David Mason + Associates

DMA is a certified Minority-Owned Business Enterprise (MBE). The firm emphasizes integrity, safety, and technical expertise in every engagement and is committed to creating opportunities to participate in important infrastructure work.

What we do

• Civil and structural engineering for transportation, buildings, and infrastructure
• Surveying, 3D scanning, and related measurement services
• Utilities, transmission and distribution, and power market services
• Field services, sewer cleaning, CCTV inspection, and hydro excavation
• Construction support and related services for complex projects

History and growth (high-level)

• 1989 – DMA founded in St. Louis, Missouri, offering architecture, civil engineering, and surveying.
• 1990s–2000s – Growth in structural engineering, transportation, parks and recreation, municipal, and higher education projects; expansion into the Chicago market.
• Mid-2000s onward – Continued expansion in power and utility markets, aviation, and large civic and institutional work.
• 2010s – Opened additional regional offices (including Philadelphia) and expanded divisions such as electrical substation design, sewer cleaning and inspection, and field services.

Today, DMA operates multiple regional offices with national reach, serving clients from the East Coast to the Midwest and beyond.

Approach and culture

• Client-focused – Long-term relationships built on service, responsiveness, and understanding each project on a personal level.
• Family-first culture – A collaborative, "all oars in the water" mindset where team members work together across disciplines.
• Respect for the profession – Emphasis on the historical significance of engineering and the lasting impact of infrastructure on communities.

For specific project opportunities, contract vehicles, or certification documentation, customers should contact DMA directly through one of the listed offices.

We provide comprehensive engineering and construction-related services, including:

• Civil engineering – design and assessment of site infrastructure, roadways, highways, bridges, utilities, and public spaces.
• Structural engineering – analysis, design, and evaluation of buildings, bridges, stadiums, and other structures.
• Surveying and 3D scanning – land surveying, 3D scanning, and related measurement services to support design and construction.
• Transmission + distribution and utilities – engineering services for electric and gas networks and related utility infrastructure.
• Field services – on-site support for infrastructure projects and utility work.
• Sewer cleaning, CCTV inspection, and hydro excavation – pipeline and sewer inspection and cleaning services.
• Construction support services – technical support to help keep projects on schedule, coordinated, and buildable.

Who we serve

DMA supports a wide range of public- and private-sector clients, including owners and operators of:

• Transportation infrastructure
• Water and wastewater systems
• Utilities and energy infrastructure (including solar energy)
• Healthcare and hospital campuses
• K–12 and higher education institutions
• Parks and public spaces
• Government and municipal facilities
• Housing, industrial, and commercial developments

How we work

• Technical excellence and efficiency – multi-disciplinary teams with industry-specific experience to help keep projects moving efficiently.
• Safety-focused – safety is treated as a top priority in both engineering and construction-related services.
• Technology-enabled – modern tools (including 3D scanning and other technology) combined with hands-on field experience.
• Collaborative communication – emphasis on proactive communication and long-term client relationships.

For project-specific questions, scopes, or proposals, clients should contact the DMA team directly using the contact details in the locations and contact information document.

800 South Vandeventer Avenue St. Louis, Missouri 63110 Phone: 314.534.1030

Chicago

333 S. Desplaines Street, Suite 200 Chicago, Illinois 60661 Phone: 312.884.5100

Philadelphia – Center City

123 S. Broad Street, Suite 1130 Philadelphia, Pennsylvania 19109 Phone: 215.372.3400

Tampa

400 N. Ashley Drive, Suite 1900 Tampa, Florida 33602 Phone: 813.656.2500

Indianapolis

9465 Counselors Row, Suite 200 Indianapolis, Indiana 46240 Phone: 317.220.6400

Cleveland

1468 W. 9th, #100 Cleveland, Ohio 44113 Phone: 216.427.5600

West Stockbridge

38 Main Street West Stockbridge, Massachusetts 01266 Phone: 914.953.4400

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For contact form submissions or other ways to reach the team, visitors can also use the contact options provided on the main website.

Business hours are not specified on the site; callers should contact the relevant office directly to confirm availability or to schedule conversations about upcoming projects.

Lists David as a location. Names United States and David as a service area. Areas beyond these are not published.

DMA is a Minority-Owned Business Enterprise (MBE) and is committed to supporting and promoting diversity in the workplace. Employment decisions are based on merit, qualifications, and demonstrated capabilities. DMA recruits and hires qualified talent regardless of race, color, religion, sex, national origin, age, disability, genetic information, gender identity, sexual orientation, or any other characteristic protected by law.

Workplace culture

• Inclusive, family-oriented environment
• Emphasis on teamwork and an "all oars in the water" mindset
• Focus on professional growth and long-term careers

Available benefits (as described on the site)

Employees at DMA have access to a range of benefits, including:

• Health insurance
• Dental insurance
• Life insurance
• Long-term disability
• Long-term care
• 401(k) option
• Great culture and team environment
• Professional growth opportunities
• Family environment
• Every other Friday off (as a listed benefit)
• Equal opportunity employer practices

Careers information

Current open positions and application instructions are listed on the DMA careers page of the main website. Candidates can review available roles and submit their information there to start a conversation with the firm.

For specific questions about an opening, candidates should use the contact details provided with the posting or reach out via the main contact options on the website.

• Be Real – Be honest, authentic, and empathetic in relationships with clients and colleagues. Say what needs to be said and be open to constructive feedback.
• Rake the Leaves – Tackle challenging work by rolling up our sleeves, assessing the situation, creating a clear plan, gathering the right tools, and getting to work.
• All Oars In – Value everyone's contribution and work together across roles and levels. The firm is at its best when everyone rows in the same direction, from start to finish.

These principles shape how DMA approaches projects, builds teams, and serves clients.

Safety as a priority

Engineering and construction work carries inherent risks. DMA emphasizes safety as a top priority and aims to give clients peace of mind by:

• Maintaining high levels of professional liability and cyber security insurance (as described on the site)
• Following safety protocols and staying aware of potential risks
• Drawing on decades of firm-wide experience in delivering projects safely

Project approach

DMA's approach combines:

• Experience and efficiency – Multi-disciplined teams with industry-specific experience, focused on keeping projects moving forward efficiently.
• Technology and hard work – Leveraging modern technology, including internal IT capabilities and tools such as 3D scanning, while maintaining a strong focus on hands-on problem solving.
• Client understanding – Taking the time to understand the client and project on a personal level, maintaining clear communication throughout the project lifecycle.

For project-specific safety plans, QA/QC procedures, or detailed methodologies, clients should request that information directly from DMA during project discussions or proposal stages.

DMA serves clients in sectors including:

• Transportation and aviation
• Highways, bridges, and transit infrastructure
• International and regional airports

• Water and wastewater
• Water and wastewater treatment and conveyance infrastructure

• Utilities, power, and energy
• Electric and gas transmission and distribution networks
• Power and utility facilities
• Solar energy projects

• Education
• K–12 school districts
• Universities and higher education campuses

• Healthcare and science
• Hospitals and medical campuses
• Science and technology facilities

• Parks, recreation, and public spaces
• Parks and public spaces
• Arts and culture venues
• Sports and entertainment facilities

• Government and municipal
• Local, regional, and other government and municipal clients

• Housing, commercial, and industrial
• Housing developments
• Industrial and commercial facilities

Typical clients

DMA works with public agencies, utilities, institutions, and private owners that need civil and structural engineering, surveying, utilities, field services, or construction support for new projects, renovations, or assessments.

For details on whether DMA is a fit for a specific project or agency, customers should contact one of the regional offices listed in the locations and contact information document.

Ask anyway — the agent will say plainly that it is not published rather than guess.