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Mainstay Supply Co. LLC

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UEIUEI: the 12-character ID the government gives every company registered for federal work. It replaced the DUNS number in April 2022. Glossary EKW2VJE3NLH1· CAGECAGE code: a 5-character code that identifies one company location for federal work. A company with several sites can have several. Glossary 21AX3· New Orleans, LA· Active registration until Sep 23, 2027· mainstaysupplycompany.com (opens in a new tab)

Overview

Registered industries (NAICS)

Registered in 34 industries; primary 541511

  • 332510 Hardware Manufacturing
  • 334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
  • 335139 Electric Lamp Bulb and Other Lighting Equipment Manufacturing
  • 337215 Showcase, Partition, Shelving, and Locker Manufacturing
  • 423450 Medical, Dental, and Hospital Equipment and Supplies Merchant Wholesalers
  • 423610 Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers
  • 423690 Other Electronic Parts and Equipment Merchant Wholesalers
  • 423840 Industrial Supplies Merchant Wholesalers
  • 423860 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers
  • 423990 Other Miscellaneous Durable Goods Merchant Wholesalers
  • 513210 Software Publishers
  • 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
  • 519290 Web Search Portals and All Other Information Services
  • 541330 Engineering Services
  • 541380 Testing Laboratories and Services
  • 541511 Custom Computer Programming Services
  • 541512 Computer Systems Design Services
  • 541519 Other Computer Related Services
  • 541611 Administrative Management and General Management Consulting Services
  • 541613 Marketing Consulting Services
  • 541618 Other Management Consulting Services
  • 541690 Other Scientific and Technical Consulting Services
  • 541720 Research and Development in the Social Sciences and Humanities
  • 541810 Advertising Agencies
  • 541820 Public Relations Agencies
  • 541910 Marketing Research and Public Opinion Polling
  • 541930 Translation and Interpretation Services
  • 541990 All Other Professional, Scientific, and Technical Services
  • 561410 Document Preparation Services
  • 561499 All Other Business Support Services
  • 611420 Computer Training
  • 611430 Professional and Management Development Training
  • 611710 Educational Support Services
  • 711510 Independent Artists, Writers, and Performers

No prime contract or subcontract to this company appears in the federal contract records from FY2001 on.

About

From the company's SBA profile, updated Sep 2026

Mainstay Supply Co LLC is a veteran-led professional services firm delivering custom software engineering, workflow and document automation, data integration, and legacy IT modernization for federal, state, and local agencies. Core work: cloud-native application development, API and systems integration, document intelligence and requirements tooling (automated extraction from solicitations and statements of work, compliance matrix generation), knowledge management and semantic search, and process orchestration. We also provide marketing and strategic communications consulting, market and competitor research, technical writing, and training. Every engagement is senior-led with full code and security review, United States based delivery, and no offshore subcontracting. The principal is a Marine Corps veteran (DD-214) serving in the US Marine Corps Reserve. Mainstay is an SBA-certified Veteran-Owned Small Business (VOSB). Fixed scope, fixed schedule, single point of accountability.