General information for On Site Systems Inc
Physical address
8780 Big Bend Blvd, Ste D, Saint Louis, Mo, 63119
Mailing address
8780 Big Bend Blvd, Suite D, Saint Louis, MO, 63119
Website
hpassist.com
Points of contact for On Site Systems Inc
SAM.gov Points of Contact
Mike
DaPrato
Government Business POC
Sales
8780 Big Bend Blvd, Suite D, st louis, MO, 63119
MICHAEL
DaPRATO
Alternate Government Business POC
8780 big bend blvd, SUITE D, SAINT LOUIS, MO, 63119
SHARON
WHITELEY
Electronic Business POC
Alternate Electronic Business POC
Director of Operations
8780 Big Bend Blvd, Suite D, st louis, MO, 63119
Additional contact details may be available
NAICS codes for On Site Systems Inc
Update history
1 change(s) tracked
Jul 17, 2026
NAICS 513210 is no longer the primary code
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