Leadership Team

Tiffany Zimmerman

Partner & Chief Financial Officer

As CFO of RT&T Enterprises, Tiffany Zimmerman implements and executes annual budgets. Tiffany has oversight of accounting, payroll, human resources, recruiting, and risk management. Tiffany has been involved with RT&T since its inception and became a full-time … Read More

Kris Colin

Vice President, Sales

As Vice President of Sales, Kris Colin is responsible for pursuing, growing, and maintaining RT&T’s customer relationships. In addition, Kris leads our Customer Service and Planning teams. Kris’ tenure with RT&T has encompassed operations and customer areas … Read More

Shane Manternach

Director of Operations

As Director of Operations, Shane Manternach is responsible for overseeing operations for RT&T’s fleet, and works closely with the management team, to develop and implement organizational strategies, policies, and practices. Shane joined the company in the second … Read More


Jeff Zimmerman

Safety Director

Jeff Zimmerman began with RT&T in May of 2006 as an assistant to the regional dispatcher. Within a few months, Zimmerman was promoted to Director of Regional operations. Zimmerman subsequently became responsible for operations of the entire fleet. Today, Zimmerman … Read More

Ashley Bruggenwirth


As Recruiter, Ashley Bruggenwirth is responsible for the recruiting and hiring of new drivers for RT&T’s fleet, as well as overseeing and expanding advertising and process development for Onboarding. Ashley joined the company in January of 2019, bringing a strong … Read More

Andy Miller

Maintenance Director

Andy Miller studied Diesel Technology at Universal Technical Institute in Glendale Heights, IL, graduating in 1995 at the top of his class.  In October of 1995, he began a career in Heavy Truck Repair.  Working for a Freightliner Dealer for 16 years, Andy worked as a … Read More