All of our physician assistants are board-certified by the National Commission on Certification of Physician Assistants (NCCPA) which assures that these healthcare providers meet professional standards of knowledge and clinical skills. Our physician assistants work closely with our doctors to coordinate patient care in the hospital assessing injuries, treating fractures and assisting with surgeries.  They also assist the physicians in our offices performing injections and evaluating patients.  Our physician assistants are trusted members of our clinical team at Pittsburgh Bone, Joint & Spine.

Kristin Basciano Siemon, PA-C

A graduate of St. Francis University, Kristin Siemon has been with our practice since 2004. She works closely with Dr. Eric Chamberlin to care for patients with neck and back problems at Jefferson Hospital, UPMC McKeesport, South Hills Surgery and at our Jefferson office.  She is his primary assistant for spinal surgeries.
Kristin lives with her husband and children in Westmoreland County.



Brian S. Fulton, PA-C

Brian Fulton came to PBJS in 2006 after working for two years with another area orthopedic group. Prior to his PA studies at Chatham University, Brian worked as a respiratory therapist. Like all of our physician assistants, he has extensive experience in treatment fractures, sports injuries and assisting with emergency and elective surgeries. He works with all of our physicians, helping mostly in the hospital setting and occasionally in the office.
Brian lives in Pittsburgh’s South Hills.


Erica L. Dobos, PA-C

Erica L. Dobos, PA-CErica Dobos joined Pittsburgh Bone, Joint & Spine in 2015.  She holds a bachelor of arts in biology from Dartmouth College where she played NCAA Division I Women’s Hockey.  She earned her masters degree at the University of Pittsburgh and worked with our group as a student  on a clinical rotation.

Erica is confident in caring for patients independently  and in collaboration with our physicians.  She is dedicated to physical fitness and has competed in Cross Fit at the regional level.

Courtney L. Caligiuri, PA-C

Courtney Caligiuri PA-CThe newest member of our team is Courtney Caligiuri.  She is an alumnus of Duquesne University where she earned her undergraduate degree in health sciences and a masters degree in physician assistant studies.

Courtney worked in orthopaedics at UPMC East prior to joining our group.  She enjoys providing patient-centered care and building relationships with patients and their family members.