FactoryRegistry
Claim a page

The Gem City Engineering CO.

401 Leo St, Dayton, OH 45404

ACTIVELAST SEEN IN FEDERAL DATA OCT 2026 · 2 SOURCES

Operating signal within 12 months from two or more independent sources.

Visit websiteDirectionsGo to companyClaim this pageGet the badge
Homepage of The Gem City Engineering CO.
Their homepage, crawled JUL 2026

What they make

All Other Miscellaneous Manufacturing339999
  • cleanroom assembly
  • mechatronics assembly
  • metal fabrication
  • PCBA
  • powder coating
  • precision machining
  • systems integration
  • defense
  • aerospace
  • medical device
  • robotics

NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026

CAREERS
Careers page — seen SEP 8, 2026

Where it is

39.78279, -84.19096 · CENSUS TIGER
COUNTY
METRO AREA
ON GOOGLE MAPS

Other plants nearby

FacilityCityIndustryStatusDistance
Paradigm Industrial LLCDaytonMachine Shops
332710
ACTIVE4.4 KM
Ameriwater, LLCDaytonAll Other Miscellaneous Manufacturing
339999
ACTIVE5.8 KM
Dayton Armor LLCMoraineAll Other Miscellaneous Manufacturing
339999
ACTIVE8.6 KM
SsupermetTrotwoodPowder Metallurgy Part Manufacturing
332117
UNVERIFIED8.4 KM
Starwin Industries, LLCDaytonAll Other Plastics Product Manufacturing
326199
LIKELY ACTIVE11.1 KM

Every listed plant in Montgomery County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold this plant, and 8 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

  • The company’s own websiteOPERATING
    first seen JUL 2026 · last seen OCT 2026
  • SAM.gov entity registrationOPERATING
    Record XDFDP26VTM68 · first seen NOV 2025 · last seen AUG 2026

IN MONTGOMERY COUNTY8 other plants share this one’s industry (Other Miscellaneous Manufacturing, NAICS 3399); 1 of them has a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name
SAM.gov: THE GEM CITY ENGINEERING CO. · AUG 2026
Street address
SAM.gov: 401 LEO ST · AUG 2026
City
SAM.gov: DAYTON · AUG 2026
State
SAM.gov: OH · AUG 2026
Coordinates
Census geocoder: 39.78279459227,-84.190956743252 · JUL 2026
Website
SAM.gov: https://www.libraindustries.com/ · AUG 2026
CAGE code
SAM.gov: 53147 · AUG 2026
SAM registration expires
SAM.gov: 2026-11-10 · AUG 2026

Report a correction · Request removal