. under its wholly-owned subsidiaries: Crowder Construction Company and Crowder Industrial Construction LLC.

S.T. Wooten is a trusted partner and family-owned business, working with notable brands across central and eastern North Carolina for 70 years. Specializing in heavy highway, design-build, materials and commercial site work, S.T. Wooten is dedicated to delivering results with high safety levels and ongoing innovation. With more than 1,000 employees, it’s the company’s people who deliver on its promise of results.

Gray & Son was founded in 1908 with a name synonymous with quality in commercial and residential construction. Through the years, we’ve expanded our services, added to our fleet and welcomed new employees, but we’ve never stopped living up to our name. Today, Gray & Son is a leading contractor in the Baltimore metropolitan area for both private and public construction projects. We specialize in asphalt paving, land excavating, utilities, concrete, soil stabilization, sediment control/storm water management and commercial snow removal. Uniquely qualified to manage the entire construction project for our customers, Gray & Son has the resources to provide many types of construction site work and restoration projects, including residential subdivisions, commercial lots, roadways, schools, park construction, health-care facilities, churches, athletic fields, industrial sites, shopping centers and more. We put pride in everything we do at Gray & Son … from owning all of our fleet and reinvesting in our business, to ensuring that all of our employees and work sites are safe, to serving our customers and our community with unsurpassed service.

As one of the largest real estate development, investment and management companies in the Southeast, Childress Klein has developed more than 50 million square feet of commercial real estate and owns assets valued at more than $2 billion. Guided by the highest standards, we recognize that each property and client need is unique. With more than 31 years of dedicated commercial real estate experience, backed by a team of 280 dedicated and experience professionals, we take a hands-on approach to investment, development and management by putting our client’s needs and interests first. Building upon the legacy established by Fred Klein and Don Childress, we are passionate about delivering exceptional customer service, collaborating with our clients and building relationships that last.

McAdams is a full-service civil engineering, land planning, landscape architecture and geomatics firm located in Raleigh, Durham, Winston-Salem and Charlotte, North Carolina and Dallas-Fort Worth, Texas. McAdams has built its reputation throughout the industry over 44 years by delivering unmatched expertise and unwavering commitment to clients in a variety of markets including municipal, education, healthcare, as well as commercial and residential development. The firm is comprised of over 450 professionals that are united in their desire to achieve their clients’ visions through a thoughtful and resourceful process. Ultimately, we seek a partnership with our clients to further the opportunity to create meaningful experiences through inspired design.

A Full Service, Heavy-Highway, Site-Development and Utility Contractor