Top 31 Federal Mine Safety and Health Review Commission Contractors, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Hire One Personnel Services of Washington, D.c. LLC Top NAICS codes 561320 Temporary Help Services	$651,882	16.3%	Rank history: #11 in FY2023; unchanged since FY2020.
2	Lumen Technologies, Inc. 2 awardees, including Lumen Technologies Government Solutions, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 517311 Wired Telecommunications Carriers	$596,671	14.9%	Rank history: #15 in FY2023; up 3 since FY2020.
3	Mohr Services LLC Top NAICS codes 519190 All Other Information Services	$492,000	12.3%	Rank history: #3 in FY2023; up 6 since FY2020.
4	Thomson Reuters (Tax & Accounting) Inc. Through West Publishing Corporation Top NAICS codes 511199 All Other Publishers	$281,162	7.0%	Rank history: #1 in FY2023; up 13 since FY2020.
5	CDW Corporation Through CDW Government LLC Top NAICS codes 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers 453210 Office Supplies and Stationery Stores	$263,537	6.6%	Rank history: not on the FY2023 list; up 5 since FY2020.
6	Networking for Future Inc. Top NAICS codes 561320 Temporary Help Services	$199,000	5.0%	Rank history: not on the FY2023 list; down 2 since FY2020.
7	Tyler Federal, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$197,993	4.9%	Rank history: not on the FY2023 list; down 1 since FY2020.
8	Library Associates, Inc. Through Library Associates of Maryland, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 561320 Temporary Help Services	$175,905	4.4%	Rank history: #18 in FY2023; up 20 since FY2020.
9	Lumen Technologies Government Solutions, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$159,000	4.0%	Rank history: not on the FY2023 list; down 7 since FY2020.
10	Citigroup Inc. Through Citibank, N.A. Top NAICS codes 453210 Office Supplies and Stationery Stores 511120 Periodical Publishers	$158,364	4.0%	Rank history: #19 in FY2023; up 8 since FY2020.
11	It-Cnp Inc. Top NAICS codes 519190 All Other Information Services	$87,301	2.2%	Rank history: #10 in FY2023; up 3 since FY2020.
12	Sheila K Consulting, Inc. Top NAICS codes 813920 Professional Organizations	$84,000	2.1%	Rank history: not on the FY2023 list; new, not ranked in FY2020.
13	Eastern Research Group Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$83,709	2.1%	Rank history: #16 in FY2023; up 8 since FY2020.
14	United Business Machines, Inc. Top NAICS codes 423420 Office Equipment Merchant Wholesalers	$83,443	2.1%	Rank history: #24 in FY2023; up 12 since FY2020.
15	Capital Reporting Company, LLC Top NAICS codes 561492 Court Reporting and Stenotype Services	$65,000	1.6%	Rank history: not on the FY2023 list; down 3 since FY2020.
16	Verizon Communications Inc. 2 awardees, including Cellco Partnership and Verizon Pennsylvania LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$64,121	1.6%	Rank history: #7 in FY2023; up 8 since FY2020.
17	Federal Mediation and Conciliation Service Top NAICS codes 921190 Other General Government Support	$58,000	1.4%	Rank history: not on the FY2023 list; new, not ranked in FY2020.
18	Cadence Group Associates, Inc. Top NAICS codes 561320 Temporary Help Services	$37,450	0.9%	Rank history: not on the FY2023 list; down 5 since FY2020.
19	Kastle Systems LLC Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$31,828	0.8%	Rank history: #14 in FY2023; up 4 since FY2020.
20	Cenero, LLC Top NAICS codes 541511 Custom Computer Programming Services 519190 All Other Information Services	$31,042	0.8%	Rank history: #22 in FY2023; down 4 since FY2020.
21	All State Courier LLC Top NAICS codes 492210 Local Messengers and Local Delivery	$21,813	0.5%	Rank history: not on the FY2023 list; up 14 since FY2020.
22	Jefferson Consulting Group LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$19,692	0.5%	Rank history: not on the FY2023 list; new, not ranked in FY2020.
23	Skillsoft Corporation Through Skillsoft (Us) LLC Top NAICS codes 453210 Office Supplies and Stationery Stores	$19,612	0.5%	Rank history: #20 in FY2023; new, not ranked in FY2020.
24	HP Enterprise Services LLC Through Onsolve LLC Top NAICS codes 541519 Other Computer Related Services	$11,151	0.3%	Rank history: #25 in FY2023; new, not ranked in FY2020.
25	Government of the United States 2 awardees, including GSA Financial and Payroll Service and Publishing Office, US Government Top NAICS codes 541611 Administrative Management and General Management Consulting Services 519190 All Other Information Services	$9,100	0.2%	Rank history: not on the FY2023 list; unchanged since FY2020.
26	Colossal Contracting LLC Top NAICS codes 453210 Office Supplies and Stationery Stores	$7,360	0.2%	Rank history: #12 in FY2023; new, not ranked in FY2020.
27	Cellco Partnership Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$4,232	0.1%	Rank history: not on the FY2023 list; down 8 since FY2020.
28	International Business Machines Corporation Top NAICS codes 453210 Office Supplies and Stationery Stores	$4,000	0.1%	Rank history: not on the FY2023 list; new, not ranked in FY2020.
29	Presidio Government Solutions LLC Through Presidio Networked Solutions, LLC Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$3,756	0.1%	Rank history: #26 in FY2023; new, not ranked in FY2020.
30	Publishing Office, US Government Top NAICS codes 519190 All Other Information Services	$1,250	<0.1%	Rank history: not on the FY2023 list; down 1 since FY2020.
31	Zoom Communications, Inc. Top NAICS codes 453210 Office Supplies and Stationery Stores	$1,057	<0.1%	Rank history: not on the FY2023 list; up 6 since FY2020.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $4 million obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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