Get To Know The

WillKate Team

agatha johnson willkate

Agatha 'Aggie' Johnson

CFP®, CPWA®

Agatha Johnson, known for being intuitive regarding people, is founder and owner of Will Kate, an organization focused on the purpose of your family wealth.

Aggie has years of experience working with clients who desire and value trusted expert wealth advice and advising them on how to be successful in life by finding the financial freedom to accomplish their purpose and dreams. She cares about each client’s personal success and takes the time to get to know the families and organizations she works with on a personal level. Aggie has worked with a wide range of clients, from families in business and high income earners, to medium-to-high net worth clients and ultra-net worth clients.

After decades working with individuals, families, and businesses, Aggie realized that most people focus on two specific areas of wealth planning, financial decisions and estate planning, which causes many to struggle with their choices. Aggie’s approach looks at the bigger picture; her expertise is in helping clients adapt to wealth, understand their relationship with wealth, and realize their purpose and vision. This creates the foundation for experiencing a greater opportunity to achieve dreams and lasting effects for different stages in life and future generations.

Agatha’s multi-disciplined approach provides guidance in six dimensions of wealth: financial, spiritual, human, family, structural (how things are owned and used) and societal. She helps clients define the opportunities they wish to create for themselves, family members, people, causes, and communities for which they care. Aggie has used this approach to work through many scenarios of opposing dynamics which can often times create complexities and complications. She believes having a strong path will provide the opportunity for lasting legacies.

Agatha is married to Craig, has four grown sons, three wonderful daughter-in-law’s and seven beautiful grandchildren.  When not working with her family of clients she can be found enjoying time with her family, traveling with her husband, hiking and giving back to the community.

justin aman

Justin Aman

Family Business Behavior and Culture Consultant

Justin brings a deeper understanding of our family clients by bringing his knowledge of the human thought process to the team and serves as family business behavioral specialist, wellbeing and culture consultant. Justin has been with WillKate since 2014; first as an Administrative Assistant, then advancing to Project Manager, and now in his current role using both behavior analysis and consulting. Justin holds a Bachelor’s of Psychology (South Dakota State, 2017) and a Master’s of Clinical Psychology (Emporia State University, 2021) with an emphasis on stress and coping. Justin supports the team by gathering and analyzing responses from inventories, interviews, and surveys to facilitate client personal growth as well as developing group and organizational dynamics. This information provides the ability to understand the impact a person’s environment, experiences, upbringing, and values have on their thought process both in the work environment and their personal life. Justin is also a part of a research team at the University of Minnesota investigating proteomics in Down Syndrome and Autism.  

Devon Braun

Devon J. Braun

Client Service Specialist

Devon is combining his passion for serving others and understanding their resources through specializing in client service for the WillKate team. After growing up in Spearfish, SD, Devon received his college degree from the University of South Dakota (Go ‘Yotes!) with a Bachelors in Economics and minors in Analytics and Psychology. During his junior year of college, he had an internship with a financial advisory firm, his first exposure to the financial services industry, but Devon hasn’t looked back since. After a brief stint back in Spearfish after college graduation, Devon and his wonderful bride, Madisyn, moved to Sioux Falls where Devon was able to begin his financial planning career with the WillKate team. Devon enjoys attempting to play golf, cooking tasty meals, drinking good coffee, aquariums, spending time outdoors, and going on evening walks with his wife and new puppy, Poppy.    

Somer Schimke

Somer Schimke

Client Services Manager

Somer supports the team and clients with facilitation of planning scheduling, information gathering, and manages the day-to-day business affairs to keep our advisors focused on serving clients

Contact Our Team

A member of our team will follow-up with you to discuss availability and confirm an appointment time, if necessary.

Somer Schimke

Somer Schimke

Client Services Manager

Somer supports the team and clients with facilitation of planning scheduling, information gathering, and manages the day-to-day business affairs to keep our advisors focused on serving clients

justin aman

Justin Aman

Family Business Behavior and Culture Consultant

Justin brings a deeper understanding of our family clients by bringing his knowledge of the human thought process to the team and serves as family business behavioral specialist, wellbeing and culture consultant. Justin has been with WillKate since 2014; first as an Administrative Assistant, then advancing to Project Manager, and now in his current role using both behavior analysis and consulting. Justin holds a Bachelor’s of Psychology (South Dakota State, 2017) and a Master’s of Clinical Psychology (Emporia State University, 2021) with an emphasis on stress and coping. Justin supports the team by gathering and analyzing responses from inventories, interviews, and surveys to facilitate client personal growth as well as developing group and organizational dynamics. This information provides the ability to understand the impact a person’s environment, experiences, upbringing, and values have on their thought process both in the work environment and their personal life. Justin is also a part of a research team at the University of Minnesota investigating proteomics in Down Syndrome and Autism.  

Casey Franken

Casey Franken, CFP®

Senior Family Wealth Advisor

Casey brings his passion for wealth building and guiding clients together by doing what he thoroughly enjoys as a Senior Wealth Advisor. Casey has been a practicing financial planner since November 2012.  He attained the CERTIFIED FINANCIAL PLANNER™ designation in April 2015. Casey graduated from the University of South Dakota with a double major in finance and economics. During the last semester of college, he passed the Level 1 of the Chartered Financial Analyst (CFA) program in 2011. The CFA designation is globally recognized and attests to a charter holder’s success in a rigorous and comprehensive study program in the field of investment management and research analysis. 

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Devon Braun

Devon J. Braun

Client Service Specialist

Devon is combining his passion for serving others and understanding their resources through specializing in client service for the WillKate team. After growing up in Spearfish, SD, Devon received his college degree from the University of South Dakota (Go ‘Yotes!) with a Bachelors in Economics and minors in Analytics and Psychology. During his junior year of college, he had an internship with a financial advisory firm, his first exposure to the financial services industry, but Devon hasn’t looked back since. After a brief stint back in Spearfish after college graduation, Devon and his wonderful bride, Madisyn, moved to Sioux Falls where Devon was able to begin his financial planning career with the WillKate team. Devon enjoys attempting to play golf, cooking tasty meals, drinking good coffee, aquariums, spending time outdoors, and going on evening walks with his wife and new puppy, Poppy.    

Contact Our Team

A member of our team will follow-up with you to discuss availability and confirm an appointment time, if necessary.