Meet our Staff

Motorcars International Marietta Staff

Walter Wiesboeck

Owner, Parts Manager, Business Manager

Founded Munich West Inc. in 1976. Expanded to a second location in 1981, Munich West of Smyrna. Due to increased demand expanded service beyond BMW only to include other European and Asian makes. To more appropriately reflect the new makes the name was changed to Motorcars International, Inc. in 1992. Developed “Autowise” a computer based shop management system.

39 years experience in Automotive repair.

Motorcars International Marietta Staff

Tony Mion

Service Manager

ASE Service consultant
ASE Master Tech – Certified in 8 categories.

39 years experience in automotive repair.
With Motorcars since 1992.

Motorcars International Marietta Staff

Ming Chiem


ASE technician certified in Engine repair, Suspension & Steering, Brakes, Electronics, Heating and Air conditioning.

22 years experience in automotive repair.
With Motorcars since 1993.

*Ming celebrated his 20th year with Motorcars on 10/13/13. Thanks for 2 decades of great work!

Motorcars International Marietta Staff

Matthew Mitchell


5 years experience in Automotive repair.
15 years experience in engine repair.

With Motorcars since 2012

Motorcars International Marietta Staff

Maria Wiesboeck

Office, Customer Service

With Motorcars since 2012

Andrew Wilson

ASE certified technician

5 years experience in BMW repair
3.5 years experience in Honda repair
With Motorcars since Nov. 2015


Boo Wiesboeck

In Memoriam

With Motorcars from 2000-2012

Boo retired in the fall of 2012 after years of dedicated and enthusiastic service to Motorcars’ employees and customers. In her retirement she spent her time at home, supervising her mom’s daily domestic activities and sunbathing. She provided on-going training for Toby and Luna, instructing advanced food-begging techniques and the art of the well timed woof.

Boo was an excellent companion and a lady through her years with family and co-workers. On February 5th, 2015, Boo passed gracefully from this life surrounded by her family members. She was fourteen and a half years old, and lived every moment richly. Her legacy to us is a love for rescue dogs (black lab mixes in particular), a joy for dogs in the workplace, and the knowledge that true peace is found in the company of those who love you. We know that she’s just ahead on the wooded trail, looking back over her shoulder, waiting on us to catch up.


Toby Wiesboeck-Valles

Greeter, Food Taster & Security Patrol

With Motorcars since 2012


Luna Wiesboeck-Valles

Greeter, Food Taster & Morale Booster

With Motorcars since 2013