About Call Schduler by Adjuvant


Our mission is to develop and market on call scheduling software solutions for critical scheduling challenges in healthcare environments. We provide online tools and technology to help ensure availability of the right provider, in the right place, at the right time.

  • We value our clients and provide unparalleled client service before, during and after implementation.
  • We value our employees; they are motivated and effective people empowered by leaders with passion, character and talent.
  • We value our products; our clients drive product development that meet market demands and exceed expectations for quality.
  • We value our extended team, our customers, partners, vendors and advisors who share our vision and value the services we provide.


Leadership Team

Patrick Zook

Founder and Medical Director, Patrick Zook, M.D.

Retired as of November 2017.  Has been a practicing family physician in St. Cloud, MN for the past 31 years at the St. Cloud Medical Group – a primary care, independent multi-specialty group with 55 physicians. His medical degree and residency training were at Creighton University in Omaha, NE.

Previously, Dr, Zook served as Chief of Staff at the St. Cloud Hospital, Minnesota Academy of Family Practice (MAFP) Foundation committee member and chair, as well as a Board of Trustees member for the Minnesota Medical Association (MMA), the Board of Directors for the Stearns-Benton County Medical Society, and a Legislative Committee of the MMA. In 2017 Dr. Zook is the current president of the Stearns Benton Medical Society and the MMA Foundation Board.

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President & CEO, Justin Wampach

graduated with a BS from St. Cloud State University. He has leadership experience as the Campus Information System Director at St. Cloud State University and the Director of Digital Media with EDTECH. Justin was the Co-founder and President of Digital Green, a company he helped build from $0 to $7M in sales with over 100 employees in two states.

He currently serves as a Board Member at Great River Federal Credit Union.  Past Board appointments include Chairman of Kids Fighting Hunger (formerly Kids Against Hunger of Central MN),  St. Cloud State University Department of Communication Studies Advisory Board and as Past President of the Minnesota Chapter of Healthcare Information Management Systems Society (MN-HIMSS).

Justin’s passions include Community Mediation, The United Way of Central Minnesota, Phi Kappa Tau Fraternity, The Rotary club of St. Cloud and The Message Program.

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Vice President Sales, Pat Elmes

has 20 years of experience in enterprise healthcare software sales and leadership. He joined Call-Scheduler from Spok, where he was an Enterprise Sales Director.

Prior to Call-Scheduler, he had many roles at Spok including Enterprise Sales Director, Regional Sales Manager, Channel Manager and Inside Sales Team leading new & existing business development efforts in the United States and Canada. He also participated in the Regional Vice President Leadership Program.

Elmes enjoys all the wonderful things that Minnesota has to offer from golfing to ice fishing. He holds a Bachelor of Science degree in finance from Minnesota State University Moorhead.

Amy Engebretson

Vice President Training and Support, Amy Engebretson

graduated with a BS in Bio-Medical Science, a BS in Medical Technology and a minor in Aviation from St. Cloud State University. She is a certified Medical Technician with four years of medical lab experience. Amy has an AA in Commercial Art and Graphic Arts from St. Cloud Tech College and was self employed for five years as a marketing designer.

She has ten years of project management, marketing, and design/layout for print and web projects. She has been with Adjuvant since 2001 and was the interim Director for 2 years, in addition to Product Management, Customer Service, Training and Support.

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Customer Success Manager, Gina Loxtercamp

discovered her passion for the healthcare industry while volunteering at St. Cloud Hospital.  As she pursued a BS at St. Cloud State University, her volunteering expanded into employment within Imaging Services and the St. Cloud Hospital Laboratory. Gina soon joined the competitive environment of Glaxo Wellcome, (now GSK), where clients appreciated her gracious, polite, and respectful manner. Gina genuinely enjoys learning about others, serving their needs, and finding solutions that improve life.

In addition to professional interests, she cherishes time with family. Gina serves on the board of the Unity School Foundation, an organization dedicated to the preservation and restoration of the 1895 rural schoolhouse. She is also an active member of the Northern MN Draft Horse Association, which strives to preserve draft horse heritage and antique (horse-drawn) farm equipment. Gina is also involved with her family in many aspects of farm and fieldwork on her parents’ farm – and seeks every opportunity to ride her Shire draft horse through the farm’s woods and fields!

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Customer Success Manager, Denise Mason

Graduated with a BS in accounting from St. Catherine’s University with a minor in economics.  She has spent the last 20 years running her own company helping clients with accounting, finance and office functions.  She has a wide range of experience from training in accounting software, data analysis and helping clients understand and use computer software.  Her goal is to help people do their jobeasier by teaching them how to use tools available to them – like Call Scheduler! 

Out of the office Denise enjoys golfing, time in the kitchen trying new recipes, finding new restaurants and exploring events around town. 

Chris R. Kudrna

Business Advisor, Chris R. Kudrna

has an MBA in Finance from the University of Chicago and a BA, magna cum laude, in Economics from Macalester College. He has also been a college instructor and has served on the board of a start-up expert systems computer company. Chris is an Emerging Companies Forum program coordinator for the Anderson Center. Chris also serves on the Boards of St. Cloud Windows, a custom manufacturer of commercial windows and KEEPRS, a high quality supplier of uniforms and equipment to law enforcement and other agencies. He is also the board chair for the Sustainable Farming Association of Minnesota and Treasurer for Renewing The Countryside.

Prior to starting his own consulting business in 1994, Chris led a variety of line and staff organizations at American Express Financial Advisors (formerly IDS Financial Services and now called Ameriprise) from 1981 through 1994. In 1987 he became a Vice President and joined the board for IDS Life, American Express Financial Advisors’ largest and most profitable subsidiary. In addition to his thirteen years at American Express Financial Advisors, Chris has worked for a large manufacturer in Milwaukee and a wholesaler of financial services to banks in Boston.


Call Scheduler by Adjuvant has deeply seeded roots in Central Minnesota. While Call Scheduler by Adjuvant supports many local organizations that help raise healthy kids to become good members of our community, we hold a special place in our hearts for The United Way of Central Minnesota, Kids Fighting Hunger and St. Cloud School District 742.