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  • (310) 326-3636
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  • 3400 Lomita Blvd., Suite 306
    Torrance, CA 90505
Ronald F. Rosso, MD

Ronald F. Rosso, M.D.
Plastic Surgeon & Medical Director

Dr. Rosso has nearly 20 years of Plastic Surgery experience. He is Peninsula Plastic Surgery’s Medical Director and Senior Plastic Surgery staff member at
Torrance Memorial Medical Center, Providence Little Company of Mary Medical Center both in Torrance and San Pedro. He trained at Manhattan Eye and Ear in NY for Cosmetic Surgery, and at Wayne State University Hospital in Detroit for Reconstructive Plastic Surgery. He completed a Research Fellowship in Plastic Surgery at the University of Southern California as well as training in General Surgery at Los Angeles County USC Medical Center.

Sean Tretiak - Plastic Surgery team members

Sean Tretiak, M.D.
Chief of Anesthesia

Dr. Tretiak is Sr. Anesthesiology Attending at Torrance Memorial Medical Center with over 20 years of experience. He has four years of college (UC Berkeley), four years of Medical School (George Washington University), four years of Anesthesiology Training at UC San Francisco, and a one-year internship at the John Hopkins Sinai Hospital of Baltimore.

Joy Colman new

Joy Colman, R.N.
Director of Nursing

Joy Colman, R.N., has over 28 years of experience in nursing and possesses a Bachelors of Science in Nursing, PHN, CNOR, and an MBA. Joy is actively involved in maintaining the highest nursing standards set forth by the California Board of Registered Nursing. Her responsibilities include supervising our nursing staff as well as providing nursing care in the operating and recovery rooms. She is also responsible for maintaining the successful accreditation status for our Surgery Center.  She is an expert nurse practice consultant for the Registered Nursing Board.

Erica Mata
Plastic Surgery Office Manager

Erica is Peninsula Plastic Surgery’s Office Manager.  She uses a combination of medical and administrative knowledge to help our office provide the best possible patient care environment.