Leadership Team

A solid company with a 20 year history with strong leadership and a clear direction for success with dedicated employees that can implement and execute the plan.

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The InterHealth Leadership Team

The InterHealth team is dedicated to meeting its customer’s needs and building long-term relationships. It consists of highly skilled professionals trained to manage a complex business model.


Paul Dijkstra

Chief Executive Officer

Paul Dijkstra joined InterHealth in September of 2005 as Executive Vice President and was promoted to CEO in January of 2007. Paul leads both the domestic and international sales and marketing teams and is charged with the responsibility of corporate planning and development along with the management of day-to-day operations of the company. A veteran in the healthcare industry, his talents and wealth of experience are valuable assets to InterHealth.  Paul received his MBA from the University of Groningen in the Netherlands.

Contact Team Member Paul Dijkstra

Mary Helen Lucero

Chief Financial Officer

A member of the InterHealth team since 1995, Mary Helen Lucero is responsible for management of the company’s financial operations, investor relations and human resources, as well as customer service and facility operations. She has been instrumental in the company’s growth and profitability.  She holds a Bachelor of Science degree in accounting from California State Polytechnic University, Pomona.

Contact Team Member Mary Helen Lucero

Patrick S. McCullough

Senior Vice President of Sales

Patrick McCullough joined the InterHealth team in 2014. He is responsible for the sales department, including strategic direction and management of key initiatives. Patrick comes to InterHealth with more than 20 years of senior sales management experience with industry leaders that include Leiner Health Products, Rexall Sundown, Natrol and Corr-Jensen. His expertise includes new channel development, strategic planning and executive sales. Patrick has a bachelor's degree in Marketing from Indiana University of Pennsylvania.

Contact Team Member Patrick S. McCullough

Robert Worsena

Vice President of Sales -North America


Rob Worsena joined InterHealth in May 2007 with more than 20 years’ experience in the nutritional supplement, food, beverage and consumer healthcare industries. He oversees the sales force for the USA. Prior to joining InterHealth, Mr. Worsena held several sales management and strategic marketing positions with Perrigo Company, where he helped to direct the sales, new product growth and customer marketing of an extensive line of nutritional supplements, functional foods, beverages and consumer healthcare products.  He holds a Bachelor of Science degree in Communications from Florida State University.

Contact Team Member Robert Worsena

Jay Martin

Vice President of International Sales

Jay Martin joined InterHealth in 1997. Jay is responsible for all sales in North and South America, Latin America and Asia (excluding Japan). Jay brings strong marketing and sales background to the International team with focus on strategy, planning, tactical execution and forecasting. Jay has held strategic marketing positions with Merck, Abbott Labs, Kelloggs and Pharmavite. He received has MBA from University of Southern California.

Contact Team Member Jay Martin

Jim Lugo, Ph.D.

Vice President, Business Development and Research

Dr. Lugo joined the InterHealth team in 2011. He is responsible for the Business Development and Research departments. His responsibilities include the oversight of the Company's R&D activities as well as its new business ventures. Dr. Lugo comes to InterHealth with more than 15 years of marketing and business development experience in the pharmaceutical industry with leading companies such as Chugai Pharmaceuticals, Dey LP, Elan Pharmaceuticals, Chiesi Farmaceutici, Sp. A., and UCB. His expertise includes product development from concept through launch, new business development, clinical trial design and medical marketing, as well as brand and general marketing management. Dr. Lugo has a bachelor's degree in Chemistry from Brooklyn College, a Ph.D. in Immunology from MIT, and an MBA from the University of California (Los Angeles).

Contact Team Member Jim Lugo, Ph.D.

Navpreet Singh, Ph. D., MBA

Vice President of Operations

Navpreet Singh, Ph. D., MBA joined InterHealth on May 2014. Navpreet is responsible for operations, warehousing, distribution, QA & QC functions and technical product support. Navpreet has extensive experience in process engineering from development to scale-up and optimization, raw material procurement and qualification, analytical method development, and management of product profiles from product stability to specifications, through labeling and packaging. In addition, he has extensive international work experience in France, India, Ireland, Italy, Mexico, Netherlands, Singapore, and Taiwan. Navpreet received his Ph.D. in Food & Bioprocess Engineering from the University of Illinois and his MBA from Indiana Wesleyan University.

Contact Team Member Navpreet Singh, Ph. D., MBA

Fredrick Zilz

Vice President of Information Technologies

Part of the InterHealth team since 1995, Fred Zilz has headed the company’s IT department since 2000 and prior to that was director of sales for the Western Region. Before joining InterHealth, Fred served as technical sales manager for Lucas Meyer, Inc. in Illinois. He holds a Bachelor of Science degree in genetics and development for the University of Illinois in Urbana-Champaign.

Contact Team Member Fredrick Zilz

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