Current and Past Residents

During the past fifteen years, a total of 47 men and 19 women have completed the Senior Residency in General Surgery. Three followed their training with military service. Following training and fellowship, 41 are currently in private practice, twelve are in academic surgery, and eleven are currently in their fellowship training.

Twenty-eight continued their training with fellowships in the following areas. 

  • Burn
  • Breast
  • Cardiac
  • Colorectal Surgery
  • Hepatobiliary & Pancreas
  • Minimally Invasive Surgery
  • Pediatric Surgery
  • Plastic Surgery
  • Psychiatry
  • Trauma/Critical Care  
  • Vascular Surgery

Following training and fellowship, 35 are currently in private practice, nine are in academic surgery, and eight are currently in fellowship training. 

Go to: 

Current Residents
Resident Testimonials
Recent Graduates

Current Residents Program Years 1-5


PG5 – Chief Residents

Sigrid Johannesen, M.D., University of Oklahoma College of Medicine
Kayla Watkins, M.D.,University of Oklahoma College of Medicine
Jesse Conner, M.D., Texas A & M University System, HSC, College Of Medicine
Oscar Talledo Zevallos, M.D.,Universidad de San Martin de Porres
Cressilee ​Bryant, M.D.,University of Oklahoma College of Medicine
Mohd Qutob, M.D.,University of Jordan Faculty of Medicine


Front Row

Kiran Venincasa, M.D., University Of Miami LM Miller School Of Medicine

Heidi Mahnken, M.D., University of Oklahoma College of Medicine

Back Row

Paul McGaha II, M.D., University of Texas Medical Branch At Galveston

Mohamad Sidani, M.D.,American University of Beirut

Arthur Grimes, M.D.,Louisiana State University School of Medicine In Shreveport (Research)

Chance Nichols, M.D.,University of Oklahoma College of Medicine

Noah Rozich, M.D.,University of Wisconsin Medical School


Front Row

Aditi Jalla, M.D., University of Oklahoma College of Medicine

Francesca Boulos, M.D., University of Vermont College of Medicine

Back Row

Maureen Mannas, M.D., University of Oklahoma College of Medicine

Bailey Kleis, M.D., University of Oklahoma College of Medicine

Jaclyn Isabella, M.D., Louisiana State University School of Medicine In Shreveport

Samara Lewis, M.D., Texas Tech University HSC School of Medicine (Research)

Rachael Palumbo, M.D., Loyola University of Chicago, Stritch School of Medicine


Front Row

Tyler Leiva​, M.D., Louisiana State University School of Medicine Shreveport

Andrew Murphy, M.D., Louisiana State University School of Medicine Shreveport

Back Row

Lindsay Lindsey, M.D., University of South Alabama College of Medicine

Taylor Martin, M.D., University of Oklahoma College of Medicine

Areej Sami, M.D.,  Indiana University School of Medicine

Andrea Geddes, M.D., University of Colorado School of Medicine


Front Row

Lily Nguyen, M.D., Texas A&M University College of Medicine

Taylor Burt, M.D., University of Oklahoma College of Medicine

Middle Row

Jordan Miller, M.D., Prelim University of Oklahoma College of Medicine

Joy Trimble, M.D., University of Tennessee College of Medicine

Back Row

Jack Maxwell, M.D., Prelim University of Oklahoma College of Medicine

Connor Wilkinson, M.D., University of Oklahoma College of Medicine

Jacob O’Dell, M.D., R Franklin University of Medicine & Science/Chicago Medical School

Christopher Jeffery, M.D., University of Oklahoma College of Medicine

Jake Keeling, M.D.,  Prelim University of Oklahoma College of Medicine

Current Resident Testimonials

PG5 –  Kayla Watkins, M.D.
OU College of Medicine

"As a medical student at OU, I remember being so impressed with all of the chief residents…how competent and confident they were.  I was so excited to match here and get to learn from some of the best.  I have experienced the reasons why all of my former chiefs were so successful. There are countless reasons why this place is so great but #1 is the people.  First, you won’t find a better program coordinator (or work mom) than SuAnn and you can’t find a better/more supportive program director than Dr. Lees. My co-residents have become my second family and this program introduced me to my now (almost) husband…added plus! Second, the training.  This place is full of supportive attendings with big personalities that will shepherd you, support you and want you to do well and be prepared in your career whether that’s private practice or fellowship.  I’d choose this place over and over again!"


PG4 – Kiran Venincasa, M.D.
University of Miami Leonard Miller School of Medicine

"'Love what you do, and never work a day in your life.' My intern year at OU has been more fun than I could possibly imagine. There's a strong sense of family here with our group of residents and the upper levels and attendings have been incredibly supportive. During your PGY1 year, you not only take responsibility for floor patients, but begin learning about critical care by taking care of trauma ICU patients at an early stage. Our upper levels have been amazing at pushing us to be in the OR as often as possible for level-appropriate cases and to learn the basics of general surgery with central line and tube placements. OU is unique in being the only Level 1 trauma center in the state. The learning experience offered with the diverse injuries seen in our trauma bay is unmatched elsewhere. Living in OKC has been such fun - there's great food, outdoor activities, and some of the friendliest people you'll ever meet! Residency is supposed to be some of the hardest and best years of your's definitely been off to a great start at OU!"

PG5 – Oscar Talledo, M.D.
Universidad de San Martin de Porres, Peru

"There is no greater feeling that the ones of belonging and camaraderie at the work place; since day one residents, attendings and the non-medical staff here at OUHSC have been very welcoming and helpful. I was looking for a prestigious hospital and one in which I could perform hands-on learning, and definitely OUHSC is both. As a first year resident, I've already spent more time in the OR as I anticipated and learned something different in every rotation.  I have no doubt, as watching my seniors surgical skills, that when my training is over I'll be able to thrive in any surgical field. Medicine aside, OKC is a fun place to live and settle down."

PG3 – ​Aditi Jalla M.D.
University of Oklahoma College of Medicine

​"When I started medical school here at the OU College of Medicine four years ago, being a surgeon was the last thing on my mind. But once I started the surgery clerkship, I realized I never wanted it to end. Not only are the residents and attendings smart and capable clinicians, they are the kinds of leaders and mentors who make me think 'THIS is who I want to be when I grow up.' It is because of this program that 19 of my med school classmates are training in general surgery residencies this year, and I am one of the luckiest, because I get to stay here at the great University of Oklahoma. I've seen residents graduate from here and immediately step into being autonomous general surgeons as well as match into competitive fellowships. The OU General Surgery program is incredible and I could go on and on about it, but the single most attractive quality are the residents who make it up. We get each other through the rough days, and we actually enjoy hanging out with one another outside of work. Whether it’s backyard barbecues, happy hours, escape rooms, or sporting events (#ThunderUp, #BoomerSooner), OKC is an awesome big-small city with something for everyone, and I couldn’t have found better and more fun people to share it with."

PG3 – ​Jackie Isabella, M.D.
​Louisiana State University SOM Shreveport, LA

"During my fourth year of medical school I came to the University of Oklahoma for an away rotation thanks to one of my friends (and now co-residents) encouraging me to come see all the program had to offer. I fell in love with the program, faculty and residents while visiting, but when my month was over I had an entire interview season ahead of me. I was excited to see what was in store with other programs, but little did I know I had already found my “home". Throughout all of my interviews I found myself comparing every program to OU, and everything else fell short. Now a few months into my intern year, I couldn’t be happier with my decision. The residents and faculty weren’t what I thought they would be while here during medical school, they’re even better! The atmosphere and camaraderie we have here is second to none and it truly makes this Louisiana girl feel right at home.

For the surgical education, I feel as if I have grown leaps and bounds in a few short months on my path to becoming a surgeon. I see how competent and knowledgeable my senior residents are, and I know I’m in a place where I will be come as capable as they are. We get very early exposure, not to just see, but to actually participate in and do procedures from the start of internship. Oklahoma City is also a wonderful place to live. My husband Sean and I were both drawn to how affordable it is to live in OKC, yet we’re still in a major city with great food, sports and entertainment. I never thought there would be room in my heart for anything other than my LSU Tigers, but OU is is quickly finding its place, and I couldn’t be happier to be a part of General Surgery at the University of Oklahoma."

PG2 – ​​Andrew Murphy, M.D.
​Louisiana State University SOM Shreveport, LA

"The transition from medical school to residency was one that I was nervous, yet anxious to begin. The expectations of never ending, exhausting days were quickly wiped away when I began the first day of intern year. Being surrounded by such a supportive, hard working, and enjoyable group of surgical residents and attendings make the days go by in a breeze. While on the interview trail, OU stuck out to me as being a top tier institution with an academic focus while maintaining a plethora of early operative experience. I have far surpassed the amount of hands-on experience I expected to obtain in my first few months of being an intern, and this speaks to the nature of the program and why I wanted to come to OU. My wife and I feel at home here in OKC and we have only begun to explore all of what this city offers. There is truly no better place to pursue a competitive surgical residency while still maintaining a healthy work-life balance. I am truly overjoyed to come to work each day and welcome any questions you may have! Welcome to OU!"

PG3 – ​​​Bailey Kleis, M.D.
OU College of Medicine

"I couldn’t have been happier when I opened my envelope on match day to find out I would be staying at OU for residency. This program met all the criteria I was looking for to pursue general surgery. Our program is one that exposes you to many different services, allows you to see uncommon cases, and gives you the opportunity to work with a diverse patient population. The attendings are eager to teach and have set great examples for the type of surgeon I would like to be. The heart of any program, however, is the residents. It’s true what they say about your co-residents becoming your family, and I couldn’t have picked a better one. No one shares in your triumphs or mistakes quite as much as your classmates and it’s nice to know there are people to count on when residency gets hard. They’ve accepted an SEC girl like me and convinced her to also root for OU. (Although I can’t help but yell “WAR EAGLE” when I get the chance."


PG3 ​– ​​​​Rachael Palumbo, M.D.
​Loyola University of Chicago, Stritch SOM Chicago, IL

"At OU surgery I’m the Alanis Morissette, and also maybe the one who would be a DJ or weather lady if I couldn’t be a surgeon. But, I can be one- thanks to University of Oklahoma.I selected OU as a training program because I wanted to have a choice by the end of my residency to decide whether I wanted to operate as a private general surgery or to enter a speciality field. From what I experienced interview day, I knew OU surgery offered a great trauma experience, high volume, and, perhaps, my type of cool, weird people.  Since joining the Sooner nation, I have since discovered the reasons why I think OU is the best, which are as follows:

The people. As a surgery resident you will see, do, and feel things I didn’t think I would ever experience. From massive traumas to curing cancer to fixing 'just' a hernia, you will be at the highest of highs and lowest of lows. At OU, I found my people to do it with. I like coming to work because all my friends are at work. Where else would I want to be?

The patients. This one was different for me. Coming from Chicago which has a myriad of health care systems, I was not accustomed to patients coming to our hospital because we were the hospital for higher care. OU medicine offers the highest level of surgical care for the state of Oklahoma, and as residents, we get to right in the middle. Moreover, as residents at OU, we have the opportunity to provide healthcare to the underserved and uninsured population, which is an awesome perk in itself.

The experience and faculty. Surgery is cool in so many ways, and lots of people need surgery. Every day I learn more about the patient surgeon relationship, and we have some of the best mentors to make sure that happens.

Finally, shoutouts to Noah the wellness fish, SuAnn, and Dr. Lees. We couldn’t do any of this without them.

So overall, this is an great program even for the big city kid. Oklahoma City is on the rise. We even have a monorail now!" 


PG1 Taylor Burt, MD and PG1 Connor Wilkinson, M.D.
OU College of Medicine

"We were so excited to learn that we had couples matched here at the University of Oklahoma. Having gotten to know the residents as medical students, we knew they were not only well-trained surgeons but also the type of people we wanted to spend our days with. There is an environment of collegiality that is unmatched here at OU. All of our expectations have been met and more in our first couple of months of residency. We have had early exposure to the operating room, our clinical decision making has been tested by management of patients on the floor and we have certainly learned the value of time management all while getting to learn from faculty that genuinely want to see us succeed. Throughout our residency interviews, we were constantly comparing programs to OU and we found that not many measured up to the standard set by this program. We also love living in OKC! Even as Oklahoma natives, we are still discovering new places to explore and we never run out of ways to spend our free time. From Sooner football games, to the awesome food scene, there is never a dull moment." 

Recent Graduates 

Benjamin Axtman, MD Trauma/Critical Care Fellowship, University of Texas San Antonio, TX
Christopher Henry, MD Vascular Surgery Fellowship, Baylor University, Dallas, TX
Mary Lindemuth, MD Breast Fellowship, Johns Hopkins, Baltimore, MD
Cullen McCarthy, MD Vascular Fellowship, Wake Forest University, Winston-Salem, NC
Emily Switzer, MD Trauma/Critical Care Fellowship, University of Southern California, Los Angeles, CA

Ademola Adeseye, MD: Cardiac Fellowship, Texas Heart Institute/Baylor COM, Houston, TX
Morgan Bonds, MD: Hepato-Pancreato-Billiary Fellowship, Virginia Mason, Seattle, WA
Magendran Danapal, MD: Vascular Surgery Fellowship, Carolinas Medical Center, Charlotte, NC
Alessandra Landmann, MD: Pediatric Surgery Fellowship, University of Oklahoma, Oklahoma City, OK
Frank Wood, MD: Trauma Critical Care Fellowship, University of Louisville, Louisville, KY

Fadi Balla, MD: MIS Fellowship, Emory Endosurgery, Emory University SOM, Atlanta, GA  
Juan Claros Sorto, MD: Breast Fellowship, Texas Tech University Health Science Center, Lubbock, TX 
David Freeman, MD: Private Practice General Surgery, Albuquerque, NM
Benjamin Greif, MD: Army  
Alex Schutz, MD: Cardiac Fellowship, Texas Heart Institute/Baylor COM, Houston, TX

Kristina Booth, MD: Colorectal Fellowship, Texas Health Presby/UT Southwestern, Dallas, TX 
Jessica Enix, MD: Private Practice General Surgery, Chickasaw Nation Med Center, Ada, OK
Jeremy Irvan, MD: Vascular Fellowship, Geisinger Commonwealth SOM, Danville, PA
Luciano Poggi, MD:​ MIS Fellowship, St. Vincent Hospital, Indianapolis, IN
Alex Raines, MD: Academic Medicine, General Surgery University of Oklahoma

Abigail Maze-White, MD: Private Practice General Surgery 
Timothy Weaver, MD: Private Practice General Surgery 
Ryan Wicks, MD: Private Practice General Surgery 
Douglas Wiseman, MD: Private Practice General Surgery 

Edgar Bedolla, MD: Plastic Surgery Fellowship 
Juan L. Calisto, MD: Trauma Critical Care Fellowship 
Stephen G. Hersperger, MD: Trauma Critical Care Fellowship 
Jeremy J. Johnson, MD: Pediatric Surgery Fellowship 
David W. Shepherd, MD: Private Practice General Surgery