DN Tanks helps keep the world’s most precious resource safe by designing and constructing prestressed concrete liquid storage tanks. Our mission is to provide our clients around the world with the highest quality liquid storage at the best long-term value with an unrivalled customer experience. To do this, we form strong, collaborative relationships that ensure exceptional outcomes. The results are long-term performance, durability, reliability, minimal maintenance requirements, and lowest cost of ownership. With over 90 years of experience, and a deep commitment to helping clients meet the emerging needs of today and tomorrow, DN Tanks is Built for the Future. DN Tanks has 10 regional offices and 3 operations facilities located in Greater Boston, Dallas and San Diego areas.

SAFELY Building America’s Infrastructure Since 1972 Robert W. Pereira founded The Middlesex Corporation (TMC) in 1972. Through his vision, drive, and commitment to Safety, Quality, and Excellence, the organization, now encompassing various companies throughout the United States, is a leader in the heavy civil construction and paving industries. In 2018, The Middlesex Corporation was ranked by ENR as the 211th largest contractor in the country. The Middlesex Corporation is headquartered in Littleton, Massachusetts with regional offices in West Haven, Connecticut and Orlando, Florida. The sustained success is a result of the Leadership and Team Members living the core values of Safety first in everything we do, Quality in all we offer, Integrity in the way we act and do business, Professionalism in how we represent ourselves and the company, Strong Work Ethic that produces positive results, and Commitment to the Success of all Team Members and Stakeholders. Our Goal is to sustain our exemplary Safety record while growing into a diversified “Top 100 ENR Company” and being recognized as “One of the Best Places to Work”.

Founded in 1914 and now in its fourth generation of family ownership and management, the Barletta companies'​ headquarters is in Canton, Massachusetts. Its two construction entities perform different categories of work. Barletta Engineering Corporation constructs water and sewage treatment facilities, gas-fired and renewable energy power plants, green roofs and spaces, and commercial buildings. Barletta Heavy Division, Inc. is focused on work such as airports, roads, highways, bridges and tunnels, public transportation projects, railroad and light rail tracks, landscaping, environmental remediation, sitework and utilities. Barletta companies have a professional staff of 90, and are signatory to Labor Agreements with the Unions representing Laborers, Carpenters and Operating Engineers. Barletta companies have a fleet of over 300 pieces of equipment, and are prequalified by the Massachusetts Highway Department, Department of Conservation and Recreation, the Division of Capital Asset Management, and the Massachusetts Bay Transportation Authority. There are few firms in today's construction industry with the level of experience and longevity that the Barletta companies enjoy. By combining strong project management with the latest technological advances and cutting edge construction methods, the Barletta companies have established a reputation for safely completing projects to specification while meeting time and budget constraints.

Keville Enterprises, Inc. (KEI) is a 150 person multi-disciplined Construction Management & Inspection firm based in Marshfield, Massachusetts, with offices in MA, CT, NY, VA, MD, FL and TX . KEI specializes in providing owner’s representative services on public projects. We are certified as a Woman-owned Business Enterprise (WBE/DBE) by over 30 agencies and authorities. We have provided our services on public projects totaling more than $16 billion in value. We pride ourselves on our commitment to client satisfaction which is engrained throughout all levels of our organization. We have successfully served over 150 different clients, many of whom have requested our services on a repeat basis, which demonstrates our commitment to client satisfaction. KEI is not a design firm with construction inspection as a minor component of a larger engineering practice. We are solely a construction management and inspection firm, with all areas of our business focused on and dedicated to construction management and inspection

SPS New England, Inc. provides heavy construction, bridge repair and maintenance services, and design-build services to municipal and state clients throughout New England. As a leading contractor, SPS New England brings more than 25 years of experience and a reputation of excellence to the industry. A combination of management expertise, a high quality workforce and workmanship, a philosophy of safety first, and delivery of projects on time and on budget are what sets SPS apart from industry peers. SPS New England's Heavy Highway Division is responsible for some of the most prominent and complex projects in the region, including the rehabilitation of the Fall River Government Center over I-195, the Commerce Way Interchange in Woburn, Massachusetts, the I-495 Interchange in Lawrence, Massachusetts, and the Route 128 Canton, Dedham, Westwood, Massachusetts Interchange. The Company's Design-Build Division embraces the initiative to find better, faster and smarter ways to build projects. SPS recently completed several historic and time-sensitive accelerated bridge projects in Massachusetts with an "every day counts"​ philosophy:"​ the Pleasant Street Bridge Project in Grafton and the first-ever heavy lift bridge project on Rt. 2 in Phillipston. SPS New England's core values insist on a relentless pursuit of customer satisfaction, maintaining business integrity, hiring talented people, being committed to our employees, and giving back to the community.

Lynch’s long-standing history, track-record of success, and close-knit company culture speaks for itself: a legacy of superior experience, commitment, and integrity. Since James H. Lynch founded a small asphalt paving company of ten or fifteen “good” men in the 1940’s, Lynch has evolved from a residential asphalt driveway operation to a fully integrated construction company of more than 400 employees in six locations in Rhode Island, Massachusetts, and Connecticut. Lynch serves its customers and contracts with six material manufacturing plants, providing resources to build the region’s complex, large-scale public and private construction projects, including transportation, infrastructure, landfill, site excavation, and utility projects. Lynch prides itself on its people. Our high employee retention rate (tenures of 20 to 30 years are not uncommon) reflects our long-term commitment to develop and grow our workforce, as individuals, professionals, and collaborators. We are team-oriented and value the participation of all employees at all levels. We have a collegial, competitive spirit that brings “can do” problem-solving expertise to every project. We get it done!

Cashman is a privately held multi-disciplinary construction and development company, founded and owned by Jay M. Cashman, the current Chairman of the Board. Cashman offers a comprehensive portfolio of companies and services—spanning half a century—in the Heavy Civil / Marine Construction, Dredging, Renewable Energy, LNG / Concrete Tank Design, Port Facilities / Development, Barge / Equipment Leasing, and Mechanical Construction industries. The Cashman Companies have executed some of the most difficult and complex projects all over the world—from offshore drilling, to the largest remediation dredging project in U.S. history—many of which have earned national recognition for their complexity and engineering significance. Our Company is comprised of industry experts with the passion and ability to solve impossible challenges. We are pioneers, entrepreneurs and visionaries. We are mentors, friends, and family. We are empowered to Think Impossible (TM), share ideas, and reach for the stars. The Cashman culture thrives on innovation, which we believe is the key to our continued success in creating the next generation of modern infrastructure, revitalizing our ports and waterways, restoring and preserving our environment, and providing alternative sources of clean energy. The Cashman Family of Companies: Cashman Dredging & Marine Contracting: www.cashmandredging.com Patriot Renewables: www.patriotrenewables.com Preload International: www.preloadinternational.com Sterling Equipment: www.sterlingequipment.com IPC Lydon: www.ipclydon.net

Continental Paving is a machinery company based out of 1334 Hooksett Rd, Hooksett, New Hampshire, United States.

Founded in 1987, NEL Corporation is a Massachusetts based General Contractor specializing in bridge, site, marine, concrete and facilities construction. Our emphasis is on the rehabilitation and maintenance of existing structures. We have a solid reputation for quality work, safe working conditions and professional management and we honor our commitment to quality workmanship.

Since 1978, P.A. Landers, Inc. has met the construction project needs of contractors, homeowners, individual municipalities, as well as the commonwealth of Massachusetts. Thirty years ago, Preston A. Landers had a vision of a company dedicated to good, quality work at fair prices. What began with just three people, a backhoe and a desire to provide unequaled service is today a diversified construction company and a major supplier of construction materials P.A. Landers, Inc. is one of the largest contractors in the Northeast, capable of handling jobs of all sizes. Thanks to our top notch employees and motivated customers from the corporate giant to the homeowner, we are still a major contributor to the economic and financial growth in our region. From supplying product for massive projects, like Colony Place and Shops at 5, to performing extensive roadway construction, to delivering driveway stone to individual homes, P.A. Landers, Inc. is the right company for the job. We are the top choice, full service provider for all of your construction needs.

The O’Connor Corporation is committed to building long-term relationships with our clients based on performance, integrity, safety, and customer satisfaction. We continue to meet the evolving needs within our industry by employing the most qualified and dedicated project managers, professional millwrights, and boilermakers. Our highly trained team continuously strives to meet or exceed our customers’ expectations. The O'Connor Corporation services the following industries: Power Generation Maintenance and Construction, Water and Wastewater, Moveable Bridges, Material Handling, Pulp & Paper, and Precision Mechanical Alignments.