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Meet Our MPAcc Faculty


A portrait of Sheri Betzer.

Sheri Betzer

Course(s) taught: ACCM 5650

Sheri Betzer is a CPA and CFE from Denver, CO. Since receiving her B.S. in Accounting from Colorado Mesa University, she has become one of the foremost experts in fraud & forensic accounting. She regularly conducts continuing education courses for CPA's and attorneys while maintaining a practice that involves litigation support, fraud investigation, & financial consulting. Former clients include the US Dept. of Justice, the CO Dept. of Revenue, & public defender offices throughout CO, AZ, & WY.
A portrait of Greg Clifton.

Greg Clifton

Course(s) taught: ACCM 6140

Gregory Clifton is a tenured Associate Professor of Accounting and earned his law degree (JD) at Thomas M. Cooley Law School and an LLM in Taxation from the University of Denver. He is licensed to practice law in the state and federal courts of Colorado and Georgia. He has also practiced in the US Tax Court and the United States Court of Appeals for the Tenth Circuit. Greg continues to operate a small private practice advising small businesses and individuals on tax matters.
A portrait of Joe Giordano.

Joe Giordano

Course(s) taught: ACCM 5020

Joe has two Master's degrees from the University of Colorado Denver and is a PhD student at the University of Denver. He is a long time Certified Internal Auditor (CIA), holds a Certification in Risk Management Assurance (CRMA), and is a Certified Public Accountant (CPA). His research interests are in auditing, internal auditing, cost accounting, and small business issues.
A portrait of Viktor Kiss.

Viktor Kiss

Course(s) taught: ACCM 5220

Viktor Kiss primarily teaches quantitative courses, ranging from Business Statistics through Operations Research to more advanced Data Mining courses. He lectures on both the BS and MBA level. He publishes in the area of modelling complex systems. Viktor has a Ph.D. in Business Administration from the University of Pécs and a Master’s degree in Finance and a B.B.A. degree from Middlesex University in collaboration with the University of Pécs.
A portrait of Tony Lopez.

Tony Lopez

Course(s) taught: ACCM 5000

Tony is a retired Big 4 Partner with 32 years of experience in accounting, auditing, Securities & Exchange Commission (SEC) & forensic matters. He has held senior positions at the Financial Accounting Standards Board (FASB), Public Company Accounting Oversight Board (PCAOB) & the SEC. He participated in drafting accounting & auditing standards at the FASB & PCAOB, & interpreted accounting & auditing standards at the SEC, informally referred to as the 'Supreme Court of Accounting and Auditing.'
A portrait of William Mesa.

William Mesa

Course(s) taught: ACCM 5100

Dr. Mesa received his Bachelors and Masters in Accounting from New Mexico State University and his Doctorate in Management at Colorado Technical University. His primary areas of teaching are in accounting, strategic analytics and ethics. Dr. Mesa is the principal and founder of Triangulation Group, LLC where he serves as a consultant for SMEs in the capacity of vision, strategy, and core values planning in conjunction with analytics.
A portrait of Minga Negash.

Minga Negash

Course(s) taught: ACCM 6580

Dr. Negash teaches a variety of accounting courses. His intellectual contributions were published in highly rated journals. He serves the University of the Witwatersrand as a Visiting Professor. Negash is a recipient of a national award from the Southern African Accounting Association & the Dean’s Award for Excellence in Scholarship. He is a member of the American Accounting Association, serves on editorial boards of journals & advises the Ministry of Science and Higher Education of Ethiopia.
A portrait of Letitia Pleis.

Letitia Pleis

Course(s) taught: ACCM 5400 & ACCM 5810

Dr. Pleis has a Ph.D. in Accounting. She is focused on Cost Accounting and is Certified in Strategy and Competitive Analysis. Current research interest involves cost management and strategy within small businesses. She is active within the profession focusing much of her time with the Institute of Management Accountants and is a great resource for students wanting to know more about the Certified Management Accountant certification.
A portrait of Salina Siddique.

Salina Siddique

Course(s) taught: ACCM 5050

Professor Salina Siddique earned her Ph.D. in 2016 from Victoria University in Melbourne, Australia in 2016, where she taught for 10 years. She is from Melbourne, where she got her MS in Accounting in Central Queensland University. Dr. Siddique has published research in journals such as Business Strategy and the Environment, Assessment & Evaluation in Higher Education, International Review of Business Research Papers, and Australasian Accounting, Business and Finance Journal.
A portrait of Shawn Tebben.

Shawn Tebben

Course(s) taught: ACCM 5901

Shawn has over 30+ years of accounting experience—PwC partner, VP of Internal Audit at two large global public companies, Managing Director at Protiviti, VP of Financial Aid Operations & owner of a consulting business. She brings experience in leadership, accounting & auditing, risk management, compliance, program management & process improvement to help students connect theory and concepts. As a lifelong learner, she is excited to bring real-world experiences to life for her students.
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