General Surgery Faculty and Staff

Our surgery faculty come from diverse training programs, bringing a wealth of knowledge and skill sets to teach our residents.

Program director


Cristina Nituica, MD, FACS
Program Director

Medical School: Carol Davila University of Medicine and Pharmaceutics
Residency: Hahnemann University Hospital, Drexel University

Core faculty

Christina Maser
Christina Maser, MD, MHA, FACS
Associate Program Director and Core Faculty

Medical School: Michigan State University College of Human Medicine
Residency: William Beaumont Hospital, Royal Oak
Fellowship: Yale University

A man with dark hair and goatee wears blue suit with white collared shirt and red tie.
Akram Alashari, MD
Clerkship Director
Core Faculty

Medical School: University Faculty of Medicine Cairo, Egypt
Residency: University of Connecticut
Fellowship: University of Florida / Shands Hospital


Omar Marar, MD
Clerkship Director
Core Faculty

Medical School: Royal College of Surgeons Ireland (RCSI)
Residency: St. Barnabas Medical Center
Fellowship: Jefferson Medical College Thomas Jefferson University
John Sharpe

John Sharpe, MD, MS, FACS
Core Faculty

Medical School: Wayne State University School of Medicine
Residency: University of Tennessee Health Science Center
Fellowship: University of Tennessee Health Science Center

Wael Solh
Wael Solh, MD
Core Faculty

Medical School: Tufts University, School of Medicine
Residency: Columbia University, School of Physicians and Surgeons, St. Luke's Roosevelt Hospital
Fellowship: Cleveland Clinic Florida


Samuel Shaheen
Samuel Shaheen, MD, FACS
President and CEO, CMU Medical Education Partners 

Medical School: University of Michigan - Ann Arbor
Residency: McGaw Medical Center and Northwestern Memorial Hospital, Northwestern University


Timothy Hackett, MD

Medical School: University of Toledo Medical Center
Residency: The Jewish Hospital of Cincinnati

Maher Ghanem, MD, FACS

Medical School: Tishreen University
Residency: Damascus University and Central Michigan University
Fellowship: Johns Hopkins Hospital and University of Pittsburgh Medical Center

Chet Morrison
Chet Morrison, MD

Medical School: George Washington University School of Medicine and Health Science
Residency: Fitzsimons Army Medical Center / William Beaumont Army Medical Center
University of Maryland School of Medicine

Yong Yoon
Yong C. Yoon, MD, FACS

Medical School: State University of New York College of Medicine at Brooklyn
Residency: St. Luke's-Roosevelt Hospital Center
Fellowship: St. Luke's Roosevelt Hospital Center 

Nurse practitioners and physician assistant

Elizabeth Hernden, NP
Nurse Practitioner

Laurie Chavez
Laurie Meyer, NP
Nurse Practitioner

Zachary Retzler, PA-C
Physician Assistant


Julie Johnson
Residency Coordinator
Phone: 989-746-7857