We would like to acknowledge our Giving Through Song 2023 sponsors who have committed to making this event possible. Thank you to our Champion Level Sponsor Lakeside Industries, Partner Level Sponsors Mercury Pharmacy Services, Enterprise and The Partners Group. And thank you to our Advocate Level Sponsors Kaiser Permanente and Malsam Tsang Structural Engineering.

Alpha Supported Living Services is a non-profit agency providing supported living and group training home services to adults and children with developmental disabilities in King, Snohomish, and Spokane counties.

Our Mission

The mission of Alpha Supported Living Services is to serve individuals with developmental disabilities by providing residential and community services that maximize each person’s quality of life.

We Are #AlphaStrong

Through this challenging year, Alpha has continued to work hard to serve the client families we work with.  Our staff has continued to go above and beyond for our community and we continue to thank them everyday for their hard work.  Take a look at a few special client and staff stories from this year!



  • Mercury Golf Tournament back after three year hiatus.
    After a three year break, the Mercury Golf Tournament was back in action at the Nile Shrine Golf Course in Mountlake Terrace. Thanks to the many generous sponsors, groups enjoyed a day of golfing and a delicious catered meal. It was great to have this event back in full swing! … Read more
  • This year’s DSP Recognition Week is September 10th-16th.
    The annual tradition of honoring all the hard working Direct Support Professionals who provide such great care to people with intellectual and developmental disabilities is happening September 10th-16th. This is a week to celebrate the remarkable and often unacknowledged work that DSP’s provide. Agencies all over the nation are preparing … Read more
  • Time to Register for Giving Through Song 2023!
    It’s time to register for this year’s Giving Through Song Gala! We are going to be back at Block 41 on October 21st. Join us for an evening of entertainment to celebrate Alpha SLS. Get your seat today!

Living Up To Our Mission

Our dedicated employees, board, donors, families and community partners have stood with us as we reached new heights, created new systems to meet the support needs of those we serve, and expanded to meet the needs of those wishing to receive our services.

Scott Livengood, Chief Executive Officer

We’re Constantly Striving To Do More


Residential Clients Served


Representative Payee Clients


Community Access Clients Served


Direct Service Hours Provided in 2022


Alpha is a very comfortable agency to live with. I’ve lived in Alpha for over 8 years. I’ve met a lot of new friends in the past 8 years.

Anna T., Client

Being out in the community with someone he knows and is a consistent presence in his life makes a world of difference to my son. I have really appreciated the continuity provided by Alpha’s Community Access staff and the fact that my son looks forward to his time with Ramsey.

Maria, Parent