Visionary Leaders

Steven St. Peter, M.D.

President and Chief Executive Officer

Steven St. Peter, M.D. is one of our founders and currently serves as the President and CEO of Aratana Therapeutics. Formerly an Assistant Clinical Professor of Medicine at Columbia University, Dr. St. Peter received a Doctor of Medicine degree from Washington University, and completed his residency and fellowship at the Hospital of the University of Pennsylvania. He also holds an MBA from the Wharton School of the University of Pennsylvania and a B.A. degree in Chemistry from the University of Kansas. Dr. St. Peter was a Managing Director at MPM Asset Management Company LLC, where he served as Chairman of Aratana Therapeutics, combining his considerable years of experience within both the pharmaceutical and medical technology industries.

Craig Tooman, MBA

Chief Financial Officer

Craig Tooman, MBA, is a seasoned pharmaceutical executive with more than 20 years of industry experience and currently serves as Chief Financial Officer and Treasurer for Aratana Therapeutics. He is widely versed in international finance, sales, market research, business intelligence, corporate strategy, M&A and investor relations. Before joining the executive team, Mr. Tooman served as a Director and Chairman of Aratana’s Audit Committee, and served as a member of the Board of Directors. Mr. Tooman previously served as CEO of Avanzar Medical, Inc., a human oncology company; has held executive positions at large pharmaceutical companies, including Pharmacia and Upjohn; and served as the CFO of Enzon Pharmaceuticals and Ikaria. He has a B.A. in Economics from Kalamazoo College and MBA in Finance from the University of Chicago.

Brent Standridge

Chief Operating Officer

Brent Standridge brings 35 years of experience in animal health markets to his role as Chief Operating Officer at Aratana. Most recently, he consulted for the generic veterinary medicine maker Putney, Inc., which was acquired by Dechra Pharmaceuticals PLC. Previously, Standridge served as Senior Vice President of Sales and Marketing of North America at Wyeth’s animal health division, Fort Dodge Animal Health, for more than 10 years. At Fort Dodge, he was responsible for all sales and marketing activities, as well as management of more than 330 people and sales of $500 million in both veterinary and OTC channels. Mr. Standridge graduated from The Ohio State University with a B.S. in Animal Science.

Ernst Heinen, DVM, PhD

Chief Development Officer

Ernst Heinen, DVM, PhD, is the Chief Development Officer at Aratana Therapeutics. He is an R&D executive in the animal health industry with broad experience in turning innovative ideas into products for international markets. Before joining Aratana, Dr. Heinen had a 22-year career at Bayer Animal Health. As Vice President of R&D and Veterinary Technical Services, Companion Animals, he helped create innovative programs for several flagship products. Dr. Heinen is the author of dozens of scientific articles, abstracts and presentations and currently serves on the Kansas State University Olathe Advisory Board. He received his veterinary degree and a D.V.M. degree in veterinary microbiology from the Justus-Liebig-University of Giessen Veterinary School in Giessen, Germany and is a certified specialist in veterinary microbiology.

John Ayres

General Counsel & Secretary

John Ayres, is General Counsel and Secretary of Aratana Therapeutics with more than a decade of experience representing pharmaceutical, medical device, and technology companies. Before joining Aratana, he served as corporate and securities counsel for California-based Amgen Inc., the world’s largest independent biotechnology company. Prior to joining Amgen, he was an associate at Latham & Watkins LLP in Chicago, where he specialized in public company representation and corporate transactions. Mr. Ayres earned his Juris Doctorate degree from the University of Missouri. He also earned a B.A. degree in finance from Truman State University. He is a member of the Bar of the state of Missouri and the state of Illinois.

Jeff Jones, Ph.D.

Vice President of Business Development

Jeff Jones, PhD, is the Vice President of Business Development and joined Aratana from PharmAthene where he held positions in business development and most recently served as Chief Operating Officer. Prior to PharmAthene, Dr. Jones was a Principal at Emerging Technology Partners, LLC, a life sciences focused venture capital fund. Dr. Jones holds a Ph.D. in Cell and Molecular Biology from Baylor College of Medicine, an MBA from Cornell’s Johnson Graduate School of Management and a B.A. in Biology from the University of Virginia.


Debbie Walls

Vice President of Human Resources

As Vice President of Human Resources, Debra Walls, M.B.A., brings more than 20 years of experience from a wide variety of industries, including automotive, aerospace, technology and animal health. Before joining Aratana, Ms. Walls served as Director of Human Resources for Fishnet Security where she was a member of the executive team and lead a team of a dozen supporting the organization’s overall HR strategy. Prior, she worked for seven years at Wyeth’s Fort Dodge Animal Health and was responsible for the division’s compensation and benefits programs and also lead the transition of employees after the Pfizer acquisition. Ms. Walls holds her Masters of Business Administration from the Williams College of Business at Xavier University and a B.S. in organizational leadership from Purdue University.

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