Online Appointment Requests

For convenient scheduling, request an appointment online.

Sean Mackie, PA-C

Sean is a graduate of the University of Washington’s MEDEX 2008 Physician Assistant program. He is from Washington and enjoys making this state home. Sean has been with Proliance Orthopedic Associates since 2016 and primarily works in conjunction with Dr. Fred Huang. His background includes prior Orthopedic clinic and surgical experience focusing on sports medicine and joint replacements, along with 7 years of Family Practice.

Outside his civilian occupation, Sean is also a veteran of 20 years in the US Navy, both active and reserve. He is currently selected for Lieutenant Commander, and is the Battalion Surgeon for Combat Logistics Battalion 23, a Marine reserve unit out of JBLM, Tacoma. He has done two deployments, one in Afghanistan for Operation Enduring Freedom from 2012-2013, and “somewhere in the Middle East” for Operation Inherent Resolve 2015-2016. His most meaningful experience with the military is the humanitarian medical work he’s been able to do both on deployment and in training exercises.

Outside of work and his military requirements, Sean enjoys spending time with his wife and two children. Time is well spent participating in his children’s sports, exercising-focusing on high intensity training, or riding his Harley.

Clinical Focus
General orthopedics
Knee and Shoulder sports medicine
Knee and Hip joint replacements

Hospital Affiliation
Valley Medical Center, Renton

Bachelor of Science, Physician Assistant, University of Washington, 2008.

Professional Affiliations
American Academy of Physician Assistants
Washington Academy of Physician Assistants

Certifications and Licensures
Washington State Physician Assistant License
NCCPA Physician Assistant Board Certification
American Heart Association ACLS Healthcare Provider Certification
American Heart Association BCLS Healthcare Provider Certification (CPR & AED)



4011 Talbot Rd S #300
Renton, WA 98055

Phone: 425.656.5060
Fax: 425.656.5047


27005 168th Pl SE #201
Covington, WA 98042

Phone: 253.630.3660
Fax: 253.631.1591

Maple Valley

24060 SE Kent Kangley Rd,
Maple Valley, WA 98038

Phone: 425.358.7708
Fax: 425.656.5047

Bone and Joint Urgent Care

150 Andover Park W.
Tukwila, WA 98188

Phone: 425.979.BONE

Latest POA News

  • Proliance Bone and Joint Urgent Care

    Proliance Bone and Joint Urgent Care Is OPEN!

    ORTHOPEDIC URGENT CARE OPENS IN TUKWILA  Proliance Bone and Joint Urgent Care is the only orthopedic urgent care in the Puget Sound region.  [TUKWILA, WA, JANUARY 9, 2019] — Proliance Orthopedic Associates, a Division of Proliance Surgeons, is pleased to announce the opening of Proliance Bone and Joint Urgent Care located at 150 Andover Park …

  • Healthy Holiday Meal

    How to Stay Holiday Healthy

    Wondering how to stay healthy this holiday season? Looking for tips on your diet or exercise routine to build healthy habits? The doctors at Proliance Orthopedic Associates can help you learn more about the best practices for your health. We provide a wide variety of orthopedic services for our patients, specializing in joint replacement, sports …

  • Haloman Pro Casual

    Healing Hip Pain: Q&A with Dr. Haloman

    Dr. Haloman serves a large role as POA’s in-house hip preservation specialist, within our knee and hip services, where he treats a variety of ailments through arthroscopic surgery of the hip, shoulder, and knee. After several months practicing at POA, we realized it was time for a check-up with our newest orthopedic surgeon. Catch up with Dr. Haloman …

Dr. Barrett's Blog

  • Know the outcomes of your total joint implant system

    Several factors affect the outcome of joint replacement surgery. Most important is the skill and experience of your surgeon. Next is the patient and his/her motivation. Thirdly, is the implant. There are joint registries around the world which track the performance of various implant systems. For our anterior hip replacements, we primarily use a Pinnacle …

  • Hip and Knee Surgeons’ position paper on use of stem cell therapies for advanced osteoarthritis

    In the June 2019 issue of the Journal of Arthroplasty, the American Association of Hip and Knee surgeons, The Knee Society, and the Hip Society published a position paper on the use of stem cell therapies for advanced arthritis of the knee and hip. They all state that there is no data to justify the …

  • Recovery from Knee Replacement: 2 Perspectives (Part 5)

    I had the opportunity to experience recovery from a TKA through the eyes of a close family member, who I, as a joint replacement surgeon was the primary caregiver. This experience gave me a new appreciation of what our patients experience in the weeks after TKR. I will break this up into segments: pre-op, day of …