Sonaca
Case Number: 14-RC-378297
Date Filed: 01/06/2026
Status: Open
No. of Employees: 53
Location: Saint Charles, MO
Region Assigned: Region 14, Saint Louis, Missouri
Unit Description: Included: All full-time and regular part-time production and maintenance employees, quality inspectors, CMM Operators and programmers who are employed at the 3030 N. Highway 94 and 3600 Mueller, St. Charles, Missouri facilities. Excluded: All office clerical, document control, scheduler/planner employees, professional employees, quality and manufacturing engineers, guards and supervisors as defined by the Act. and all other employees.
Docket Activity
Date 
|
Document | Issued/Filed By |
|---|---|---|
| 01/06/2026 | Signed RC Petition* | Petitioner |
The Docket Activity list does not reflect all actions in this case.
* This document may require redactions before it can be viewed. To obtain a copy, please file a request through our FOIA Branch.
Related Documents
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Allegations
Allegations data is not available.
Participants
| Participant | Address | Phone |
|---|---|---|
| Employer Legal Representative Bierman, Jon Polsinelli P.C. |
7676 Forsyth Blvd. Ste. 800 St. Louis, MO 63105 |
(314)889-7045 |
| Employer Legal Representative Cavanagh, Lyndsay Polsinelli, PC |
150 N Riverside Plaza Ste 3000 Chicago, IL 60606-1599 |
(312)873-3667 |
| Petitioner Union International Association of Machinists and Aerospace Workers, AFL-CIO |
Upper Marlboro, MD 20772 |
(301)967-4750 |
| Employer Employer Sonaca |
St. Charles, MO 63301 |
(636)946-6525 |
| Employer Employer Sonaca |
St. Charles, MO 63301 |
(636)946-6525 |
Related Cases
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