Top 96 Contractors in PSC Z1ND: Maintenance of Sewage and Waste Facilities, FY2024

Name: Top 96 Contractors in PSC Z1ND: Maintenance of Sewage and Waste Facilities, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 55% of FY2024 PSC Z1ND contract dollars

Contract obligations: $17,342,602 Net of deobligations, by contracts coded PSC Z1ND
Contractors: 99 Parent companies with an obligation
Largest contractor: Nikken Sogyo Co., Ltd. $3.35 million, 17.0% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 96 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Nikken Sogyo Co., Ltd. Top agencies Navy (Department of the Navy)	$3,348,073	17.0%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023 and not on the FY2025 list; unchanged since FY2023.
2	L & R Comm & Construction Inc. Top agencies USAF (Department of the Air Force)	$1,920,934	9.8%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023 and not on the FY2025 list; up 1 since FY2023.
3	Seohai Construction Co.,Ltd. Top agencies USAF (Department of the Air Force)	$1,257,349	6.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
4	Al Musairie Trading & Contracting Company -Qatar Top agencies USAF (Department of the Air Force)	$852,000	4.3%	Rank history: #4 in FY2021, #3 in FY2022, #6 in FY2023 and not on the FY2025 list; up 2 since FY2023.
5	Enviremedial Services, Inc. Top agencies Army (Department of the Army)	$842,526	4.3%	Rank history: #2 in FY2021, #2 in FY2022, #8 in FY2023 and #11 in FY2025; up 3 since FY2023.
6	Tatonka Trucking Llc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$649,204	3.3%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2023 and #7 in FY2025; down 2 since FY2023.
7	Schwarz Construction LLC Top agencies Army (Department of the Army)	$612,484	3.1%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and not on the FY2025 list; up 10 since FY2023.
8	Sociedad Espanola De Montajes Industriales SA Top agencies Navy (Department of the Navy)	$557,805	2.8%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
9	Andrews Plumbing Services Inc. Top agencies VA (Department of Veterans Affairs)	$408,674	2.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
10	East Tennessee Pipeline, L.L.C. Top agencies DOI (Department of the Interior)	$402,896	2.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
11	Ben Lujan Towing, Inc. Top agencies USAF (Department of the Air Force)	$374,518	1.9%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023 and #15 in FY2025; unchanged since FY2023.
12	Krätz GMBH Top agencies Army (Department of the Army)	$339,182	1.7%	Rank history: #10 in FY2021, #8 in FY2022, not on the FY2023 list and #19 in FY2025; returned.
13	Bob Drayton Inc. Top agencies USAF (Department of the Air Force)	$321,574	1.6%	Rank history: not on the FY2021 list, #12 in FY2022, #20 in FY2023 and #33 in FY2025; up 7 since FY2023.
14	Innovative Mechanical Contractors LLC Top agencies Navy (Department of the Navy)	$300,545	1.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
15	Acome Construction Inc. Top agencies HHS (Department of Health and Human Services)	$267,885	1.4%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2025; new.
16	Defender Contracting & Construction LLC Top agencies USAF (Department of the Air Force)	$265,644	1.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
17	Tatitlek Corporation Through Port Fidalgo Constructors Inc. Top agencies USAF (Department of the Air Force)	$259,911	1.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
18	Fluid Solutions LLC Top agencies DOS (Department of State)	$231,097	1.2%	Rank history: not on the FY2021 list, #38 in FY2022, #41 in FY2023 and not on the FY2025 list; up 23 since FY2023.
19	Bayside Engineering Construction Inc. Top agencies Navy (Department of the Navy)	$230,178	1.2%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
20	Central Environmental Inc. Top agencies Navy (Department of the Navy)	$228,562	1.2%	Rank history: #1 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
21	IAW Construction, Inc. Top agencies VA (Department of Veterans Affairs)	$209,474	1.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
22	Jacobs Engineering Group Inc. Through Amentum Technology, Inc. Top agencies Navy (Department of the Navy)	$197,853	1.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
23	Etolin Strait Development Group LLC Through Etolin Strait Partners, LLC Top agencies Navy (Department of the Navy)	$195,460	1.0%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
24	Skookum Educational Programs Top agencies Navy (Department of the Navy)	$176,976	0.9%	Rank history: #64 in FY2021, #76 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
25	Republic Services Inc. Through Republic Services of Kentucky, LLC Top agencies DOJ (Department of Justice)	$171,137	0.9%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; new.
26	Invicta Global, LLC Top agencies Navy (Department of the Navy)	$152,450	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
27	Chugach Alaska Corporation Through Chugach Consolidated Solutions, LLC Top agencies Navy (Department of the Navy)	$139,236	0.7%	Rank history: not on the FY2021 list, #28 in FY2022, #29 in FY2023 and #54 in FY2025; up 2 since FY2023.
28	Allied All-City Inc. Top agencies DOI (Department of the Interior)	$125,000	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
29	Clogbusters Underground Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$123,727	0.6%	Rank history: #34 in FY2021, #20 in FY2022, #28 in FY2023 and #35 in FY2025; down 1 since FY2023.
30	Eight Co.,Ltd. Top agencies USAF (Department of the Air Force)	$111,091	0.6%	Rank history: #27 in FY2021, #23 in FY2022, #55 in FY2023 and #48 in FY2025; up 25 since FY2023.
31	DOO Beotok Pancevo Top agencies DOS (Department of State)	$103,542	0.5%	Rank history: #30 in FY2021, #22 in FY2022, #33 in FY2023 and #36 in FY2025; up 2 since FY2023.
32	El Dorado Septic Service, Inc. Top agencies DOI (Department of the Interior)	$86,874	0.4%	Rank history: #23 in FY2021, #19 in FY2022, #92 in FY2023 and #32 in FY2025; up 60 since FY2023.
33	Manguiri Contracting LLC Top agencies Army (Department of the Army)	$85,194	0.4%	Rank history: not on the FY2021–FY2022 lists, #7 in FY2023 and not on the FY2025 list; down 26 since FY2023.
34	4RB Coopers LLC Top agencies USDA (Department of Agriculture)	$75,000	0.4%	Rank history: #44 in FY2021, #24 in FY2022, #35 in FY2023 and #38 in FY2025; up 1 since FY2023.
35	WAC LLC Top agencies USDA (Department of Agriculture)	$70,992	0.4%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and not on the FY2025 list; up 34 since FY2023.
36	General Sewer Service Inc. Top agencies Navy (Department of the Navy)	$67,282	0.3%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and not on the FY2025 list; up 62 since FY2023.
37	T&L Environmental Service, LLC Top agencies DHS (Department of Homeland Security)	$65,800	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
38	Mitsui E&S Holdings Co., Ltd. Through MES Tokki & Engineering Co., Ltd. Top agencies Navy (Department of the Navy)	$62,734	0.3%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
39	Brockwell's Septic & Service Inc. Top agencies DOJ (Department of Justice)	$58,236	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
40	Ajce Corporation Top agencies DOI (Department of the Interior)	$55,560	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
41	Wwss Associates Inc. Top agencies USAF (Department of the Air Force)	$52,502	0.3%	Rank history: #39 in FY2021, #25 in FY2022, #39 in FY2023 and #49 in FY2025; down 2 since FY2023.
42	Arakelian Enterprises, Inc. Top agencies DOJ (Department of Justice)	$51,678	0.3%	Rank history: not on the FY2021 list, #35 in FY2022, #36 in FY2023 and #45 in FY2025; down 6 since FY2023.
43	Richard Schulz Tiefbau GMBH & Co. KG Top agencies Army (Department of the Army)	$51,262	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
44	Estes Bros. Const. Inc. Top agencies DOI (Department of the Interior)	$47,787	0.2%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023 and not on the FY2025 list; down 35 since FY2023.
45	Habitek S.R.L. Top agencies DOS (Department of State)	$41,928	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	Danaher Corporation Through Hach Company Top agencies Navy (Department of the Navy)	$40,946	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
47	KD Bart Federal Services LLC Top agencies DOI (Department of the Interior)	$40,800	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
48	County of San Bernardino 2 awardees, including San Bernardino County Top agencies DOJ (Department of Justice)	$39,749	0.2%	Rank history: not on the FY2021 list, #37 in FY2022, #40 in FY2023 and #53 in FY2025; down 8 since FY2023.
49	Serranos Inc Through Serrano's, Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$39,593	0.2%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and not on the FY2025 list; up 37 since FY2023.
50	Warren Industries Incorporated Top agencies USDA (Department of Agriculture)	$38,625	0.2%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; new.
51	A-1 Sanitation Inc. Top agencies USDA (Department of Agriculture)	$37,650	0.2%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
52	Go Pro Septic, LLC Top agencies USAF (Department of the Air Force)	$37,285	0.2%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2023 and #57 in FY2025; down 6 since FY2023.
53	Sulzer AG Through JWC Environmental Inc. Top agencies DOJ (Department of Justice)	$36,772	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
54	Outbackjack LLC Top agencies USDA (Department of Agriculture)	$35,631	0.2%	Rank history: #65 in FY2021, #56 in FY2022, not on the FY2023 list and #61 in FY2025; returned.
55	Suntiff, LLC Top agencies USDA (Department of Agriculture)	$34,300	0.2%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2025; new.
56	Browns Septic Service Inc. Top agencies USDA (Department of Agriculture)	$31,810	0.2%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2025; new.
57	Pro Kleen Industrial Services Inc. Top agencies USAF (Department of the Air Force)	$31,680	0.2%	Rank history: #53 in FY2021, #42 in FY2022, #37 in FY2023 and #78 in FY2025; down 20 since FY2023.
58	NCH Corporation Top agencies VA (Department of Veterans Affairs)	$31,091	0.2%	Rank history: not on the FY2021 list, #44 in FY2022, #51 in FY2023 and not on the FY2025 list; down 7 since FY2023.
59	JVM Construction Inc. Top agencies Navy (Department of the Navy)	$29,454	0.1%	Rank history: not on the FY2021 list, #40 in FY2022, #54 in FY2023 and not on the FY2025 list; down 5 since FY2023.
60	Waters Septic Tank Service Top agencies DOJ (Department of Justice)	$28,609	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
61	Provizion LLC Top agencies DOI (Department of the Interior)	$27,648	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; new.
62	J&A Wastewater Services, LLC Top agencies DOJ (Department of Justice)	$27,275	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #76 in FY2025; up 19 since FY2023.
63	Ohno Jyuden Doboku Co., Ltd. Top agencies Army (Department of the Army)	$25,526	0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2025; new.
64	Central Oregon Sanitation Services Inc. Top agencies USDA (Department of Agriculture)	$25,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #32 in FY2023 and not on the FY2025 list; down 32 since FY2023.
65	Suck It Septic & Grease LLC Top agencies USDA (Department of Agriculture)	$24,936	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and not on the FY2025 list; up 15 since FY2023.
66	R.e. Pedrotti Company, Inc. Top agencies USDA (Department of Agriculture)	$24,360	0.1%	Rank history: not on the FY2021 list, #63 in FY2022, #56 in FY2023 and #67 in FY2025; down 10 since FY2023.
67	National Services Department LLC Top agencies Army (Department of the Army)	$22,929	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and not on the FY2025 list; down 5 since FY2023.
68	Dewitt Construction Inc Top agencies DOI (Department of the Interior)	$22,400	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
69	LNZ Enterprises LLC Top agencies DHS (Department of Homeland Security)	$22,145	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2025; new.
70	Rocky Mountain Septic Llc. Top agencies USDA (Department of Agriculture)	$21,025	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2025; new.
71	Trusting US LLC Top agencies Army (Department of the Army)	$20,860	0.1%	Rank history: not on the FY2021 list, #51 in FY2022, #61 in FY2023 and not on the FY2025 list; down 10 since FY2023.
72	Mike Haack Excavating, Inc. Top agencies DHS (Department of Homeland Security)	$18,750	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
73	Tucson Tallow Co, Inc. Top agencies DOJ (Department of Justice)	$18,000	0.1%	Rank history: not on the FY2021 list, #64 in FY2022, #66 in FY2023 and #87 in FY2025; down 7 since FY2023.
74	Water Professional Services, LLC Top agencies DOI (Department of the Interior)	$17,401	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
75	Cantrell Septic Services LLC Top agencies DOI (Department of the Interior)	$16,200	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
76	Jdb3 LLC Top agencies USAF (Department of the Air Force)	$16,200	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
77	Trescott Brandon James Top agencies Army (Department of the Army)	$15,810	0.1%	Rank history: #54 in FY2021, #72 in FY2022, #67 in FY2023 and #50 in FY2025; down 10 since FY2023.
78	Aaecon General Contracting LLC Top agencies USDA (Department of Agriculture)	$14,895	0.1%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
79	Progressive Recovery Inc. Top agencies DOI (Department of the Interior)	$14,640	0.1%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and #80 in FY2025; down 26 since FY2023.
80	A&G Septic and Grease LLC Top agencies DOJ (Department of Justice)	$14,400	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
81	City of Leavenworth KS Top agencies VA (Department of Veterans Affairs)	$13,969	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
82	Professional Grade Septic Pumping & Services LLC Top agencies USDA (Department of Agriculture)	$13,146	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023 and not on the FY2025 list; down 25 since FY2023.
83	Jet Inc. Top agencies DOS (Department of State)	$12,610	0.1%	Rank history: #66 in FY2021, not on the FY2022 list, #74 in FY2023 and #84 in FY2025; down 9 since FY2023.
84	Zeco Equipment, LLC Top agencies DOI (Department of the Interior)	$12,000	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Lang'S Septic Service Inc. Top agencies SSA (Social Security Administration)	$11,708	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #82 in FY2025; down 10 since FY2023.
86	American Engineering Corporation Top agencies USAF (Department of the Air Force)	$11,643	0.1%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2025; new.
87	Revel Environmental Manufacturing, Inc. Top agencies DOT (Department of Transportation)	$9,872	0.1%	Rank history: #77 in FY2021, #66 in FY2022, #82 in FY2023 and #85 in FY2025; down 5 since FY2023.
88	FMS Provider LLC Top agencies DHS (Department of Homeland Security)	$9,871	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and not on the FY2025 list; down 10 since FY2023.
89	B & B Concrete Products Inc. Top agencies USDA (Department of Agriculture)	$8,505	<0.1%	Rank history: #78 in FY2021, #68 in FY2022, #84 in FY2023 and #90 in FY2025; down 5 since FY2023.
90	Big Valley Sanitation Inc. Top agencies DOI (Department of the Interior)	$7,212	<0.1%	Rank history: not on the FY2021 list, #54 in FY2022, #58 in FY2023 and #94 in FY2025; down 32 since FY2023.
91	DXP Enterprises, Inc. Top agencies USDA (Department of Agriculture)	$6,289	<0.1%	Rank history: #57 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
92	R & D Watters Septic Service, Inc. Top agencies Army (Department of the Army)	$6,000	<0.1%	Rank history: #86 in FY2021, #78 in FY2022, #91 in FY2023 and #97 in FY2025; down 1 since FY2023.
93	Chappell, Vincent W Top agencies USDA (Department of Agriculture)	$4,875	<0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #99 in FY2025; up 1 since FY2023.
94	Del Mar Environmental & Construction Services Inc. Top agencies Navy (Department of the Navy)	$4,770	<0.1%	Rank history: #90 in FY2021, #30 in FY2022, #14 in FY2023 and not on the FY2025 list; down 80 since FY2023.
95	Advanced Logistic Partners Inc. Top agencies Army (Department of the Army)	$4,545	<0.1%	Rank history: not on the FY2021 list, #6 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
96	US Diversified Contracting Services Inc. Top agencies VA (Department of Veterans Affairs)	$1,863	<0.1%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and not on the FY2025 list; down 36 since FY2023.

Show 71 more

96 of 99 contractors listed here. See the rest on GovTribe.

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 $19.6 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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.

Quick answers

Who were the top 10 PSC Z1ND contractors in FY2024?

1. Nikken Sogyo Co., Ltd. ($3.35M), 2. L & R Comm & Construction Inc. ($1.92M), 3. Seohai Construction Co.,Ltd. ($1.26M), 4. Al Musairie Trading & Contracting Company -Qatar ($852K), 5. Enviremedial Services, Inc. ($843K), 6. Tatonka Trucking Llc. ($649K), 7. Schwarz Construction LLC ($612K), 8. Sociedad Espanola De Montajes Industriales SA ($558K), 9. Andrews Plumbing Services Inc. ($409K), 10. East Tennessee Pipeline, L.L.C. ($403K).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login