NEILSON ASSOCIATES INC (PA)
Registration and award facts
SAM.gov registration as of
- Net obligations since FY2009
- $1.89M
- $1,890,095under this UEI
- FY2026 obligations
- -$210.13K†
- -$210,125Provisional
- Awards and orders
- 27
- with positive net obligations2 IDV vehicles held
- Latest action
- Dec 18, 2025
- SAM.gov registration
- Active
- Registration expiration date Jul 8, 2027
Registration
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Business start date
- Sep 1, 1978 (48 years)
- Location
- Chadds Ford, PA
- State of incorporation
- Pennsylvania
- Purpose of registration
- All Awards
- Website
- neilsonassociates.com
† FY2026 obligations (provisional; DoD awards signed after Jul 29, 2026 are not yet public).
Source: SAM.gov entity registration and FPDS contract actions recorded under UEI G48NYU17TXX7. GovChime does not check exclusions.
Performance
Net obligations recorded under this UEI since FY2009. Top lists show the largest five by share of this vendor's net obligations; the shares do not sum to 100%.
Net obligations by fiscal year of action
- FY2026: -$210,125 (de-obligation) (provisional)
- FY2025: $210,125
- FY2024: -$92,139 (de-obligation)
- FY2023: $197,201
- FY2022: $106,499
- FY2020: $169,917
- FY2019: $339,835
- FY2018: $51,935
Show all 17 yearsEarlier years (FY2009–FY2017)
- FY2017: -$10,543 (de-obligation)
- FY2016: $370,906
- FY2015: $189,047
- FY2014: $78,620
- FY2013: $38,439
- FY2012: $176,251
- FY2011: $70,854
- FY2010: $90,476
- FY2009: $112,797
Total across 17 fiscal years: $1,890,095
Net de-obligation in that fiscal year (obligations withdrawn).
Top awarding agencies
- Department of the Treasury$979,228, 51.8%
- General Services Administration$910,867, 48.2%
Top awarding sub-agencies
- United States Mint$979,228, 51.8%
- Public Buildings Service$910,867, 48.2%
Top NAICS by obligations
- 562910Remediation services$979,228, 51.8%
- 541620Environmental consulting services$666,132, 35.2%
- 541330Engineering services$193,678, 10.2%
- 922160Fire protection$37,832, 2.0%
Top product and service codes by obligations
- F108Environmental systems protection- environmental remediation$689,888, 36.5%
- R499Support- professional: other$379,655, 20.1%
- S299Housekeeping- other$289,340, 15.3%
- F103Environmental systems protection- water quality support$135,046, 7.1%
- C211A/e svcs. (incl landscaping interio$86,576, 4.6%
Capabilities
NAICS codes
- 541620Environmental Consulting Services(primary)Small
- 541350Building Inspection ServicesSmall
- 541690Other Scientific and Technical Consulting ServicesSmall
- 561210Facilities Support ServicesSmall
- 562910Remediation Services
Small: small business for that NAICS, self-certified in SAM.gov registration.
SBA certifications
No certification in the SBA profile data.
Business types self-reported in SAM.gov registration:
- Self Certified Small Disadvantaged Business
- Women-Owned Small Business
- Women-Owned Business
Product and service codes (PSC)
- F115ENVIRONMENTAL SYSTEMS PROTECTION- ENVIRONMENTAL CONSULTING AND LEGAL SUPPORT
Federal Capability Statement
Environmental Assessement (all 3 Phases), Comprehensive Industrial Hygiene, Occupational Safety & Health, Site Assessments, Risk Assessment, Indoor Air Quality Investigations, Asbestos, Lead and other hazard assessments
Capabilities & Services
Contracts
Latest awards and orders
- 2036X522C00002Definitive contractDepartment of the TreasuryUnited States MintLatest action
- TMPH16C0005Definitive contractDepartment of the TreasuryUnited States MintLatest action
- GSP1116NW7082Delivery orderunder an indefinite delivery contract (IDC)General Services AdministrationPublic Buildings ServiceLatest action
- GS11P16NWP7062Purchase orderGeneral Services AdministrationPublic Buildings ServiceLatest action
- GSP1116NW7083Delivery orderunder an indefinite delivery contract (IDC)General Services AdministrationPublic Buildings ServiceLatest action
- GS11P16NWP7056Purchase orderGeneral Services AdministrationPublic Buildings ServiceLatest action
- GS11P16NWP7054Purchase orderGeneral Services AdministrationPublic Buildings ServiceLatest action
- GS11P11YAD0019Indefinite delivery contract (IDC)VehicleGeneral Services AdministrationPublic Buildings ServiceLatest action
- GSP1115YA5123DoGeneral Services AdministrationPublic Buildings ServiceLatest action
- GSP1115YA0066DoGeneral Services AdministrationPublic Buildings ServiceLatest action
Contact Info
As of . Source: SAM.gov Points of Contact.
SAM.gov registration for NEILSON ASSOCIATES INC lists a physical address and a separate mailing address, along with 5 verified points of contact. Past Performance contacts are the recommended outreach channel for due-diligence references; Government Business contacts handle procurement-facing correspondence.
Source: SAM.gov entity registration. Contacts displaying numeric or placeholder names have been filtered (defense-in-depth).
Physical Address
10 NINE GATES ROAD
STE 119
CHADDS FORD, PA, 19317
USA
Mailing Address
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Government Business Contact
Brenda A Neilson Hansen
President
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Electronic Business Contact
Brenda A Neilson Hansen
President
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Past Performance Contact
Brenda A Neilson Hansen
President
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Government Business Alternate Contact
Brenda A Neilson Hansen
President
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Electronic Business Alternate Contact
Brenda A Neilson Hansen
President
4023 Kennett Pike
Suite 119
Wilmington, DE, 19807
USA
Additional Details
As of . Source: SAM.gov Entity Registration.
NEILSON ASSOCIATES INC has no active federal suspension or debarment on record in SAM.gov. Current SAM.gov registration expires July 8, 2027.
Source: SAM.gov entity registration (FAR responses, registration status). Always verify active exclusions against the authoritative record on SAM.gov before contract award.
Compliance & Risk Assessment
Source: SAM.gov FAR responsesSuspension/Debarment Status
SAM.gov registration reports no active exclusion
Public Display
Entity information is publicly displayed
Disaster Relief Registry
Registered for disaster relief contracting
Bonding Information
No bonding information provided
EDI
Not declared in SAM.gov
Business Structure
Source: SAM.govRegistration Details
Source: SAM.govInitial Registration
Last Update
Registration Activation
Fiscal Year End
Country of Incorporation
Congressional District
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