Perform quality and timely maintenance & construction services at a fair price


Grow into the premier maintenance & construction company of the greater Seattle area giving its communities the quality service they deserve


After a long, successful career as a Martial Arts instructor, Bill Diaz decided to change professions. He observed a lucrative niche in condominium maintenance in the greater Seattle area and, drawing on construction and mechanical experience from his youth, in 2005 he founded what is now DMC.


A “mom and pop” operation from the start meant the whole family participated. In addition to her day job as a sign language interpreter, Ellen Diaz provided bookkeeping support for the business. From a young age, both Victor and Joshua worked for their dad during school breaks, learning the value of hard work. Bill built a solid foundation for a business and an impressive reputation for quality work.

Since graduating from high school, Victor worked full time alongside his father. In 2012, Bill retired and passed down the family business to Victor. Years of mentorship from his dad taught him the importance of providing quality, timely service, and treating his employees right. Victor continues to build the company to allow more people to receive the maintenance service they deserve and eventually give back to the community that has given him so much. Through hard work and a unique company culture, DMC aims to be the premier maintenance company for the greater Seattle area.


  • Observing safety procedures at all times, while managing risk

  • Treating all customers with respect, especially the difficult ones  

  • Maintaining quality over quantity

  • Taking care of our tools so they will take care of us

  • Having purpose and efficiency in our work

  • Solving the problem, thinking before acting, and taking all possibilities under consideration

  • Striving to be better at all things, on and off the job