100% of the Chemistry Department’s full-time professors have Ph.D.s. They also have expertise in multiple areas of their respective disciplines. This gives the student a broad integrative approach to each course taken. Faculty seek to provide an educational experience that integrates academic excellence with Christian character, world view, and service.

Full-time Faculty

Ted Lorance, Ph.D.

(714) 619-6467
Professor of Chemistry

B.A. 1995, Southern California College (now Vanguard University of Southern California)
Ph.D. 2000, University of Arizona.
Postdoc, Arizona State University

Member of American Chemical Society. Author of articles in professional journals and presenter of papers at professional society meetings. Dr. Lorance’s research interests lie in the accurate prediction of the course and rate of both gas- and solution-phase organic reactions, particularly those involving open-shell species or under unusual conditions, using computational methods.

Dr. Lorance teaches: Chem 120/L Chem 121/L, Chem 304/L, Chem 305/L, Chem 310, Chem 442, Chem 456/L, Chem 457, Chem 458, and Chem 485.

Tara M. Sirvent, Ph.D.

(714) 619-6469
Chemistry Department Chair and Associate Professor of Biochemistry

B.A. 1996, Southern California College (now Vanguard University of Southern California)
Ph.D. 2001, Cornell University
Postdoc, Boyce Thompson Institute for Plant Research

Member of the American Chemical Society (ACS), American Society for Biochemistry and Molecular Biology (ASBMB), the Phytochemical Society of North America (PSNA), the American Association for the Advancement of Science (AAAS), and the Herbal Society of America (HSA). Dr. Sirvent’s research interest lies in Natural Products Chemistry with a focus on phytomedicinal plants. She actively recruits undergraduates (especially freshmen) in research. Her students present their research results at National and Regional Conferences.

Dr. Sirvent coordinates the Summer Undergraduate Research Program (SURP) which affords undergraduates an opportunity to participate in Undergraduate Research (UGR). She is also the faculty sponsor of the student group, SAINTS (Student Affiliates in Natural and Technological Sciences). SAINTS is nationally chartered as a SAACS group (Student Affiliates of the American Chemical Society) and Dr. Sirvent is the advisor.

Dr. Sirvent teaches: Chem 113/L, Chem 305/L, Chem 430/L, Chem 435 and Chem 475.

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Adjunct Faculty

Chemistry Adjunct Office: (714) 619-6466

John Terhorst, Ph.D.john_pro

Adjunct Professor of Chemistry

B.S., 2006, University of Redlands, Chemistry, Biology.
M.S., 2008, Yale University, Chemistry.
Ph.D., 2011, Yale University, Chemistry.
Member of the American Chemical Society (ACS).

Dr. Terhorst’s research is in the area of computational organic chemistry and chemical theory, focusing particularly on using computer simulations to develop therapeutic agents targeting infectious, inflammatory, and hyperproliferative diseases. Other related topics include physical organic chemistry, molecular mechanics, and conformational dynamics. At Vanguard, he teaches CHEM 112C-113, CHEM 304-305, and CHEM 308, and he coordinates the Summer Undergraduate Research Program (SURP).

Anja Rosengarth, Ph.D

Adjunct Professor of Chemistry
Ph.D., University of Munster, Germany 
Postdoctoral, Molecular Biology & Biochemistry/Structural Biology, University of California, Irvine. 
Member of the American Chemical Society (ACS).

Dr. Rosengarth’s major interest lies in protein folding and stability as well as the three-dimensional structure of the membrane-associated proteins. During her postdoctoral studies her research was focused on protein structure determination using X-ray crystallography. She organized research seminars and taught laboratory techniques (in the field of Molecular Biology and Protein Chemistry) to undergraduate and graduate students at UC Irvine. Her research is published in many research journals as well as in books, “The Handbook of Metalloproteins” and “Annexins-Biological Importance and Annexin-Related Pathologies”. At Vanguard University, she teaches mainly General Chemistry.

Dr. Rosengarth teaches: Chem 112/L and Chem 121/L.


Sophia Smeragliuolo

sophiasmeragliuolo@vanguard.edu; (714) 619-6461; Laboratory Manager; B.S. in Chemistry

Sharon Fissette

sfissette@vanguard.edu; (714) 619-6460; Administrative Manager