IPFSYM - Key Persons


Al Berg

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Operations Details

Amber Ramirez Sr.

Job Titles:
  • Senior Human Resources Generalist
  • HR Generalist Details
Amber Ramirez is the Senior Human Resources Generalist for Simulations Plus. She has a variety of human resources experiences across different industries. Amber brings 15 years of experience in several different areas of Human Resources including talent acquisition, compensation, benefits, and employee relations.

Amparo de la Peña

Job Titles:
  • Member of the Senior Leadership Team
  • Vice President, Pharmacometric Services
  • VP, Pharmacometric Services Details
Dr. Amparo de la Peña is a native of Montevideo, Uruguay, where she graduated as a Pharmaceutical Chemist from the University of the Republic; and then earned a Ph.D. in Pharmaceutics (2000) from the University of Florida. Amparo has over 21 years of experience in the pharmaceutical industry, both as a PK/PD scientist and as an Asset Manager. She has led cross-functional teams in diverse therapeutic areas (including diabetes, neuroscience, oncology and COVID-19) to design, optimize and implement integrated development plans for internal and external partners. As a scientist, her strategic pharmacometric approaches have supported global drug development from the early stages to regulatory approval and post-marketing. Dr. de la Peña has published extensively in peer-reviewed journals in several languages and presented at scientific conferences worldwide. One of her passions is to mentor and develop diverse people, and to foster inclusion. Besides work, Amparo divides her time between her family, and her involvement in scientific and community organizations as a volunteer, peer reviewer, or Board member.

Anant Ketkar

Job Titles:
  • Scientific Lead / Simulations Plus, Inc.
  • Scientific Lead Details
Anant Ketkar joined the Simulation Studies Team in April 2022 as a Principal Scientist taking on the role of Scientific Lead - India. He is involved in the application of PBPK/PBBM modeling and simulation to meet the objectives of various client projects. He also provides scientific input both in terms of software applications and project proposals to the Indian distributor to support their marketing and sales efforts. Anant, in partnership with our Indian distributor, Electrolab, supports Simulations Plus' many customers in India and serves as a thought leader to increase awareness and adoption of PBBM/PBPK modeling throughout the country. He also delivers modeling and simulation projects to address client objectives and inform regulatory interactions. Anant earned his doctorate in Pharmaceutical Sciences from Poona College of Pharmacy (Bharati Vidyapeeth Deemed University), Pune, India. He carries 20 years of experience in formulation research, including 6+ years of experience in PBPK/PBBM modeling and biorelevant dissolution method development for modified complex generics and enabled formulations for poorly soluble NCEs. Prior to joining Simulations Plus, Anant was Head of Technical Services at IQGEN-X Pharma, where he led a team of formulation team leaders and scientists for development of solid and liquid orals, and injectables for the global market. Prior to that he worked in positions of increasing seniority with pharmaceutical research companies, including Bioved Pharmaceuticals Inc., Ranbaxy (now Sun Pharma), Pfizer Animal Health (now Zoetis), Sandoz and Sun Pharma Advanced Research Company (SPARC). Besides his professional work, Anant enjoys singing Bollywood songs and participates in live musical events and concerts in Mumbai and nearby areas. He is also passionate about learning portrait and street photography. Anant's Patent Applications include:

Andrew Mueller

Job Titles:
  • Dir., Business Development Details
  • Director, Business Development / Simulations Plus, Inc.
Andrew Mueller has approximately 17 years' experience in the pharmaceutical development industry. He joined Simulations Plus in 2020 as a Project Coordinator, Technical Writer, and Coordinator for Learning Services and now serves as a Director for Business Development. Prior to his employment with Simulations Plus, Andrew spent the majority of his career with Covance Laboratories (LabCorp) in Toxicology, as a Lead Scientist in Bioanalytical Chemistry, and as a Pharmacokineticist in Drug Metabolism.

Andrew Rokitka

Job Titles:
  • Vice President, Information Technology / Simulations Plus, Inc.
  • VP, IT Details
Andrew is the Vice President of Information Technology and is responsible for guiding Simulations Plus' IT and cybersecurity strategy, maintaining regulatory compliance, and ensuring the integrity and availability of our data and systems. Andrew's team is focused on the continuous optimization of our analysis and software development platforms, as well as the exploration of emerging technologies to provide better security, faster results, and a more seamless work experience for our employees who reside throughout the world. Andrew joined Cognigen in 2001 as a Systems Administrator and had been managing Cognigen's IT department since 2007. During his tenure, Andrew has led the company through two successful data center relocations, supported the merger of DILIsym and Cognigen into Simulations Plus, and facilitated the company's transition to a largely remote workforce. Additionally, Andrew is one of the co-creators of the KIWI system - a web-based platform that allows our pharmacometricians to perform their analyses with much greater efficiency.

Asanka Wickramasinghe

Job Titles:
  • Programmer
  • Programmer Details
Asanka has been working as a programmer and engineer for the last decade and currently serves as the main User Interface developer for GastroPlus® (version 10.0 or GPX). He specializes in C++, Javascript and python languages. He graduated from University of Moratuwa, Sri Lanka and completed his Master of Engineering at University of Western Ontario Canada.

Becky Graves

Job Titles:
  • Assoc. Dir., Sim. Studies Team Details
  • Associate Director of the Simulations Studies Team
  • Associate Director, Simulations Studies Team
Becky Graves is the Associate Director of the Simulations Studies Team at Simulations Plus where she works on consulting projects alongside mentoring scientists, providing mechanistic absorption and physiology-based pharmacokinetic (PBPK) models for the pharmaceutical industry. She uses her 10+ years of modelling experience to develop mechanistic models in various pre-clinical species and human populations, and to apply these to guide drug development at various stages of pre-clinical and clinical development. Prior to joining Simulations Plus she worked at GlaxoSmithKline in positions of increasing seniority within Drug Metabolism and Pharmacokinetics (DMPK), progressing from bioanalytical work, through designing DMPK studies to providing the strategy for various drug discovery projects. Finally, Becky moved into a team dedicated to providing end-to-end mechanistic modelling for drug discovery and development, including predicting efficacious human doses prior to First Time in Human studies and supporting drug product development with physiologically based biopharmaceutics modelling (PBBM). Besides her professional work and family, Becky enjoys playing field hockey and spending time in the great outdoors.

Bill van Osdol Sr.

Job Titles:
  • Principal Scientist Details

Brandon Rodriguez

Job Titles:
  • Project Mgr

Brett Howell

Job Titles:
  • Member of the Executive Management Team
  • President Details

Bud Nelson

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Corp. Cnsl. & PDPO Details

Celeste Vallejo

Job Titles:
  • Scientist II Details

Chirag Desai

Job Titles:
  • Asst. Corp. Controller Details

Christian Bond

Job Titles:
  • Systems Admin. I Details

Claire Mo

Job Titles:
  • Accounting Ops. Mgr. Details

Daniel Hoeft

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Corporate Controller Details

Daniel J. O'Connor

Job Titles:
  • Dir., Business Dev. Details

Daniel Weiner

Job Titles:
  • Member of the Simulations Plus Scientific Advisory Board
  • Adjunct Professor Details

Daniela Amaral Silva

Job Titles:
  • Scientist I Details

David Miller

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Cheminformatics Details

Dechuan Zhuang

Job Titles:
  • Principal Scientist Details

Denise N. Morris

Job Titles:
  • Dir., Learning Services Details
  • Director of Learning Services
Denise Morris transitioned to Director of Learning Services at Simulations Plus in April of 2021. Prior to this, she served as a Director of  Quantitative  Pharmacology at Cognigen, Senior Quantitative Pharmacologist at Gilead Sciences, Associate Director of Quantitative Pharmacology at Cognigen, and as a Staff Scientist in Pharmacokinetics at Covance. Dr. Morris has over 10 years of experience in clinical pharmacology. Her current focus is leveraging her extensive knowledge in modeling and simulation to assist in physiologically based pharmacokinetic training. She has co-authored many publications in peer-reviewed journals and has presented abstracts and posters at national meetings on topics relating to these areas. Dr. Morris has a Ph.D. in Pharmacy (Clinical Pharmaceutical Sciences) from the University of Iowa and a Bachelor of Science in Biochemistry and Molecular Biology from the University of Miami. She is a member of both the American Society for Clinical Pharmacology & Therapeutics and the International Society of Pharmacometrics.

Diwas Sapkota

Job Titles:
  • Mkt. Res. Analyst Details

Eric Jamois

Job Titles:
  • Dir., Business Dev. Details

Farah Al Qaraghuli

Job Titles:
  • Scientist II Details

Georgy Hartmann

Job Titles:
  • Principal Scientist Details

Grace Fraczkiewicz

Job Titles:
  • Exec. Dir., Sim. Studies Details

Haiying Zhou

Job Titles:
  • Dir. of Sim. Technologies Details

Hugh Barton

Job Titles:
  • Member of the Simulations Plus Scientific Advisory Board
  • Adjunct Professor Details

Jacqueline Maya

Job Titles:
  • Project Mgr

James Mullin Sr.

Job Titles:
  • Principal Scientist Details

James Polli

Job Titles:
  • Member of the Simulations Plus Scientific Advisory Board
  • Professor Details

Jasmin Nevarez

Job Titles:
  • Digital Content Creator Details

Jasmina Novakovic

Job Titles:
  • Principal Scientist Details

Jeffrey Dahlen Sr.

Job Titles:
  • Staff Engineer, Operations Details

Jennifer Dilts

Job Titles:
  • Operations Specialist Details

Jennifer Presnell Sr.

Job Titles:
  • Accountant Details

Jessica Spires Sr.

Job Titles:
  • Scientist II Details

Jill Fiedler-Kelly

Job Titles:
  • Member of the Executive Management Team
  • President Details
Jill Fiedler-Kelly awarded with ISoP Fellowship for her professional excellence and superior impact in pharmacometrics, and for substantial volunteering work for ISoP on October, 2016.

John A. DiBella

Job Titles:
  • Member of the Executive Management Team
  • President Details

John K. Paglia

Job Titles:
  • Professor Details

Jonathan Chauvin

Job Titles:
  • Member of the Executive Management Team
  • President Details

Josh Fohey

Job Titles:
  • Member of the Executive Management Team
  • VP, Business Dev. Details

Joshua Stangl

Job Titles:
  • Project Coord. / CRM Admin

Joyce Macwan Sr.

Job Titles:
  • Scientist II Details

Julie Cook

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Biz. Integration & Transformation Details

Kevin Cooper Sr.

Job Titles:
  • Computer Scientist Details

Lindsay Luke

Job Titles:
  • Member of the Senior Leadership Team
  • Exec. Dir., HR Details

Lisa Behr

Job Titles:
  • Dir., Operations Details

Lisa LaVange

Job Titles:
  • Professor Details

Luann Phillips

Job Titles:
  • Distinguished Scientist of Pharmacometrics
Luann Phillips has 29 years of experience in population PK and PK/PD modeling. She has been a population PK/PD scientist at Cognigen for 25 years, where she is currently a Distinguished Scientist of Pharmacometrics. Prior to her work at Cognigen, Ms. Phillips was a research assistant in the Clinical Pharmacokinetics/Dynamics Department at Burroughs Wellcome Company. Ms. Phillips has a master of science degree in biomathematics from North Carolina State University in Raleigh and a bachelor of arts degree in mathematics from Hendrix College in Conway, Arkansas. She has co-authored and contributed scientific expertise for many research papers, posters, and presentations. She has assisted with the development and instruction of basic NONMEM courses and has developed advanced NONMEM training materials. Ms. Phillips has also given a guest lecture on the methodology of covariate analyses at AAPS which later served as reference material in the book "Pharmacokinetic-Pharmacodynamic Modeling and Simulation" written by Peter Bonate.

Manas Shah Sr.

Job Titles:
  • Scientist II Details

Marin Gomez

Job Titles:
  • Systems Admin. I Details

Matthew Hunt

Job Titles:
  • Project Mgr

Maxime LeMerdy Sr.

Job Titles:
  • Scientist Details

Michael Lawless Sr.

Job Titles:
  • Principal Scientist Details

Nate Musser

Job Titles:
  • Dir. of Alliance Mgmt. Details

Neil Miller

Job Titles:
  • Member of the Senior Leadership Team
  • VP, Simulation Sciences Details

Noam Morningstar-Kywi

Job Titles:
  • Scientist I Details

Ola Mikosz Sr.

Job Titles:
  • QM Scientist Details

Pankaj Daga

Job Titles:
  • Principal Scientist Details

Paul B. Watkins

Job Titles:
  • Professor
  • Professor of Pharmacy
Paul B. Watkins, M.D., is a professor of pharmacy, medicine, and public health at The University of North Carolina at Chapel Hill (UNC), and the director of the UNC Eshelman School of Pharmacy Institute for Drug Safety Science (IDSS) since its formation in 2009. He serves as chairman of the Board of Directors for DILIsym Services, Inc., a company creating and using DILIsym software to improve the development of safer drug therapies, and director of The DILI-sim Initiative, a public-private partnership consisting of major life science companies charged with developing the DILIsym software. As an internationally recognized expert in drug safety and a clinically trained hepatologist, Dr. Watkins has extensive research experience in drug-induced liver injury (DILI), which includes basic investigation in drug metabolism and transport, clinical studies, causation assessment, and regulatory affairs. He has been continuously funded for over 30 years by the National Institutes of Health for basic and translational research, and he is one of the most frequently cited authors in the field of pharmacology. He is chair of the steering and genetics committees for the U.S. Drug-Induced Liver Injury Network supported by the National Institutes of Health. Dr. Watkins is the recipient of numerous awards including the 2018 Toxicology Career Award from the American Society of Pharmacology and Experimental Therapeutics (ASPET), a MERIT award from the National Institutes of Health, the 2014 Agilent Thought Leader Award, and the 2015 Rawls-Palmer Innovation in Medicine Award; he has been elected to several honorary societies including the Association of American Professors (AAP). He has served on many advisory boards, including almost a decade on the GlaxoSmithKline Scientific Advisory Board. Prior to serving as director of the IDSS, Dr. Watkins was director of the UNC Translational and Clinical Sciences (TrACS) Institute and principal investigator on the university's $60 M Clinical and Translational Science Award (CTSA) supported by the National Institutes of Health. His academic career started at the University of Michigan where he became Professor of Medicine and Professor of Pharmacology and director of the General Clinical Research Center.

Priyata Kalra Sr.

Job Titles:
  • Scientist Details

Revathi Chapa

Job Titles:
  • Scientist II Details

Robert Fraczkiewicz

Job Titles:
  • Research Fellow Details

Rodrigo Cristofoletti

Job Titles:
  • Member of the Simulations Plus Scientific Advisory Board
  • Assistant Professor Details

Rose Rios

Job Titles:
  • Assistant Details

Saima Subhani Postdoc

Job Titles:
  • Fellow Details

Sandra Suarez-Sharp

Job Titles:
  • VP, Regulatory Affairs Details

Scott Q. Siler

Job Titles:
  • CSO Details

Sharlene Evans

Job Titles:
  • Member of the Board of Directors
  • Chief People Officer / Myrtle Consulting Group
  • Chief People Officer Details
Ms. Evans has a proven track record in executing large-scale improvement projects across complex, multi-site organizations for Fortune 500 clients. She is an experienced practice leader driving business development, people management and development, and methodology and collateral stewardship. Ms. Evans most recently served as the Chief People Officer at Myrtle Consulting Group, a change management and sustainability consulting firm that is now part of Accenture. At Myrtle, she was responsible for the internal people processes to support Myrtle employees, and she also led the team responsible for the development and delivery of the people and organization capabilities and service offerings that are provided to Myrtle clients. Immediately prior to joining Myrtle, she was the Vice President of People and Organization at SSA & Company. Prior consulting experience also includes Hitachi Consulting, Celerant Consulting, and Ernst & Young Consulting. Sharlene earned a bachelor's degree in Industrial Engineering from Auburn University and a Master's degree in Industrial Engineering from Purdue University.. Sharlene Evans was appointed on November, 2021 as a Board of Director.

Shawn M. O'Connor

Job Titles:
  • Member of the Executive Management Team
  • CEO Details
Shawn M. O'Connor appointed as Chief Executive Officer(CEO) effective from June 26, 2018. Learn More

Suriya Arulselvan Sr.

Job Titles:
  • Scientist Details

Suvarchala Avvari

Job Titles:
  • Scientist II Details

Tanya Marvin

Job Titles:
  • Corp. Mkt. Coordinator

Tarang Vora Sr.

Job Titles:
  • Scientist Details

Victor R. Aguilar

Job Titles:
  • Creative Lead Details

Victor Reyes

Job Titles:
  • Marketing Coordinator Details

Viera Lukacova

Job Titles:
  • Member of the Senior Leadership Team
  • CSO Details

Walter S. Woltosz

Job Titles:
  • Member of the Board of Directors
  • Chairman Details

Will Frederick

Job Titles:
  • Member of the Executive Management Team
  • CFO Details

William Jusko

Job Titles:
  • Member of the Simulations Plus Scientific Advisory Board
  • Professor Details

Xavier Pepin

Job Titles:
  • Associate VP, Regulatory Affairs Details

Yu-Nien (Tom) Sun

Job Titles:
  • VP, Strategic Consulting Services Details