Greg Browning, PhD

Dr. Browning earned his PhD in Organic Chemistry at the University of Texas at Arlington. He serves as a discipline director of routine chemistry at Labcorp and is certified as a clinical chemist with the National Registry of Certified Chemists (NRCC-CC).

Dr. Browning also is a member of the American Association for Clinical Chemistry and the American Chemical Association.

Deborah Sesok-Pizzini, MD, MBA

Dr Sesok-Pizzini serves as Chief Medical Officer of Labcorp Diagnostics and discipline director of immunohematology. She earned her medical degree from the Penn State College of Medicine and did her residency and fellowship at The University of Pennsylvania’s Perelman School of Medicine. She also graduated from Villanova University, with a Master of Business Administration degree with a concentration in finance.

Deborah Sesok-Pizzini, MD, MBA

Dr Sesok-Pizzini serves as Chief Medical Officer of Labcorp Diagnostics and discipline director of immunohematology. She earned her medical degree from the Penn State College of Medicine and did her residency and fellowship at The University of Pennsylvania’s Perelman School of Medicine. She also graduated from Villanova University, with a Master of Business Administration degree with a concentration in finance.

Crystal Icenhour, PhD

Dr. Icenhour graduated from the University of Cincinnati College of Medicine and serves as a discipline director of molecular microbiology at Labcorp. Other areas of specialty include esoteric microbiology, infectious disease immunology, molecular genetics and genomics and molecular infectious disease.

Dr Icenhour is a member of the Infectious Diseases Society of America and the American Society for Microbiology, affiliated with Duke University Medical Center. Visit her LinkedIn page.

Crystal Icenhour, PhD

Dr. Icenhour graduated from the University of Cincinnati College of Medicine and serves as a discipline director of molecular microbiology at Labcorp. Other areas of specialty include esoteric microbiology, infectious disease immunology, molecular genetics and genomics and molecular infectious disease.

Dr Icenhour is a member of the Infectious Diseases Society of America and the American Society for Microbiology, affiliated with Duke University Medical Center. Visit her LinkedIn page.

Caressa Y. Cooper

Mrs Cooper graduated with a bachelor of science degree in medical technology from Old Dominion University in Norfolk, VA. A co-discipline director for semen analysis, she is based out of the Chesapeake Stat Lab in Chesapeake, VA.

Caressa Y. Cooper

Mrs Cooper graduated with a bachelor of science degree in medical technology from Old Dominion University in Norfolk, VA. A co-discipline director for semen analysis, she is based out of the Chesapeake Stat Lab in Chesapeake, VA.

Brett Holmquist, PhD, DABCC, FAACC

Dr. Holmquist earned his PhD in interdisciplinary life sciences from the University of California. He is board-certified in clinical chemistry and holds laboratory director qualifications in California and New York. He serves as a member of the American Association of Clinical Chemistry (AACC), the Endocrine Society, the American Society for Mass Spectrometry (ASMS), Clinical Laboratory Standards Institute (CLSI) and is a founder of the Los Angeles Metropolitan Mass Spectrometry Group (LAMMS).

Brett Holmquist, PhD, DABCC, FAACC

Dr. Holmquist earned his PhD in interdisciplinary life sciences from the University of California. He is board-certified in clinical chemistry and holds laboratory director qualifications in California and New York. He serves as a member of the American Association of Clinical Chemistry (AACC), the Endocrine Society, the American Society for Mass Spectrometry (ASMS), Clinical Laboratory Standards Institute (CLSI) and is a founder of the Los Angeles Metropolitan Mass Spectrometry Group (LAMMS).

Brandon Jarisch

Mr Jarisch graduated from Weber State University in Ogden, UT, with a bachelor of science degree in medical laboratory science. He received board certification as a medical laboratory scientist through the American Society of Clinical Pathologists, of which he is a member. He also is a member of the American Association of Clinical Chemistry and the American Society for Quality.

At Labcorp, Mr Jarisch is Quality Manager for the Houston satellite laboratories, as well as discipline director for satellite labs and waived testing, and semen analysis.