Sierra Electrotek LLC

• Plant closing notice effective MAR 8, 2024 · 37 employees · filed FEB 27, 2024 · CL — this notice is why the plant is listed as reported closed

Notices filed with the state under the federal WARN Act, as the state publishes them, collected by the WARN Act notices feed (CC BY 4.0). A notice records what the employer told the state; it is not by itself proof that the plant closed.

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
Astronautics Corporation of America	Oak Creek	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	● ACTIVE	1.6 KM
CTCreation Technologies	Oak Creek	Other Electronic Component Manufacturing 334419	◐ LIKELY ACTIVE	4.4 KM
CICarlisle Interconnect Technologies	Franklin	Other Electronic Component Manufacturing 334419	◐ LIKELY ACTIVE	6.5 KM
Gigaflight Connectivity INC	Greendale	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	● ACTIVE	6.3 KM
AFArctic Flame LLC	Milwaukee	Semiconductor and Related Device Manufacturing 334413	● ACTIVE	8.5 KM

Every listed plant in Milwaukee County

Also at this address

No other federal record shares this street address.

Where this record comes from

6 sources hold this plant, and 10 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in MN-TEMPO, RCRAINFO, TRIS, TSCA, WI-ESR · EPA site type STATIONARY.

• DOL Form 5500 retirement plan filingsOPERATING
  Record 882902464|WI|53154|7745 s 10th st · first seen AUG 2024 · last seen AUG 2024
• State WARN plant-closing and layoff noticesCLOSURE
  first seen MAR 2024 · last seen MAR 2024
• EPA Toxics Release InventoryOPERATING
  first seen DEC 2023 · last seen DEC 2023
• EPA ECHO compliance recordsOPERATING
  first seen SEP 2021 · last seen SEP 2021
• SBA Paycheck Protection Program loan recordsEXISTENCE
  Record WI|oak creek|7745 s 10th st · first seen JAN 2021 · last seen JAN 2021
• EPA Facility Registry ServiceEXISTENCE
  Record 110000417727 · first seen JUN 2016 · last seen JUN 2016

IN MILWAUKEE COUNTY14 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 5 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name

EPA: SIERRA ELECTROTEK LLC · OCT 2026

Street address

EPA: 7745 S 10TH ST · OCT 2026

City

EPA: OAK CREEK · OCT 2026

State

EPA: WI · OCT 2026

County (FIPS code)

EPA: 55079 · OCT 2026

Coordinates

EPA: 42.90456,-87.9272 · OCT 2026

Employees (band)

SBA PPP: 20-99 · JAN 2021

Retirement plan filing (Form 5500)

DOL: 0 active participants, plan year ending 2024-08-15, 1 plan(s) · AUG 2024

PPP loan

SBA PPP: PPP loan x2, approved 2021-01-17, 80 jobs reported · JAN 2021

Hazardous waste generator (RCRA)

EPA ECHO: VSQG · OCT 2026