Psomas

Company facts

Self-certified in SAM.gov

• For Profit Organization
• Subchapter S Corporation

Entity structure

Corporate Entity (Not Tax Exempt)

Other NAICS codes in SAM.gov

• 541310 Architectural Services
• 541320 Landscape Architectural Services
• 541360 Geophysical Surveying and Mapping Services
• 541370 Surveying and Mapping (except Geophysical) Services
• 541620 Environmental Consulting Services

Corporate family

• Corporate Headquarters Parent Psomas · Los Angeles, CA D2CJY3JLPSC5
  • KPG Psomas

SAM.gov registration date

Jul 14, 2023

Physical address

3131 Elliott Ave #400, Seattle, WA 98121, USA

Website

psomas.com

Founded

1946

Employees

251-1K

Estimated annual revenue

$100M-$250M

Industry

1. Industrials
2. Capital Goods
3. Construction & Engineering
4. Civil Engineering

SIC code

87 Engineering & Management Services

Profiles

• LinkedIn
• X
• Crunchbase

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Feb 15, 2026.