Gritstone Professional Services, PLLC

Company facts

Self-certified in SAM.gov

• For Profit Organization
• Limited Liability Company
• Black American Owned
• Veteran Owned Business
• Minority Owned Business
• Service Disabled Veteran Owned Business
• Self Certified Small Disadvantaged Business

Entity structure

Corporate Entity (Not Tax Exempt)

Other NAICS codes in SAM.gov

• 541611 Administrative Management and General Management Consulting Services
• 541820 Public Relations Agencies
• 541990 All Other Professional, Scientific, and Technical Services
• 621111 Offices of Physicians (except Mental Health Specialists)

SAM.gov registration date

May 4, 2019

Physical address

Lower Level, 4849 167th St, Oak Forest, IL 60452, USA

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Sep 28, 2026.