Our Mission

Our mission is to cultivate a confident and caring community with individuals who believe anything is possible with a plan and the will to work hard. Ethos, Greek: "character,” represents the guiding beliefs and ideals that shape a community, nation, culture or movement. We believe your character shows up at the door first, before your skills and strengths ever do.



Meet the Team


tim Cohen

Tim, co-founder of Ethos, has developed a passion for fitness bigger than himself. He treats his clients like family and uses a little “tough love” to get them working outside their comfort zones every single session. “I believe group fitness is just a vehicle that can lead you to an overall better, healthier life. When the confidence extends beyond the training floor and starts impacting your life, you’ve won.”

From marathon training to breaking down the mechanics of a deep squat, Tim is dedicated to researching the 'why' behind training. He programs every workout to have purpose and be fun! Tim sees your potential the moment you walk in the door and helps you earn it! In his eyes, no goal is ever set too high.

With the desire to move better and reduce distracting pain, he dove headfirst into mobility training. In the city of Chicago, Ethos opens as the first facility to offer FRC’s KINSTRETCH®. This pro-level injury prevention tool complements Ethos’ strength & conditioning program perfectly, making it one robust system.

Outside the gym, you might find him doing neck CARs with a coffee in hand (always). #everydamnday.



  • Certified Strength and Conditioning Specialist (CSCS)
  • Certified Personal Trainer (NASM)
  • Functional Range Conditioning Mobility Specialist (FRCms)
  • Functional Anatomy Seminars 2019 Summit Attendee (FRS)
  • KINSTRETCH® Certified
  • CPR & AED
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victoria baggio

Victoria, co-founder of Ethos, believes achieving total health is a life long project that starts with exceptional movement and the unshakable belief in oneself. She’ll coach you on the first and convince you of the second. Her role as your coach is executed with privilege and responsibility. There’s a distinct difference between just making a client sweat during a session and actually correcting movement issues while delivering measurable results.

Throughout her time in public accounting and IT, she always came back to fitness as a way to improve herself. When training (or life) gets tough, Victoria encourages you to remember 2 things: if you just put one foot in front of the other and do it to the BEST of your ability, you’ve succeeded that day. Period. She believes in honest hard work before getting fancy and often references the phrase: “get really good at the basics and you'll never run out of work" (Somerset).

Come check out her classes and we promise you’ll be all smiles despite the grind! Want to make her day? Speak up, ask questions and bring snacks. Whether your goal is to get your first pull-up, lock in a faster row, or master the deadlift, Vic’s got you.


  • Certified Personal Trainer (NASM)
  • Certified Functional Strength Coach (CFSC)
  • Certified Functional Movement Specialist (FMS L1)
  • Certified Pregnancy & Postpartum Corrective Exercise Specialist - Dr. Duvall (IN PROCESS 2019)
  • CPR & AED
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john wierzbicki

John, founding coach at Ethos, joins the team with over 15 years of combined group and personal training experience. John is extremely dedicated to helping you reach your fitness and nutrition goals. He is a husband, pseudo stay-at-home dad, and owner of his personal training company, One Goal Training. He advocates that “reaching the ultimate level of health & fitness is a journey that requires you to adopt a lifestyle that only few are willing to follow long enough to see change occur.” He completes the majority of his own workouts in a 3’x6’ space in his home storage room, so never express your excuses to John.

Many have referred to John as their “trusted advisor”, a role he strives to keep every day. John’s promise to his community is always to do whatever it takes to further his knowledge base and stay ahead of the curve. Understanding that proper nutrition poses a threat to many of our health goals, he chose to undertake professional nutrition coaching through the industry-leading, Precision Nutrition. You only get what you put in and while there are no shortcuts, finding what nutrition plan works for YOU is the best reward .”

Get ready to master perfect form, listen to old school hip hop and rap, become a supple leopard, and of course get Dad Bod strong!


  • Certified Personal Trainer (NASM)
  • Precision Nutrition Level 1 (PN)
  • Associate Personal Trainer Experience (NASM)
  • Level 1 Kettlebell Lifting (Kettlebell Concepts)
  • Sports First Aid & Coaching Principles (American Sports Education Program)
  • Certified Volleyball Professional (Volleyball Pros)
  • Cap 1 Coach (USA Beach Volleyball)
  • Cap 1 Coach & IMPACT (USA Volleyball)
  • CPR & AED
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Julia Holl

Julia, founding coach at Ethos, comes to the table at 6'1" with competitive athletics under her belt ready to cheer you on!

Julia grew up as a three sport athlete (hockey, lacrosse, and soccer) in Tonka Bay, MN. Encouraged by her parents from day one, she was taught to think nothing of being a girl in traditional boys sports and to dive right in!

Post athletics, the gym became a place to fuel her competitive nature. Saying Julia fell in love with the high-intensity strength training and conditioning work is an understatement. There was only one thing left to do: become a coach. Her creativity and genuine care as a coach produces one of the most fun, supportive environments in this city. Cheering you on is a constant staple in her class.

"My goal is to instill the DRIVE, the HUSTLE, and the BELIEF within each person at Ethos to attack their goals. At the end of the day, why not you?"

Recently, Julia obtained her Mobility Specialist certification after experiencing first-hand the benefits of proper mobility training. Consistent KINSTRETCH® sessions helped to address some lingering sports injuries leaving her with new found range of motion and new strength building capacities.

Fun fact: Julia took 2nd place Worldwide in the 2018 Concept2 SkiErg 1000m sprints! Dare to challenge?


  • Certified Personal Trainer (NASM)
  • Functional Range Conditioning Mobility Specialist (FRCms)
  • CPR & AED

Molly PFeIffer

Molly joins Ethos with a strong athletic background. As a former D1 soccer player, she brings a competitive element to our group training program. Purposeful yet intense strength training is what sets her coaching apart from others.

As the former Assistant Sports Performance Coach at Stanford University, Molly assisted in program implementation for a variety of athletes. Her role in the Strength & Conditioning program was to facilitate season-to-season growth and administer baseline tests. She even got the opportunity to run direct programming for Alex Massialas, Rio 2016 Olympic Silver Medalist Fencer!

Molly's emphasis on form correction and injury prevention in the weight room is, as she says, "such a critical component of training that I'm excited to carry over to Ethos." Navigating her own ACL injuries, she understands the rehabilitation domain, load management and gradual return to function. As Molly says, "move safe, move strong."

Her knowledge extends beyond the strength & conditioning realm and pushes into mobility training. During her internship at NX Level Performance Training in Waukesha, WI, she led clients through mobility drills and muscle activations.

She is currently pursuing her Masters in Sports Administration at Northwestern University and manages a multi-tenant corporate fitness program in the city.


  • B.S. Exercise Science
  • Certified Strength and Conditioning Specialist (CSCS)
  • Basic Cardiac Life Support (BCLS), OSHA, & AED