Dr. Killeen is one of the best double board-certified plastic surgeons Beverly Hills has to offer.

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Dr. Killeen is known for stellar patient care and excellent surgical results.

After receiving her medical degree from Loma Linda University School of Medicine in Loma Linda, California, Dr. Killeen completed her residency in plastic surgery at the Oregon Health & Science University Hospital in Portland, OR, where she served as Chief Resident.

While completing her residency in general surgery at the world famous Cedars-Sinai Medical Center in Los Angeles, CA, she was recognized for her outstanding academic achievement in surgery, leadership, and clinical performance.

Dr. Killeen specializes in complex breast revisions, breast reconstruction, and breast & body aesthetic surgery. She has a special passion for non-invasive skin rejuvenation and medical skin care.

She resides in Beverly Hills, CA with her husband, two kids, two dogs, and two show cats.

Dr. Killeen's Medical Team

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Patient Care Consultant

With over 12 years of experience in Plastic Surgery, Cosmetic Surgery, and Management, including a bachelor’s degree in Marketing, Sasha offers vast experience using her background and education to eloquently assist our patients. She understands how meaningful it is to provide our patients with support, guidance and comfort in addition to explaining procedures, answering questions, and personalized attention to detail during such an important journey.

Coordinating is gratifying for her and she enjoys the opportunity to meet our patients from all over the world, and guide them through their surgical transformations. She loves plastic surgery because she feels it is the ultimate expression of art, science and meticulous technique. This passion reflects in her thoughtful and helpful interactions with patients.

Sasha is also a Certified Medical Assistant and Pharmacy Technician. In her free time, she enjoys spending time with her family and two Himalayan Persian cats – Frankie & Fritz, cooking new recipes and spin class.

team jessica lehmann


Medical Assistant

Jessica has been working in medical aesthetics for 11 years, as a medical assistant for eight years, and a medical aesthetician for three years. Originally from Reno, NV, Jessica graduated from Truckee Meadows Community College and the University of Reno, Nevada. Her passion for taking care of others and medical aesthetics has made her a valuable part of the Cassileth Plastic Surgery team.

As Dr. Killeen’s medical assistant, Jessica provides genuine care and comfort to her patients. In her spare time, Jessica loves to run, be outdoors in nature, practice on her yoga mat every morning, cook for therapy, read instead of watch television, and never says no to all-you-can-eat sushi!

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Physician Assistant

Karen has more than 10 years of experience working in the medical industry. She was born and raised in Los Angeles and studied in New York City, completing both her BA and MA program in nursing in the East Coast. Karen is a board-certified physician assistant assisting Dr. Killeen in the operating room and manages patient preoperative appointments.

Karen loves being a part of a large Beverly Hills cosmetic practice and enjoys being part of a close-knit working environment under Dr. Killeen’s team. In her free time, Karen enjoys hiking and yoga.

team dee jenman



Dee has been a nurse for more than 20 years. She graduated from University of Southern California, School of Nursing, with degrees in nursing and public health. She is passionate about patient care and ensuring an excellent and speedy post-surgery experience. You’ll meet Dee during your consult with Dr. Killeen. She has extensive experience in pre- and post-operative patient care, and she will be there to assist you after surgery, making house calls or visiting you at aftercare to ensure you are comfortable and healing quickly.

You’ll enjoy meeting her as she guides you through the recovery process and answers any questions you may have. Dee is quite the adventurous soul. She enjoys scuba diving, skiing, and gardening.