Our success is intimately linked to the accomplishments of each and every member of our department.
Each month, four members are nominated and featured to celebrate their commitment to patient care, education, and research.
Current Featured Anesthesiology Department Members

Andrew Griesbaum, ACNP
Nurse Practitioner

Qin Liu, PhD
Professor of Anesthesiology

Jake Meinkoth
Clinical Informaticist

Sydney Tyler, MD
Resident Physician
Featured Anesthesiology Department Members Archive
John Luker, ACNP
Nurse Practitioner
Department of Anesthesiology Featured Member: December 2020
John is a recent graduate Adult-Gero Acute Care Nurse Practitioner working with the Division of Critical Care in the Surgical ICU at Barnes-Jewish Hospital, the ICU at Christian Hospital, and the Tele-ICU. He was raised in central Illinois and graduated with bachelor’s degrees in Biological Sciences and Nursing from SIUE, moved to St. Louis to work as a Trauma-Neuro ICU RN at a Level I trauma center, and eventually attended Goldfarb School of Nursing to graduate with an M.S.N. His favorite aspect of nursing is the privilege of meeting and connecting with critically ill patients and their families while assisting in optimizing their chances of a safe, speedy and maximal recovery. He’s forever amazed by the courage, humor, and strength in adversity displayed by ICU patients and their families, in addition to the coworkers staffing the units.
John’s favorite professional interest so far, aside from the privilege of working on a bedside team caring for the critically ill, included leading a departmental Practice, Quality and Research Professional Governance Council. Professional Governance provided a conduit for a motivated and talented interdisciplinary mix of RNs, hospital leadership, and interdepartmental representatives to work together to bring Quality Improvement and Evidence-Based Practice to the ICUs with the primary goal of improving patient outcomes. Topics of personal interest include spinal cord injury care and education, therapeutic hypothermia after cardiac arrest, fever control and shivering in the ICU, and the A-F ICU liberation bundle.
Outside of work, John enjoys spending time with his wife, Kayla (who is also an NP), going on walks with their 90-lb AmStaff “Gryffin,” reading, and working out. He’s fallen in love with St. Louis thanks to its delicious food, beautiful parks, and wonderful zoo and museums.
Herman Luther, MD, MBA
Resident Physician, Class of 2024
Department of Anesthesiology Featured Member: March 2022
Herman is a current resident physician in the Department of Anesthesiology. Prior to residency, he studied Biology and Economics at Washington University in St. Louis before attending the University of Chicago where he obtained his MD and MBA with a concentration in operations management. He has a passion for quality improvement, patient safety, and medical device development. He also takes special pride in ensuring each of his patients feels comfortable and confident in his care before every operative case.
Outside of the hospital, you can often find him trying out new restaurants with his wife, playing tennis with friends, gardening in the backyard of his CWE home, or riding his bike through Forest Park!
Devin Macklin
Research Technician I
Department of Anesthesiology Featured Member: June 2024
Devin Macklin graduated from Xavier University of Louisiana in the spring of 2023 with a Bachelor of Science in Chemistry. In the summer of 2023, he participated in the ASSURE Program, gaining valuable insight into research and anesthesiology. Following ASSURE, Devin continued to work in the department as a research technician in the Pradhan lab, where he assists in investigating novel therapeutics for migraine. In his free time, Devin loves to listen to music and podcasts, work out, and create via mediums such as writing, music production, and photography.
Jennifer Mahan
Staffing Administrator
Department of Anesthesiology Featured Member: March 2022
Jennifer (Jen) is a staffing administrator for the Department of Anesthesiology. She has worked for WashU, and the department, for a little over six years. In her role, Jen works closely with daily schedulers and clinical leaders to ensure that OR staffing and operations run smoothly on a daily basis. She is also the trauma fellowship coordinator for the department, working closely with the trauma anesthesia director for all things trauma.
Jen has two girls, 11 and 7, and a boxer mix, that keep her busy when she’s not working. She enjoys being outside, attending sporting events, and watching movies.