DDSI

Oil and GasOklahoma, United States51-200 Employees

DDSI, or Downtown Design Services Inc., is an Oklahoma-based firm established in 1999 that serves the oil and gas sector along with related industries such as fiber optics, energy, and municipal utilities. The company provides a range of drafting and design services for mechanical and electrical systems, along with professional land surveying, geospatial work, GIS and mapping, data collection, PSM documentation, and project management. With a focus on delivering high-quality consulting support, DDSI aims to complete projects in a timely and cost-effective manner while upholding integrity and professionalism.

Headquartered in Tulsa, the firm operates in a market that includes utilities, municipalities, and local governments, offering specialized expertise to clients that require precise technical documentation and coordination across multi-disciplinary teams. DDSI emphasizes long-standing experience in its field, including more than two decades of service and a formal presence as a Better Business Bureau Accredited Business and ISNetworld registered contractor, signaling a commitment to standards and reliability.

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