Our Instructors


Mr. Michael Grothe - #039660
Sam Dan (3rd Degree Black Belt)
Owner and Chief Studio Instructor
Head Instructor
: Black Belt Program - Qi Gong Program - Leadership Program - Teen Program

Mr. Grothe has been practicing Tang Soo Do for over 14 years, has teaching for 13 years and has been a WTSDA certified instructor since 2009. He has also studied Wing Chun, Hapkido, Boxing, Tai Chi and Qi Gong.  In 2014 Mr. Grothe was made chief instructor and owner of MAATSD MN. Outside of the Martial Arts, Mr. Grothe works at a Chinese Immersion school as a Paraprofessional specifically with children on the autism spectrum. 
"Tang Soo Do helped build a character of respect and integrity in me that I would not have had without my training. My teenage years were tough for me and Tang Soo Do and the instructors here helped me though difficult times. I want to provide the same opportunities for others"


Mr. Matthew Cruz - #036672
Sam Dan (3rd Degree Black Belt)

Mr. Cruz has been practicing Tang Soo Do for over 15 years, is a 3rd degree Black Belt and has been teaching martial arts for over ten years. He has a Bachelor’s Degree in Psychology, certified in Alcohol and Drug Counseling, and is pursuing his Master’s Degree in Clinical Counseling  with long term plans of getting his Doctorate in the clinical counseling field.  Mr. Cruz works at UPS as a Package Handler in the Minneapolis Distribution Hub, He is also employed by Minnesota Adult and Teen Challenge as a Recovery Coach with the clients of the long-term and inpatient drug and alcohol treatment program.
"I have the honor and pleasure of being one of the co owners and senior instructors here. At 28 years old, I am living my childhood dream! I love connecting with people of all ages and helping to improve their quality of life through the training in and practice of Tang Soo Do. 


Ms. Chanelle Cruz - #043243
Sam Dan (3rd Degree Black Belt)

Ms. Cruz started training in Tang Soo Do when she was eleven. Thirteen years later she still loves it! She makes time for Tang Soo Do between her work and studies. Ms. Cruz currently attends the University of Minnesota Duluth where she is a graduate student and research assistant in the Civil Engineering program. 
Along with Tang Soo Do Ms. Cruz is also a member of the World Ki Gong Association and has a background in boxing.
"I am passionate about Tang Soo Do. It helped me take control of my health when I was young and is now a great stress reliever for me as a busy adult. I am constantly falling back on the principles that it taught me (like perseverance and consistency) and always encouraged by what I have accomplished as a martial artist. I look forward to many more years of training and teaching."


Dr. David Guptill - #037226
Sam Dan (3rd Degree Black Belt)
Head Instructor -  Adult Program



Ms. Katrina Schifferl - #048818
Cho Dan (1st Degree Black Belt)
Head Instructor - Kidz Program

Ms. Schiferl has been studying Tang Soo Do since 2013, and assistant instructing since 2014, and received her Black Belt in 2016. She works providing residential services for individuals who are deaf with additional disabilities and is working on her Masters in Clinical Psychology. Ms. Schiferl is fluent in ASL, has her Bachelor's in ASL interpreting, and has over two years experience working with those who are deaf and have additional disabilities. Ms. Schiferl strives to bring her experience working with special populations and education to her lesson plans as head instructor for the children's class.
"Through martial arts have become stronger physically and mentally. Tang Soo Do is not just about kicking and punching, but has influenced how I live my life in every way. MAATSD has been like family to me and I consider it a privilege to now be able to help others on their journey."


Mr. Elijah Dahl - #045293
E Dan (2nd Degree Black Belt)
Head Instructor - Youth 1 Program

Mr. Dahl is 18 years old and has been doing tang so do for 12 years. He's currently a senior at centennial high school and is active in wrestling, football and track. Mr. Dahl also has a passion for music, playing both guitar and drums. He's also a special needs side by side at eagle brook church.
"I like Tang Soo Do because it's made me the teacher, student athlete and mentor I am today. I keep doing tang soo do because there's always something to strive for always thing to work on and always new ways of thinking"


Mr. Travis Olson - #029551
Cho Dan (1st Degree Black Belt)

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Mr. Connor Olson - #047743
Cho Dan (1st Degree Back Belt)
Instructor Trainee

Connor Olson has been training in Tang Soo Do for just over 11 years and has the goal of someday earning his Masters belt. Along with his weekly training in Tang Soo Do, Connor plays fall football and spring soccer with weight training in between. He is also a youth soccer Ref for the local park and rec in the area. He maintains an A average in high school and plays the Trumpet in the band. In his spare time he also plays the guitar and loves to spend time 4 wheeling at the family cabin.

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Mr. Riley Budge - #048817
Cho Dan (1st Degree Black Belt)
Instructor Trainee

Riley Budge is 15 years old. He has been doing Tang Soo Do for 11 years. He is currently a student at Centennial High School.
“I like Tang Soo Do because it has literally transformed me into the person I am today, as well as many others around the globe.”