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Sean Ryan, PE

Sean Ryan, PE


Sean Ryan has more than 11 years of civil engineering and construction management experience. Prior to working with CPMI, Sean founded a small construction management firm specializing in earthquake reinforcement for Southern California apartment buildings subject to mandatory seismic retrofit ordinances. He performed feasibility analysis, developed project estimates, compiled and presented bid packages. He developed an innovative business model reducing both liability and project costs.  Sean also spent seven years working for the Los Angeles County Department of Public Works gaining great exposure to many facets of the civil engineering, land development, and construction industry. His responsibilities include document review, analysis, development of CPM scheduling and graphics, and authoring of expert reports to support analyses for construction management, delay claims, and litigation while also assisting with depositions, mediations, and litigation.


University of Southern California, Marshall School of Business – Master of Business Administration

Loyola Marymount University – Bachelor of Science, Civil Engineering


Professional Engineer: California, New York

Professional Affiliations

American Society of Civil Engineers

The Institute of Transportation Engineers (ITE)

Project Highlights

Seawater Intrusion Barriers Project — Project Manager responsible for the operation and maintenance of $1.5 billion system of potable water injection wells, called “seawater barriers”, which protect Los Angeles County’s groundwater supply from ocean water infiltration. Sean’s team successfully reduced chlorination by 0.4% during a significant drought season. Additionally, Sean was responsible for managing the various improvement projects related to the barriers which included managing financial resources, maintaining project schedules and budgets, and presenting to stakeholders.

Land Development Review Project — Completed review and approval on over 25 major land development projects including a 21,000-home development in Newhall Ranch and 18,000-home development in Tejon Ranch. Reviewed and approved hundreds of traffic studies for smaller projects. His duties included the review of all road infrastructure and traffic impact documents, analysis of traffic data, creation of forecasts and models, and development of engineering solutions to mitigate future congestion. Sean’s skills in managing relationships among developers, engineers, politicians, and constituents allowed for efficient handling of often complicated projects.

Forensic Engineering — Investigated construction dispute cases that cover a wide variety of topics including construction defects, earthquake, fire, flood and mold/fungus damage assessments, and construction claims. Investigated personal injury cases, including OSHA, slip/trip and falls, stairway falls, falls from height, mechanical equipment failures, vehicle accidents, and construction site accidents. Relative to these assignments, his duties included inspections of incident sites; development of diagrams, graphics, and animations, research of building codes, industry standards, and customs and practices, reconstruction of vehicle accidents, including calculations and simulations, and development of reports, declarations, and expert opinions in preparation for expert depositions and trials.