SUM THEORY INC. (TX)
Registration and award facts
SAM.gov registration as of
- Net obligations since FY2008
- $5.51M
- $5,508,203under this UEI
- FY2026 obligations
- $0†
- Provisional
- Awards and orders
- 9
- with positive net obligations4 IDV vehicles held
- Latest action
- Jun 16, 2026
- SAM.gov registration
- Active
- Registration expiration date Jan 6, 2027
Registration
- Business start date
- Nov 1, 1996 (29 years)
- Location
- Parker, TX
- Website
- sumtheory.com
† FY2026 obligations (provisional; DoD awards signed after Jul 25, 2026 are not yet public).
Contract actions that the Department of Defense both funds and awards are withheld at the source for 90 days, so DoD awards signed after Jul 25, 2026 are not yet public.
Source: SAM.gov entity registration and FPDS contract actions recorded under UEI CQ53Y2FVLFB4. GovChime does not check exclusions.
Performance
Net obligations recorded under this UEI since FY2008. 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
- FY2023: -$59,051 (de-obligation)
- FY2014: $1,100,613
- FY2013: $1,068,557
- FY2012: $738,519
- FY2011: $463,102
- FY2010: -$170,646 (de-obligation)
- FY2009: $935,459
- FY2008: $1,431,649
Total across 8 fiscal years: $5,508,203
Net de-obligation in that fiscal year (obligations withdrawn).
Top awarding agencies
- Department of Defense$4,660,435, 84.6%
- General Services Administration$847,768, 15.4%
Top awarding sub-agencies
- Department of the Army$2,300,136, 41.8%
- Washington Headquarters Services$2,110,119, 38.3%
- Public Buildings Service$847,768, 15.4%
- Department of the Navy$250,180, 4.5%
Top NAICS by obligations
- 541618Other management consulting services$2,992,014, 54.3%
- 541511Custom computer programming services$1,946,283, 35.3%
Top product and service codes by obligations
- R401Support- professional: personal care (non-medical)$2,992,014, 54.3%
- R499Other professional services$1,946,283, 35.3%
- Y199Construct/misc bldgs$250,180, 4.5%
- B507Special studies/analysis- economic$213,730, 3.9%
- Q201General health care services$53,071, 1.0%
Capabilities
NAICS codes
- 541611Administrative Management and General Management Consulting Services(primary)Small
- 541511Custom Computer Programming ServicesSmall
- 541512Computer Systems Design ServicesSmall
- 541513Computer Facilities Management ServicesSmall
- 541519E
- 541618Other Management Consulting ServicesSmall
Show all 8 NAICS codes2 more NAICS codes
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
- DOT Certified DBE
- Black American Owned
Federal Capability Statement
TSI specializes in the following core competencies: • IT Project Management • Logistics Support Services • Custom Application Development • Business Process Reengineering • Network Security Consulting • Facilities Management • Systems Consulting
Capabilities & Services
Contracts
Latest awards and orders
- 47QTCA18D00J3Federal supply schedule (FSS)VehicleGeneral Services AdministrationFederal Acquisition ServiceLatest action
- W91YTZ11P0948Purchase orderDepartment of DefenseWashington Headquarters ServicesLatest action
- GS06F0819ZGovernment-wide acquisition contract (GWAC)VehicleGeneral Services AdministrationFederal Acquisition ServiceLatest action
- W91YTZ11P0746Purchase orderDepartment of DefenseDepartment of the ArmyLatest action
- W56HZV12PL728Purchase orderDepartment of DefenseDepartment of the ArmyLatest action
- W9126G12C0008Definitive contractDepartment of DefenseDepartment of the ArmyLatest action
- W56HZV11PA749PoDepartment of DefenseDepartment of the ArmyLatest action
- GS06F0378ZGovernment-wide acquisition contract (GWAC)VehicleGeneral Services AdministrationFederal Acquisition ServiceLatest action
- N4008310C1010Definitive contractDepartment of DefenseDepartment of the NavyLatest action
- W52H0907F0021DoDepartment of DefenseDepartment of the ArmyLatest action
Contact Info
As of . Source: SAM.gov Points of Contact.
SAM.gov registration for SUM THEORY INC. lists a physical address and a separate mailing address, along with 6 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
101 E PARK BLVD
FL 6
PLANO, TX, 75074
USA
Mailing Address
PO BOX 557
ALLEN, TX, 75013
USA
Government Business Contact
HALISI CAIL
COO
PO BOX 57
ALLEN, TX, 75013
USA
Electronic Business Contact
DENNIS CAIL
CEO
101 E PARK BLVD
STE 600
PLANO, TX, 75013
USA
Past Performance Contact
HALISI CAIL
COO
PO BOX 57
ALLEN, TX, 75013
USA
Government Business Alternate Contact
HALISI CAIL
COO
PO BOX 57
ALLEN, TX, 75013
USA
Electronic Business Alternate Contact
KASEY THOMAS
PEOPLE SERVICES MANAGER
101 E. PARK BLVD
PLANO, TX, 75074
USA
Past Performance Alternate Contact
0001 541519YY N
0000
0001
E&Y
Additional Details
As of . Source: SAM.gov Entity Registration.
SUM THEORY INC. has no active federal suspension or debarment on record in SAM.gov. Current SAM.gov registration expires January 6, 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
Registration Details
Source: SAM.govInitial Registration
Last Update
Registration Activation
Fiscal Year End
Country of Incorporation
Congressional District
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