Sonja is the owner of Demco Fitness.  She works with a wide range of clients. From young athletes, to general population, to yogis, to cyclists, to athletes with sport specific goals, to her mother. Sonja helps members meet their goals, along with teaching them the tools to live a healthy and happy lifestyle.  

Every single person is different. From different goals, to different bodies, to different abilities. Training programs are catered to individual needs for each member. No matter who you are, what injuries you may have, or the goals you want to reach, Sonja has the knowledge, expertise and principles to apply to you.



Mia holds a Masters of Science degree in Clinical Nutrition. She loves working with people in all phases of their wellness journey and believes nutrition is essential for supporting an athlete's general health and performance goals. Mia was drawn to nutrition through her own athletic pursuits. In college she competed on the University of Portland’s varsity NCAA Division 1 rowing team. After her collegiate rowing career she began racing road marathons, ultra marathons and Ironman 70.3. As an endurance athlete, Mia understands the importance of strength training and its role in decreasing one's risk of injury. With her background in nutrition and experience as an endurance athlete, Mia brings a unique perspective to coaching.


Brendan grew up in Texas playing every sport his school offered. He chose to pursue hockey and played in high school and college. He still enjoys playing hockey, soccer, and softball, and thinks playing in the Seattle mist is way better than the Texas heat.  He's always looking for more opportunities for a good pick up game. While in law school, Brendan was the president of the Health and Wellness Association, which promoted healthy mental and physical fitness on campus. 


Brendan has a passion for encouraging people to set motivating goals, helping them reach those goals, and working to improve their overall health as a part of the process. He loves assisting people as they prove to themselves all they are capable of achieving. Brendan is excited to be a part of this team as it works together with support and encouragement to help everyone meet their goals. 


Kathryn is passionate about health and fitness, a collegiate swimmer with a background in physical therapy, and a myriad of certifications.  She strives to make life all about movement and living in a healthy, holistic way.  By using various tools, she helps people get stronger and move pain-free while keeping them safe and having fun.  Kathryn is constantly seeking to break through her own comfort zone while also guiding others to break through theirs.  Life is lived when one is challenged outside what one initially thought possible.  She enjoys sharing her passion with others!