About Psomas

Dedicated to balancing the natural and built environment, Psomas provides sustainably engineered solutions to public and private clients worldwide. As a full-service consulting firm, we help our clients create value and deliver complex projects.  


Markets served include transportation, water, site development and energy with the following services offered:

  • Civil engineering
  • Land surveying including 3D laser scanning
  • Site development engineering
  • Transportation and traffic engineering
  • Structural engineering
  • Water and wastewater engineering
  • Environmental planning and resource management 
  • Land planning and urban design
  • Land use entitlements 
  • Construction management
  • GIS consulting
  • Special district financing

Sustainable practices are incorporated into all of our services. From 
designing ISI (Institute for Sustainable Infrastructure) certified projects such as removing pollutants from urban stormwater runoff to site design for LEEDTM-certified projects and our renewable energy practice, Psomas is in the forefront of the sustainable design movement. 


The cornerstone of our business approach is to focus on our clients’ long-term needs and then guide our strategic growth to meet those needs. Our core strength is our multi-disciplined teams of experts—top-notch staff who produce award-winning projects for our clients through innovation, creativity and cutting-edge technical expertise.


Founded in 1946, Psomas provides services from offices throughout California, Arizona, and Utah.

Products & Services

Services offered include: 

  • Civil engineering
  • Land surveying including 3D laser scanning
  • Site development engineering
  • Transportation and traffic engineering
  • Structural engineering
  • Water and wastewater engineering
  • Environmental planning and resource management 
  • Land planning and urban design
  • Land use entitlements 
  • Construction management
  • GIS consulting
  • Special district financing

Primary Company Location
555 S. Flower St.
Los Angeles
CA
US
90071
(213) 223-1400
(213) 223-1444
Employees:
gina.rowe@psomas.com
mrowe@psomas.com
judi.thomson@psomas.com
+ 6 more employees (view all)

Member Employees

  • Gina Rowe

  • Matt Rowe

  • Judi Thomson

  • Amy Day

  • Rose Fistrovic

  • Bob Talafus

  • Mike Crehan

  • David Mateo

  • Jennifer Marks

Company Contact

Gina Rowe
(213) 223-1400
www.psomas.com
(213) 223-1444
555 S. Flower St.
Suite 4300
Los Angeles
CA
US
90071