Retalon Leadership Team

Vision without action is merely a dream. Action without vision just passes the time. Vision with action can change the world. - Joel A. Barker

Mark Krupnik, PhD

Co-Founder, CEO

Learn about Mark

Mark brings over two decades of leadership experience in building and delivering state-of-the-art solutions for retailers. Prior to Retalon, Mark has consulted over 30 large retailers across North America & Europe in implementing advanced forecasting & replenishment systems, and authored new programs in Retail Technologies and Retail Information Systems for the School of Retail Management at Ryerson University.


Mark has written 13 published scientific articles and has been a speaker at over 15 international conferences. In 2002 drawing on strong mathematical background and retail technology experience he co-founded Retalon to implement his vision of an advanced Predictive Analytics solution for retail.

Joseph Sheinis, PhD

Co-Founder, CTO

Learn about Joseph

Joseph obtained a Ph.D. in Operations Research in 1991. Joseph’s Post Doctoral project was on the design of a new warehouse management system for a major retail organization. Joseph is a Professional Engineer (designation in 1997) and a SUN Microsystems Certified Enterprise Java architect.


He has 3 patents in Enterprise Java Applications Architecture and 9 published scientific articles. Joseph has more than 20 years of experience of leadership in enterprise software development.

Jean-Philippe Vorsanger (JP)


Learn about JP

Jean-Philippe is an accomplished Technology Executive and Consultant with over 20 years of success in managing retail technology companies and assisting retail customers with Supply Chain planning and enterprise software selection and implementation.


Jean-Philippe manages Retalon operations and delivery processes to ensure effective delivery of our solutions to customers.  He holds a BSc. In Electrical Engineering and an MBA.

Mark Kalp

VP, Development

Learn about Mark

Mark has over 20 years of experience in user interface design & development, with more than 15 years in Retail specific environments. He is responsible for providing Retalon users with a rich experience, improving usability of Retalon products, and enhancing user satisfaction with the software. Mark has a Master’s degree in Engineering

James Gledhill

VP, Professional Services

Learn about James

James is an energetic change champion. He loves bringing people together to develop new and innovative approaches to solving problems. James has excelled in business & project delivery leadership roles in the Retail & CPG space.


James ensures customer success through his Project Management (PMP), Continuous Improvement (Lean 6-sigma), and Change Management background. As a University of Toronto, Engineering Science graduate, James brings a diverse set of experiences & perspectives to the Retalon Profession Services organization.

Vlad Illinov

VP, Marketing

Learn about Vlad

Vlad is a retail entrepreneur turned marketing professional. Previously, he was the lead strategist at a top Canadian marketing agency. At Retalon, he oversees digital marketing campaigns across search, paid channels, and email.

Yana Tcharnaia 

VP, Sales

Learn about Yana

Yana Tcharnaia is responsible for leading the sales team and creating and executing sales strategies. Yana is passionate about understanding customer needs and finding solutions to help retailers grow their business.


Prior to Retalon, Yana spent her early career as a Director of Sales at Constellation Software, Canada’s largest software company.  Yana received her BA in Business Management from McMaster University.

Yan Krupnik

VP, Business Strategy

Learn about Yan

Yan Krupnik graduated from Ryerson University, majoring in Marketing Management. As VP of Marketing & Communications, Yan is responsible for developing and implementing multi-touch marketing programs that lead to brand exposure, increased product sales, as well as strategic partner relationships with media, retailers, researchers & consultants.

Zev Berkovich

Director, Integration & Analytics

Learn about Zev

Zev has extensive retail industry experience, with strong analytical and software development skills. He is responsible for bridging the gap between the technical and business side, bringing all teams successfully to the same goal.


Zev has worked on and overseen many successful integrations, and has worked with several dozen systems & environments to seamlessly integrate Retalon’s solutions. Zev graduated with High Honours from Seneca College at York University, and has won awards in several national mathematics contests.

David Wiest

Director, Product

Learn about David

David has over 25 years experience working at all levels of retail with major 1,000+ store chains. From Sales & Store Operations, Purchasing, Store Replenishment & Allocation, Store Design & Construction, to managing the Franchise division he has excelled at all.


This broad experience has given David a well balanced experience that touches on all sides of the retail process. Winning multiple awards for excellence throughout his career David has been responsible for significant gains in sales, profit and productivity thanks to initiatives he’s implemented.

Mark Smyth

Director, Consulting

Learn about Mark

Mark graduated from Ryerson University in Applied Computer Science. He has over 20 years of partnering with customers to implement Retail solutions focused on Forecasting, Allocation, Replenishment and Planning.


He has become a trusted advisor to customers in multiple industries. He is responsible for leading implementations to ensure the customer optimizes the use of Retalon to suit their specific needs and business targets. Ensuring that customers get the best out of their Retalon investment is the main driving force to his success.

Carol Kohn

Director, Consulting

Learn about Carol

Carol has over 16 years’ experience in retail merchandise planning with top Canadian organizations, in  brick and mortar, and multi-channel environments.  She has worked with a variety of commodities spanning from apparel, home, cosmetics, and fine jewelry.  This experience has provided her with a broad knowledge and understanding of some of the various differences, and influences that would impact each unique business.


Carol is excited to build collaborative partnerships, with our Retalon customers to help design and implement solutions that work for their unique business needs, serving as a liaison between Retalon and its customers.

Amanda Vomacka

Director, Consulting

Learn about Amanda

Amanda has 18 years of retail industry experience. She spent the first ten years of her career in advanced analytical roles with tier 1 Apparel and Consumer Packaged Goods companies, followed by eight years with one of the largest global retailers where she worked in Buying, Merchandise Planning, and Planogram Planning.


She is responsible for partnering with customers to ensure successful software implementation. Amanda holds a Bachelor of Arts, Honours Business Administration from the Ivey Business School.

Speak With Our Expert Team!


Retalon’s team consistent of North America’s top experts and thought leaders in advanced analytics for retail.


We believe that retailers should be able to optimize and scale their business using AI without a PhD in data science. We specialize and innovate in the science behind retailing and supply chain optimization to provide retailers with easy to use solution that deliver powerful and reliable results.


Get in touch with our team to learn more about how retailers leverage advanced analytics and AI in their businesses.