Contractor profile
S.S. PAPADOPULOS & ASSOCIATES, INC.
Active registrationSmall Business
UEIDFADX5HTRL54
CAGE code036E3
Primary NAICS541620
LocationROCKVILLE, MD, 20852
Federal obligations$15M
Prime awards28
Active awards22
Latest award actionJul 31, 2026
Federal award activity
Public award recordTop federal customers
- Environmental Protection Agency18 awards$8M
- Department of Justice7 awards$4M
- General Services Administration3 awards$3M
NAICS award mix
- 54162021 awards$10M
- 5411997 awards$4M
PSC award mix
- F99918 awards$7M
- R4247 awards$4M
- F1082 awards$3M
- R4991 awards$1M
Contract vehicles
- GS10F0462M1 awards$4M
- 47QRAA22D00374 awards$4M
- 68HE0524A000215 awards$3M
Potential recompetes
- Department of Justice$3M
- Environmental Protection Agency$1M
- Environmental Protection Agency$130,170
- Environmental Protection Agency$298,473
- Environmental Protection Agency$245,623
- Environmental Protection Agency$69,761
- Environmental Protection Agency$218,828
- Environmental Protection Agency$251,611
- Environmental Protection Agency$290,964
- Environmental Protection Agency$194,210
Prime award history
| Award | Agency / office | Category | Value | Dates |
|---|---|---|---|---|
| 47QRAA22D0037EO14042 THIS CONTRACT INCLUDES THE FEDERAL ACQUISITION REGULATION (FAR) CLAUSE 52.223-99 ENSURING ADEQUATE COVID-19 SAFETY PROTOCOLS FOR FEDERAL CONTRACTORS - FEDERAL SUPPLY SCHEDULE CONTRACT | General Services AdministrationGSA/FAS/PSHC/PROF SRVCS SCHED-PSS | NAICS 541620PSC F999 | $0 | Dec 13, 2021 – Not stated |
| 68HE0526F0013GEOS4 CALL ORDER UNDER GEOS4 FOR KURT MANUFACTURING (05X1) SUPERFUND SITE. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $251,611 | Apr 7, 2026 – Sep 8, 2027 |
| 68HE0526F0040BPA CALL ORDER FOR THE (EAST PALESTINE TRAIN DERAILMENT EPTDR) SITE UNDER GEOS4 BPA# 68HE0524A0002. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $194,210 | Apr 20, 2026 – Sep 8, 2027 |
| 68HE0524A0002REGION 5, GROUNDWATER EVALUATION AND OPTIMIZATION SUPPORT (GEOS) PRIMARILY FOR SUPERFUND REMEDIAL PROJECT MANAGERS (RPMS). BASE PERIOD: 09/09/2024 -09/08/2025 OPTION PERIOD 1: 09/09/2025 - 09/08/2026 OPTION PERIOD 2: 09/09/2026 - 09/08/2027 | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $0 | Sep 9, 2024 – Not stated |
| 15JC1V22P00000502EXPERT WITNESS SERVICES | Department of JusticeCIVIL DIVISION | NAICS 541199PSC R424 | $3M | Jul 21, 2022 – Dec 31, 2026 |
| 68HE0526F0006REGION 5, GROUNDWATER EVALUATION AND OPTIMIZATION SUPPORT (GEOS), INITIAL BASE CALL ORDER UNDER GEOS 4 FOR THE PRISTINE INC SUPERFUND SITE SSID 0556. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $290,964 | Dec 18, 2025 – Sep 8, 2027 |
| 68HE0526F0057REGION 5, GROUNDWATER EVALUATION AND OPTIMIZATION SUPPORT (GEOS) PRIMARILY FOR SUPERFUND REMEDIAL PROJECT MANAGERS (RPMS). GEOS4 FOR OTTAWA TOWNSHIP FLAT GLASS (OTFG) SUPERFUND SITE. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $69,761 | May 20, 2026 – Sep 8, 2027 |
| 68HE0525F0002SOUTHEAST ROCKFORD GROUNDWATER CONTAMINATION SUPERFUND SITE SITEWIDE SUPPORT UNDER GEOS4 BPA. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $298,473 | Jun 9, 2025 – Sep 8, 2026 |
| 68HE0525F0089GEOS4 SUPPORT FOR SOUTHEAST ROCKFORD GROUNDWATER CONTAMINATION SUPERFUND SITE SOURCE AREA 9/10; (SSID 05DK). | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $95,433 | Sep 29, 2025 – Sep 9, 2027 |
| 68HE0526F0049REGION 5, GROUNDWATER EVALUATION AND OPTIMIZATION SUPPORT (GEOS) PRIMARILY FOR SUPERFUND REMEDIAL PROJECT MANAGERS (RPMS). CHEMICAL RECOVERY SYSTEMS SUPERFUND SITE. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $179,674 | May 14, 2026 – Sep 9, 2027 |
| 68HE0525F0034GEOS4 CALL ORDER FOR ACME SOLVENT RECLAIMING SUPERFUND SITE IN ROCKFORD ILLINOIS; SITE 0579. | Environmental Protection AgencyREGION 5 CONTRACTING OFFICE | NAICS 541620PSC F999 | $570,878 | Aug 25, 2025 – Sep 8, 2027 |
| 68HE0923F0064RED HILL FUEL STORAGE FACILITY EXPERT ENVIRONMENTAL SUPPORT | Environmental Protection AgencyREGION 9 CONTRACTING OFFICE | NAICS 541620PSC R499 | $1M | Jul 1, 2023 – Jun 30, 2027 |
Award links and obligation totals come from USAspending.gov public records.
Industries and classifications
NAICS 213112Support Activities for Oil and Gas OperationsNAICS 213113Support Activities for Coal MiningNAICS 213114Support Activities for Metal MiningNAICS 213115Support Activities for Nonmetallic Minerals (except Fuels) MiningNAICS 221310Water Supply and Irrigation SystemsNAICS 513210Software PublishersNAICS 541330Engineering ServicesNAICS 541511Custom Computer Programming ServicesNAICS 541620Environmental Consulting ServicesNAICS 541715Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)NAICS 541990All Other Professional, Scientific, and Technical ServicesNAICS 562219Other Nonhazardous Waste Treatment and DisposalNAICS 562910Remediation ServicesNAICS 562998All Other Miscellaneous Waste Management ServicesNAICS 611420Computer Training
Public points of contact
MATTHEW J TONKINGovernment business
SUSAN MURRAY-WOODAlternate government business
MATTHEW J TONKINElectronic business
SUSAN MURRAY-WOODAlternate electronic business
Names and titles are reproduced from the public registration. FedRoster does not guess or enrich personal contact details.