Senneca Holdings

Senior Quality Engineer

Senior Manufacturing/Quality Engineer with 5+ years in manufacturing; CAD/SolidWorks, lean, automation, capital projects, root-cause analysis, ERP experience.

Site Service Supervisor/Superintendent

Supervise field installation teams, coordinate subcontractors, ensure safety/quality, manage schedules, travel up to 50%.

Project Manager

3+ years in construction project management or field coordination; experience with general contractors, subcontractors, and installation schedules; data center or equipment installation experience preferred; CAD reading; ERP/CRM experience advantageous.

Production Supervisor

1-3+ years in manufacturing; 1+ year supervisory experience; strong communication, documentation, and teamwork; proficient in MS Office; high school or higher education.

Production Lead

Minimum 6 months experience assembling product lines; strong attendance; ability to lead a team and improve processes.

Manual Machinist

Experience with manual lathes, mills, grinders; read blueprints and GD&T; inspect parts to tight tolerances; 2+ years manual machining; 5–7 years grinding preferred.

Production Associate

Manufacturing experience preferred; ability to read blueprints; use hand tools; detail-oriented; strong teamwork and safety awareness.

Title	Location	Date
Senior Quality Engineer Full Time · 5+ YOE Mankato, Minnesota, United States · Onsite	Mankato, Minnesota, United States Onsite	Mar 31, 2026
Site Service Supervisor/Superintendent Full Time Columbus, Ohio, United States · Onsite	Columbus, Ohio, United States Onsite	Mar 23, 2026
Project Manager Full Time · 3+ YOE Salt Lake City, Utah, United States · Onsite	Salt Lake City, Utah, United States Onsite	Mar 19, 2026
Production Supervisor Full Time · 3+ YOE Cincinnati, Ohio, United States · Onsite	Cincinnati, Ohio, United States Onsite	Mar 12, 2026
Production Lead Full Time · 0.5+ YOE Redmond, Oregon, United States · Onsite	Redmond, Oregon, United States Onsite	Mar 10, 2026
Manual Machinist Full Time · 2+ YOE Mankato, Minnesota, United States · Onsite	Mankato, Minnesota, United States Onsite	Mar 6, 2026
Production Associate Full Time Mankato, Minnesota, United States · Onsite	Mankato, Minnesota, United States Onsite	Mar 3, 2026

Activities	Specialty door manufacturingIndustrial enclosure productionCold storage door fabricationData center containment engineeringEnvironmental separation systems
Headquarters	US
Industries	ManufacturingBuilding Materials
Name	Senneca Holdings
Employees	1,030
Type	Private
Parent Company	Kohlberg & Company
Subsidiaries	Chase DoorsEliasonSubzero EngineeringColdGuardThermosealDoor EngineeringSimplex Isolation SystemsHMF ExpressTMIChemPrufCurtronEnershieldFibRDorRubbairSainoTiger
Tagline	Manufacturer of specialty doors and controlled environment solutions.
Founded	1,932
Website	senneca.com
Latest Funding Round	Private Equity
Latest Funding Year	2,018
Latest Funding Amount	25,100,000
Latest Investors	Kohlberg & Company

Senneca Holdings

About Senneca Holdings