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Attorney Profile

Admitted

Managing
Partner

Moye, O’Brien & Masterson LLP

Mark Masterson

Mark Masterson is the Managing Partner of Moye, O’Brien & Masterson, LLP. He represents large national and international construction-related entities, including general contractors, construction managers, and concessionaires, guiding them through every stage of large, complex construction projects. His expertise spans both public and private sectors, with a focus on major infrastructure and public works projects, including highways, bridges, rail systems, ports, airports, nuclear facilities, and military installations across the United States. He also represents contractors constructing high-end multi-family residential projects.

Recognized for his strategic counsel, Mark advises clients on critical procurement matters, from bid evaluations and protests to contract negotiation. He also provides strategic advice during contract performance regarding changes, claims, and requests for time extension. Mark assists clients with the development and strategy for complex delay and disruption claims, including claims having values in the hundreds of millions of dollars. He is highly skilled in resolving high-stakes construction disputes, having resolved such disputes via trial, arbitration and various alternative dispute resolution processes. Mark also has a proven track record of success in public-private partnerships and design-build projects. His deep industry knowledge and results-driven approach make him a vital asset to the construction sector, ensuring his clients achieve successful outcomes in even the most complex projects and disputes.

Mark’s recent work includes representing clients in the development, pursuit, and determination of a claim exceeding $675 million on a $1.3 billion light rail project in Los Angeles and a $225 million claim on a $500 million power plant in Maryland. He has also recently represented design-builders in developing, pursuing, and resolving claims against design firms for errors and omissions leading to recoveries of tens of millions of dollars. Mark’s current work includes representing a design-builder in developing a more than $250 million delay and disruption claim arising from the design and construction of a landmark infrastructure project, representing contractors in developing complex delay and disruption claims arising from wastewater projects, and in pursuing claims seeking nearly $200 million from a designer and a subcontractor on a design-build project. He also recently completed a more than 45 day arbitration involving delay and extra work claims on an assisted living facility.

Admissions
  • Florida
  • Texas
  • Virginia
  • Middle District of Florida
  • Eastern District of Virginia
  • Eleventh Circuit U.S. Court of Appeals
  • The Supreme Court of the United States
Biography

Mark Masterson is the Managing Partner of Moye, O’Brien & Masterson, LLP. He represents large national and international general contracting firms, construction managers, concessionaires and other construction-related entities in all phases of complex, large construction projects. He advises clients in both public and private construction, with a focus on major infrastructure and public works projects, including highways, bridges, rail systems, ports, airports, nuclear facilities and military installations across the United States. He also represents contractors constructing high-end multi-family residential projects.

Mark renders advice in regard to all phases of a construction project. He advises clients on critical procurement issues, including bid reviews and bid protests; contract negotiation and administration; and issues arising during contract performance, such as changes, claims, and requests for time extension. He assists clients with the development, pricing, and strategy for complex delay and disruption claims, including claims that have sought hundreds of millions of dollars. He has significant experience in resolving high-stakes construction disputes through trial, arbitration, and alternative dispute resolution processes. He also has extensive experience in public-private partnerships and design-build projects.

Mark’s recent work includes the representation of clients in developing and pursuing a $675 million claim on a $1.3 billion light rail project in Los Angeles and a $225 million claim on a $500 million power plant in Maryland. He has also represented design-builders in the preparation, pursuit, and resolution of claims against design firms for errors and omissions, resulting in recoveries of tens of millions of dollars. His current work includes representing a design-builder in developing and pursuing more than $250 million of delay and disruption claims arising from the design and construction of a landmark infrastructure project, representing contractors in developing complex delay and disruption claims on wastewater projects, and representing a design-builder in pursuing more than $200 million dollars in claims against a designer and subcontractor.

Education
  • University of Florida, Levin College of Law, Juris Doctor, 2000
  • University of Florida, Bachelor of Arts, 1998
Professional Associations and Recognitions
  • The Florida Bar
  • Florida Transportation Builders Association
  • American Bar Association, Forum on Construction Law
  • American Bar Association, Section of Litigation
  • Orange County Bar Association
  • Board Certified in Construction Law by the Florida Bar
  • Construction Lawyers Society of America, 2018-2025.
  • Rising Star by Chambers and Partners, 2014-2015; Ranked Lawyer by Chambers and Partners, 2016, 2020-2025.
  • Florida Trend Notable Managing Partners, 2025