The Family Business
Lenny and Susanne Knese take over leadership from Mike and [...]
New Generation
Mike and Nancy Jersa purchase NSC from John and Joe [...]
Move to O’Fallon
The St. Charles location is moved to O’Fallon, Missouri.
First Acquisition
NSC acquires Independent Plumbing.
Moving on up
NSC headquarters moves for the 2nd time to Duncan Avenue [...]
St. Charles Location
NSC establishes its St. Charles location.
Move to Tower Grove
NSC headquarters is moved to Tower Grove location.
NSC is Founded
National Sales Company (NSC) is founded at its 1st location [...]
Nabbefeld Heating & Cooling
The Nabbefeld brothers founded Nabbefeld Heating and Cooling.
