Diana S. Parks

Diana S. Parks




Diana is Co-Chair of Dorsey’s Public-Private Partnerships Industry Group. She has extensive experience advising both private and public clients in all aspects of complex infrastructure procurements and project execution, including strategic and innovative teaming approaches.

Diana has led projects for large design-build teams and interacted as the lead construction representative to consortiums on the strategic aspects of P3 and design-build pursuits, including negotiation of the RFP, drop-down agreements, sub-contracts, teaming agreements and other ancillary documents.

Diana has represented and worked with public agencies across North America for the last 18 years in developing P3 programs and delivering marquee projects through innovative procurement methodology.

Through her representation of both public and private clients in this industry, Diana has the unique ability to provide truly informed and balanced advice on risk transfer and key commercial terms to both public and private clients.

Education & Admissions

University of Missouri - Kansas City Law School (J.D., 1996), Member and Notes Editor, University of Missouri-Kansas Law Review

George Mason University (B.S., 1990)


  • California
  • New Mexico
  • Not admitted in New York



  • English


Diana joined Dorsey from Tutor Perini Corporation in New York where she advised senior management on P3 and design-build projects. Before joining Tutor Perini in 2013, she was Senior Counsel at Bechtel Infrastructure Corporation where she advised senior management on complex, civil infrastructure projects and was a member of the P3 Strategic Task Force. Ms. Parks also spent over 11 years in the Los Angeles office of Nossaman LLP advising public clients in complex, innovative procurements. Through her experience in both sectors, she has the unique ability to deliver truly informed and balanced guidance to industry participants in complex project delivery methods.

  • La Guardia Airport Central Terminal P3 Procurement; Tappan Zee Bridge Design-Build Procurement; Toronto Eglinton Light Rail P3 Procurement; Dulles Phase 2 Design-Build Procurement; Kosciuszko Bridge Design-Build Procurement; and Denver RTD North Metro Line Design-Build Procurement. Lead attorney on behalf of Contractor in negotiating contract and procurement terms during industry review, including teaming agreements with designers and subcontractors. Assisted in proposal strategy and preparation, appropriate contingency allocation and risk evaluation.
  • Georgia Department of Transportation – PPP Program. Advised and assisted client in developing and implementing the Department's public-private partnership program. Lead partner responsible for drafting and negotiating procurement and contract documents for West by Northwest Managed Lane P3 Procurement.
  • North Carolina Turnpike Authority – Mid-Currituck Bridge Project. Advised on the PPP procurement for a proposed 7-mile toll bridge facility to be newly constructed across the Currituck Sound connecting the mainland to the vacation destination of the Outer Banks.
  • Texas Department of Transportation – Comprehensive Development Agreement (CDA) Program. Member of the Nossaman team advising TxDOT on procurement strategies for its state-wide comprehensive development agreement program which includes design-build, PPPs and franchise/concession agreements. Individual projects include:
    • TTC-35 High Priority Corridor Project. Advised on the proposal evaluation process and participated in developing evaluation logistics and selection methodology.
    • SH 45 Southeast Project. Developed procurement and contract documents for this segment of the Central Texas Turnpike System. Lead attorney on the technical documents and technical provisions of the RFP.
    • Statewide Open-Road Toll Collection System Project. Advised and assisted with drafting procurement and contract documents. Lead attorney advising on the evaluation process and administering the CDA, including supplemental project segments.
    • IH 635 Managed Lanes Project. Advised on all aspects of the procurement and contract negotiations of a PPP for the $1+ billion, 25-mile managed lanes project in Dallas.
  • Orange County Transportation Corridor Agencies – San Joaquin and Foothill/Eastern Toll Roads. Assisted these agencies in their relocation of hundreds of utility facilities for development of their toll roads. Responsibilities included strategic planning, negotiating and drafting relocation agreements, analyzing cost liability issues, and addressing contractor claims.
  • Los Angeles County Metropolitan Transportation Authority. Assisted agency with the development of cooperative agreements with local cities and utility owners impacted by the agency's transit projects.

Industries & Practices

  • Construction & Design
  • Development & Infrastructure
  • Indian & Alaska Native
  • Project Development & Finance
  • Public Finance
  • Public-Private Partnerships
  • Real Estate & Land Use
Diana S. Parks