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About Us

Lab Members

Michael Armstrong, BS
Senior Professional Research Assistant

is a graduate of the University of Northern Colorado with a Bachelor’s Degree in Biology with a Minor in Chemistry. Previous to working in the School of Pharmacy Mass Spectro​​metry Facility, Michael was a senior analytical chemist at Severn Trent/Core Laboratories for 9 years. His professional interests include mass spectrometry based metabolomics and analytical chemistry. He has over 20 years of mass spectrometry and analytical chemistry experienc​e.

Charmion Cruickshank-Quinn, PhD
Post-Doctoral Researcher
Charmion obtained her Chemistry BS from SUNY Albany and her Chemistry PhD from SUNY Buffalo where she gained experience in electrochemistry, metals analysis using ICP-OES, method development, and mass spect​rometry inclu​ding LC-MS, GC-MS, FTICR MS, and probe EI. For her current Post-doctoral work, Dr. Cruickshank-Quinn identifies perturbed metabolic pathways in COPD using human samples and mouse models of emphysema, and integrates gene and metabolite data for a more comprehensive understanding of the mechanisms of COPD.

Katrina Doenges, MS
Senior Professional Research Assistant

Kat earned her MSc(Hons) in Environmental Chemistry from the University of Canterbury (Christchurch, New Zealand) and her BSc in Chemistry and Biochemistry from the University of California, Santa Cruz.  She is skilled in various wet chemistry techniques and has some experience with ICP-MS and other instruments for detecting heavy metals and pesticides.  Kat is new to metabolomics, but is quickly learning different sample preparation protocols, how to run the mass spec instruments and how to analyze data.  She is looking forward to increasing her knowledge and abilities in these areas, as well as learning more about the administrative side of running a lab.​

Marc Elie, PhD
Post-Doctoral Researcher

Marc graduated from Florida State University with a Bachelor’s Degree in Chemistry and from the University of Central Florida with a PhD in Environmental Chemistry.  His professional interests involve the use of metabolomics for toxicological and clinical research, LC/MS method development, LC/MS instrumentation, GC-MS based analyses and biomarker discoveries.  He is currently a Postdoctoral Research Fellow at the UCD SOP Metabolomics Facility.

Brian Tooker, MS
PhD Candidate 

Brian Tooker received his B.S. in Microbiology in 2000 and his M.S. in Animal Science in 2003, both from Michigan State UniversityAfter researching the T cell mediated occupational disease, Chronic Beryllium Disease, for nearly 10 years, Brian joined the Molecular Biology Program at CU Denver in the fall of 2015. Brian is currently interested in learning how polycyclic aromatic hydrocarbons differentially drive metabolome alterations in different immunologically relevant cell types.


Cole Michel, BS
Professional Research Assistant

Cole graduated from the University of Wisconsin – Madison with a bachelor’s degree in biochemistry. His professional interests are in proteomics, LC/MS method development, and utilizing analytical chemistry techniques for drug discovery. He has 6 months of mass spectrometry experience and 5 years of analytical chemistry experience.

Kevin Quinn, PhD
Post-Doctoral Researcher

Kevin obtained his B.S. in Chemistry from Saint John Fisher College and his Ph.D. from SUNY Buffalo where he gained experience in method development, and mass spectrometry instrumentation including LC-MS, and FTICR MS. For his current Post-doctoral work, Dr. Quinn uses mass spectrometry based assays to find perturbed metabolomics pathways in various biofluids to determine the underlying mechanisms associated with asthma.

Nichole Reisdorph, PhD
Associate Professor

Nichole received her MS in Biology and her PhD in Molecular Biology and Biochemistry at the University of South Dakota School of Medicine.  She was trained in mass spectrometry and proteomic applications at the Scripps Research Center in La Jolla, CA and has extensive background in molecular biology with an emphasis on protein biochemistry techniques.  Nichole is an Associate Professor in the Skaggs School of Pharmacy and she directs the UCD SOP Mass Spectrometry Core Facility.

Richard Reisdorph, PhD
Associate Research Professor

Rick received his PhD in Molecular Biology and Biochemistry from the University of South Dakota School of Medicine and was a fellow with Peter Vogt at the Scripps Research Institute in La Jolla, CA.  His work includes developing quantitative metabolomics and proteomics techniques and bioinformatics.  He is currently the Assistant Director of the UCD SOP Mass Spectrometry Core Facility.

Scott Walmsley, PhD
Research Instructor

Scott received a Bachelor degree in Biological Sciences and a PhD in Cell and Molecular Biology from Colorado State University.  After a 9 year stint in industry, he returned to graduate school to study renal physiology using proteomics and pursued further training in proteome informatics at the University of Michigan.  His current interests are in computational methods development for metabolomics and renal physiology, and has 18 years combined laboratory and informatics experience.

David Stein

Core Business Operations Coordinator

David is a gradutate of Florida International University with a B.A. in Business. Prior to joining the School of Pharmacy, he was enlisted in the Army, working in signal intelligence analytics for eight years. David has 15 years experience in business analytics.