Dr. Lori Sokoll Clinical Chemistry

Clinical Chemistry Fellowship


The fellowship is a one- or two-year Commission on Accreditation in Clinical Chemistry (ComACC)-approved program that provides MD pathologists and PhD scientists with analytical, clinical, research, and management experience towards specialization and board certification in clinical chemistry.

The first year of the program begins with an 8-week clinical rotation covering the fundamentals of all areas of clinical chemistry. In-depth preanalytical/automation, general and special chemistry, and drug assay rotations as well as rotations in other Pathology Laboratories are completed in the first year. Throughout the program, the fellow will present seminars and attend departmental and divisional meetings. The structure of the program is flexible to afford individualized training based on previous experience. Click here to view an example of a trainee timeline.

Unique Clinical Experience

The Chemistry Division performs over seven million tests each year and provides 24 hour service to The Johns Hopkins Hospital, the Bayview Medical Center, and several community outpatient facilities. Our program is designed to provide training in the operation of a clinical laboratory, quality control and assurance, laboratory management, analytical methodologies and test interferences. The clinical interpretation and diagnostic relevance of tests is emphasized through clinical consults. The fellow will be expected to learn the basic principles of clinical chemistry and apply this knowledge as a director-trainer of a high volume clinical laboratory.

Service aspects of the program involve clinical consultation and problem solving leading to on call (pager) responsibility as a Chemistry Resource Person. Fellows rotate through routine automated chemistry (high volume testing), critical care/emergency medicine (blood gases, stat testing), special chemistry (immunoassay for endocrine function and tumor markers, trace metal analysis), and toxicology (analysis of therapeutic and abused drugs) laboratories, as well as immunology, hematology, and molecular diagnostics laboratories.

Research Opportunities

Participation in clinical laboratory-oriented research projects will allow the fellow to gain a working knowledge of analytical and quality control goals and managing day-to-day activities. Research projects could involve method development, test validation, diagnostic utility and cost effectiveness of testing or other clinical and scientific investigations in any of the areas within clinical chemistry.

During the two-year fellowship, trainees will also complete applied laboratory-oriented research projects and develop expertise in a specific area of research with a selected faculty member. In addition, there are opportunities to conduct translational research through:


Applicants must have an earned MD or PhD (or an equivalent doctoral degree) in the basic sciences; chemistry, biology or physics from an accredited university or college. Applicants should have successfully completed enough chemistry courses to apply to the American Board of Clinical Chemistry, i.e., a minimum of 30 semester hours (or equivalent) in undergraduate and/or graduate level chemistry or biochemistry courses taken at institutions acceptable to the Board.


Deadline for applications is September 1, for fellows applying for a start date of July the following year.

Formal interviews begin no earlier than September 1 (short informal discussions e.g. via phone or at ADLM meeting may be conducted prior to September 1).

Offers will be extended to the selected candidate no earlier than October 1.

Candidates will be given a window of at least 2 weeks from the time of notification to consider the offer.

Send the application (via email) to:

William Clarke, Ph.D., M.B.A., Program Director
Mark Marzinke, Ph.D., Program Director

Phone: 410-502-7692
Fax: 410-955-0767
Email: [email protected], [email protected]

Our Faculty

Daniel Chan, Ph.D.

Daniel Chan, Ph.D.
Director, Clinical Chemistry Division
Research Interests

William Clarke, Ph.D.

William Clarke, Ph.D., MBA
Fellowship Program Director & Director, Clinical Toxicology
Research Interests

Mark Marzinke, Ph.D.

Mark Marzinke, Ph.D.
Fellowship Program Director & Director, General Chemistry
Research Interests

Lori Sokoll, Ph.D.

Lori Sokoll, Ph.D.
Associate Director, Clinical Chemistry Division & Director, Special Chemistry Laboratory
Research Interests

Hui Zhang, Ph.D.

Hui Zhang, Ph.D.
Director, Mass Spectrometry Core Facility
Research Interests

Zhen Zhang, Ph.D.

Zhen Zhang, Ph.D.
Associate Director, Center for Biomarker Discovery and Translation
Research Interests

Current Fellows

Nadia Ayala-Lopez, Ph.D., MLS

Nadia Ayala-Lopez, Ph.D., MLS

Kyanna Garza

Kyana Garza

Former Fellows

AACC 2018 alumni breakfast

Former fellows Omar Laterza, Stefani Thomas, Shu-Ling Fan, Alex Rai, William Clarke, Claire Knezevic, Allison Chambliss, Lori Sokoll, Jinong Li, Jeff Chance, Daniel Chan, Jim Nichols at the AACC 2018 Hopkins Alumni Breakfast, Chicago, IL.

Fellow Current Position
Lori J. Sokoll, Ph.D. Professor, The Johns Hopkins University
Associate Director of Clinical Chemistry
The Johns Hopkins Hospital, Baltimore, MD
Dai Li, M.D., Ph.D. Clinical Director
AIBioTech, Richmond, VA
Jeffrey Chance, Ph.D. Senior Manager, Medical Affairs - PLM Containment BD Life Sciences - Preanalytical Systems, BD, Franklin Lakes, NJ
Scott Kuzdzal, Ph.D. Vice President, Marketing
Shimadzu Scientific Instruments, Columbia, MD
William Clarke, Ph.D., M.B.A. Professor, The Johns Hopkins University
Director of Clinical Toxicology and Point-of-Care Testing
The Johns Hopkins Hospital
Alex J. Rai, Ph.D. Associate Professor, Department of Pathology and Cell Biology, Columbia University
Director, Special Chemistry Laboratory and Chief Scientific Officer
Center for Advanced Laboratory Medicine, Columbia University Medical Center
George Kunz, M.D. Pathologist
Norton Healthcare, Lexington, KY
Scott J. Cameron, M.D., Ph.D. Cardiologist and Assistant Professor, Departments of Medicine and Surgery
University of Rochester, Rochester, NY
David A. Colantonio, Ph.D. Assistant Professor, Department of Pathology and Lab Medicine, University of Ottowa
Clinical Biochemist, The Ottawa Hospital/EORLA, Ottowa, Ontario, Canada
Shu-Ling Fan, Ph.D. Associate Professor, Department of Pathology and Director of Chemistry Laboratories
University Massachusetts Medical School, Worcester, MA
Danni Li, Ph.D. Associate Professor and Director of Clinical Chemistry, Department of Laboratory Medicine and Pathology
University of Minnesota, Minneapolis, MN
Jinong Li, Ph.D. Scientific Reviewer, Division of Chemistry and Toxicology Devices, Office of In Vitro Diagnostics
US Food & Drug Administration, Silver Spring, MD
Joely Straseski, Ph.D. Associate Professor, University of Utah School of Medicine
Medical Director, Endocrinology Laboratory
ARUP Laboratories, Salt Lake City, UT
Dylan Bach, M.D., M.B.A. Clinical Professor, University of California Irvine School of Medicine
Founder, CEO, and Director Clinical Pathology
Bach Diagnostics, Santa Ana, CA
Mark Marzinke, Ph.D. Associate Professor of Pathology and Medicine, The Johns Hopkins University; Director of General Chemistry and Director of Clinical Pharmacology Analytical Laboratory, The Johns Hopkins Hospital
Anna Fuezery, Ph.D. Associate Clinical Professor, University of Alberta
Regional Clinical Biochemist, Alberta Health Services; Edmonton, Alberta, Canada
Col. Claudia Henemyre, Ph.D. Commander
Forensic Toxicology Drug Testing Laboratory, Fort Meade, MD
Athena Petrides, Ph.D. Assistant Professor, Harvard Medical School
Medical Director for Pathology Informatics and Assistant Medical Director of Clinical Chemistry
Brigham & Women's Hospital, Boston, MA
Chris Crutchfield, Ph.D. Assistant Professor, University of Cincinnati
Director of Clinical Chemistry and Toxicology, University of Cincinnati Heath, Cincinnati, OH
LTC David Sartori, Ph.D. Director, Division of Forensic Toxicology
Armed Forces Medical Examiner System, Dover, DE
Allison Chambliss, Ph.D. Assistant Professor of Pathology, University of Southern California
Director of Clinical Chemistry and Point of Care Testing, LAC+USC Medical Center, Los Angeles, CA
Ventzi Hristova, Ph.D. Scientist II
Claire E. Knezevic, Ph.D. Assistant Professor of Pathology, The Johns Hopkins University
Director of Critical Care Laboratories and Pre-Analytical Testing and Co-Director of Drug Assay Laboratory, The Johns Hopkins Hospital
Stefani Thomas, Ph.D. Assistant Professor of Laboratory Medicine and Pathology, University of Minnesota
Associate Director of Masonic Children's Hospital Acute Care Laboratory, Minneapolis, MN
Steven E. Conklin, Ph.D. Assistant Professor
Tufts University School of Medicine

The Clinical Chemistry Division

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