Call Now! (302) 234-1966
406 Lantana Drive, Hockessin, DE 19707

About Cornerstone Martial Arts
in Hockessin, DE

Rob Kloss

Owner and Chief Instructor at
Cornerstone Martial Arts in Hockessin
5th Degree Black Belt

Master Rob Kloss started training in Tang Soo Do karate in April of 1984 and became a full-time professional in 1990. He was the senior master at Hockessin’s Korean Martial Arts Institute for 25 years until taking over as owner on July 1st 2016.

His 30+ years of training have earned him master’s ranks with the World Tang Soo Do Association, World Sin Moo Hapkido Federation and Sin Moo Tang Soo Hapkido Federation. He also holds a 4th degree Black Belt in WTF Taekwondo and a Level 7 Instructor certification in Unarmed Combatives with the Scientific Fighting Congress out of Denton, Texas. He has years and years of experience in teaching, training, competing in and promoting the combat arts.

Master Kloss has trained literally thousands of students in his career and has successfully tested and promoted hundreds to black belt through one of the most demanding associations in the Korean Martial Arts world, the World Tang Soo Do Association. He is especially gifted at teaching kids!

George Maybroda

Co-Owner and Chief Instructor at
Cornerstone Martial Arts in Hockessin
4th Degree Black Belt

Master George Maybroda is known for telling his students, “Your life is an Occasion!!! Rise to it!!!” He started his Martial Arts training at the age of 12 at Diamond State Tae Kwon Do in the Coffee Run shopping center in Hockessin D.E.. That school would eventually become the Hockessin location for the Korean Martial Arts Institute years later. Master Maybroda trained under Thomas Murray for 2 years before circumstances cut his training short but that was far from the end of Master Maybroda’s love for the Martial Arts, or the journey he would soon take that would mold and shape his life.

March 15, 1993 a very overweight and out of shape George Maybroda wandered into the school at Coffee Run expecting to find his previous instructor -- instead he found Mr. Rob Kloss, the man who would be responsible for starting him on his life’s journey and purpose to teach and train martial arts professionally.

Maybroda lost the weight and began to get into shape. He started competing and assisting the then Mr. Kloss and Mr. Watters, who later to become Master Robert Kloss and Master Erwin Watters, with teaching class. Master Maybroda realized very quickly that personal high achievement in the martial arts is rewarding and necessary, but equally important and necessary is to show others how Martial Arts can positively change the course and direction of one’s life by giving students purpose, direction and a set of personal standards that students are required to hold themselves accountable to.

Master Maybroda has dedicated his life to being the best possible Martial Artist, Fighter and Teacher that he can be.

Since Master Maybroda started his journey he has achieved many successes such as achieving the ranks of 4th Master Tang Soo Do, 2nd Degree Black Belt in Tae kwon Do and Hapkido, Blue Belt Brazilian Jiu Jitsu, and currently trains and competes in traditional Thai boxing, Muay Thai.

Master Maybroda throughout his tournament career, has won over one hundred trophies for Point Karate and Olympic Style Tae Kwon Do and is a mutli-time Grand Champion. He currently trains and competes in full contact kick boxing at the age of 44, competing in both the USKA and the PRAKB.

He currently owns Maybroda’s Iron Circle Martial Arts in Malvern PA and co-owns 302 Brazilian Jiu Jitsu and with this new Partnership with Master Rob Kloss is a co-owner of Cornerstone Martial Arts dedicated to preserving the traditions of the martial arts and setting the highest standards in Martial Arts Development and Achievement.

Joe Stripling

Muay Thai Coach at
Cornerstone Martial Arts in Hockessin

Coach Joe Stripling has numerous martial arts rankings and a love of coaching. He started training in American Kenpo Karate at age 6 and received his black belt from Pat Caputo of American Karate Studios.

Coach Joe started wrestled in junior high, in high school he was an alternate for the States in his senior year. After high school he started coaching wrestling at Howard High School where he fell in love with coaching and motivating people under one of his mentors Tim Casey (his high school coach). During his years coaching he started training in Brazilian Jiu Jitsu in 2006 and received his purple belt in 2013 under Bill Walters of 302 BJJ Team Balance.

During this time, he used his abilities to start his career in MMA. In his first and only amateur MMA fight in 2006, after only one month of training, he won a unanimous decision. Coach Joe turned professional in August 2007 and that is where he started falling in love with striking arts.

In 2007, he started training muay thai under a few different gyms until he found the Nak Muay gym and Kru Eric Karner in 2011, little did he know...this would change his life!

Kru Eric took Stripling under his wing and taught him the true art of Sityodtong Muay Thai. In Feb of 2015 Coach Joe was promoted to black pradjit from Kru Eric Karner and was allowed to teach his Nak Muay gym team Sityodtong curriculum at his own gym. He started teaching Muay Thai at the school where he trained in Brazilian Jiu Jitsu for a year until it was time to move on and open up Chok Dee Athletics in 2016.

Coach Joe retired from MMA in January 2016 to focus on the gym and train specifically in Muay Thai and is now focused solely on creating a fun, confident and self-defense driven Muay Thai gym and classes.

At Cornerstone Martial Arts we believe in developing strength from within. Through our various classes - Kids Martial Arts, Adult Martial Arts, Fitness Kickboxing, and Adult Self-Defense - you can get super fit, expand your martial arts & self-defense horizons, or find an inspiring outlet for you children after school.

You�ll learn effective, life-saving skills and while making a ton of new friends too!

The culture at Cornerstone Martial Arts is one where family always comes first and everyone is made welcome. Cornerstone is far more than just a martial arts school. It is a community!

Are you or your little one a total beginner? Or nervous to start something really cool but new? That�s ok!

Our students come from all different backgrounds and professions, have widely different fitness levels and define unique goals for why they attend class. From beginners and elite athletes alike; all of our students get an amazing workout, gain lean muscle, and learn techniques to keep you and your family safe.

Expert Instructors Help You Reach YOUR Goals. Controlled, fast-paced, and fun movements in are peppered throughout every class. Our instructors love to motivate students in a positive way and will meet you where your starting level is.

You�ll LOVE our curriculum, stellar class offerings, and the way your new physique will take shape!

Kids & Adults welcome! Some of our adult members are parents of our younger students, teens love to blow off steam with us and gain a positive body image, and kids have an absolute blast in our fitness featured high energy classes.

Youth & Adults Martial Arts are split so you get the most effective workout and learn skills suitable to your age and level.

Develop the heart of a champion with Fitness Kickboxing! Powerful striking, practical defense maneuvers, calorie roasting, heart-pounding cardio circuits help you develop the stuff champs are made of.

In all of our classes - both kids & adults learn how to be bully-proof, how to spot sticky situations so they can walk away before things get bad, and to defend themselves if they need to. Punching, kicking, self-respect, and respect for authority are the focus.

Below are some additional added benefits of our classes.


  • Boost Self-Esteem

  • Build Better Teamwork & Goal Setting Skills

  • Develop Outrageous Core Strength & Hip Mobility

  • Increase Fitness Levels

  • Have Boundless Energy

  • Gain Fit Friends For Life

Students use our classes as a highly effective training tool for personal defense, a stellar boost to weight loss and fitness gains, or even as a stand-alone martial art. We take great pride in making sure you have the most up-to-date, professional grade equipment, and a grime free environment to squash sickness and colds before they spread. That way you can train harder, and longer to meet your goals as quickly as possible!

Grab our super-low web special going on right now. Our classes fill up fast because it�s such a great deal, reserve your spot today!

Get ready to experience the best prices, the most amazing staff, and have the most fun you�ve EVER had getting fit! Read a little about our leadership below. That way you can get a feel for the vibe our experts bring to our stellar curriculum. Looking forward to training with you soon!

How to Get Started

Come join our Hockessin, DE Martial Arts facility! We offer programs in Birthday Parties, Adult Martial Arts, Kids Martial Arts, Kickboxing, and Summer Camp. Choose a program that most interests you and have the opportunity to sign-up right here on our site for one of our awesome web specials. Or feel free to give us a call at (302) 234-1966 if you have any further questions. Cornerstone Martial Arts hopes to speak with you soon!

Get Started!