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About JJ Advisor Group
Whether it’s developing a financial plan, implementing a needs-based insurance strategy or preparing a detailed asset allocation analysis, our mission is simple: to build lasting, meaningful relationships with our clients while helping them make more informed financial decisions.
Our founder, Jon D. Johnson, established the firm 14 years ago with trust, integrity and superior client service at it’s foundation. With the heart of a teacher, Jon takes an active role in educating clients about financial matters, including tax-advantaged investing, charitable giving and estate planning. He is dedicated to providing customized, independent and objective financial advice to our clients as they work towards financial independence.
Meet the Staff
At JJ Advisor Group, our entire staff is committed to understanding your concerns and acting as your advocates as we tailor investment solutions for all of your financial challenges and goals.
Jon D. Johnson
CIMA®, AAMS® , CMFC®, Owner, Investment Advisor
Jon D. Johnson is a seasoned investment advisor and owner, bringing over 19 years of experience in the financial planning industry. As a Certified Investment Management Analyst (CIMA®), Jon is part of a diverse team of advisors dedicated to helping clients achieve their financial goals.
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Jon holds multiple licenses and designations, including:
- FINRA Series 7 and Series 66
- Life/Health Insurance License with Long-Term Care Certification
- Accredited Asset Management Specialist (AAMS®)
- Chartered Mutual Fund Counselor (CMFC®)
Jon specializes in asset management, retirement planning, financial planning, insurance, and 401(k) plan assessments. His dedication to excellence has been recognized through his participation in the prestigious Cambridge Signature Class of Advisors. He has also served as a Dave Ramsey SmartVestor Pro, reflecting his commitment to client-centered financial strategies.
Background and Education
Originally from Littleton, Colorado, Jon earned his undergraduate degree in Electrical Engineering from the Colorado School of Mines. He further advanced his expertise through the Chicago Booth School of Business CIMA® program. His career includes roles in middle management at mid-sized corporations, ownership of small businesses, and extensive international travel during the 1990s while working with Sodak Gaming, delivering gaming equipment to tribal clients.
Community Engagement
Jon is deeply involved in his community and church. He has served in various leadership roles at Calvary Lutheran Church, including Secretary, Stewardship Chair, and Call Committee Chair. His civic contributions include serving as President of the Rushmore Rotary Club (2013-14) and as Board Chair for the local Red Cross chapter.
An avid athlete, Jon has completed multiple half marathons and a marathon, fueled by his passion for sports like soccer, backpacking, hiking, golfing, and fishing.
Personal Life
Jon and his wife, Tina, reside in Rapid City, South Dakota. They are proud parents to two adult children, Tyler and Kellsie, and grandparents to five energetic grandchildren.
Isaiah M. Judge
Financial Advisors
Isaiah is a Financial Advisor with JJ Advisor Group who helps clients achieve their financial dreams by building lasting relationships and personalized plans.
Before starting his career as a financial advisor, Isaiah worked in various roles with Wells Fargo Bank for 10 years as lead teller, assistant branch manager, personal and small business banker, and brokerage associate. He holds several licenses with FINRA including Series 7, Series 6, Series 63, 65, and Life/Health Insurance Licenses.
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He has been a proud resident of Rapid City for over 25 years where he graduated from Rapid City Central in 2008. Isaiah is on the Board of Directors, as the Vice Chairperson, with the Red Cross, is an active member of Elevate Rapid City Chamber of Commerce, a graduate of the Elevate Leadership Institute, and generously volunteers with Feeding South Dakota.
When he is not meeting with clients, Isaiah can be found fishing for bass, hunting pheasant, or spending time with his 2 adorable children, Charlotte and Dominic. He is lucky to have his entire family living in SD which includes 3 older siblings, 15 nieces and nephews, and his father.
Carol Devroy
Administrative Assistant/Office Manager
Carol joined JJ Advisor Group in September 2020. She brings with her a wide array of experience, beginning her career 24 years ago in Chicago as an administrative assistant for a financial advisor.
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She left the workforce to be at home with her children and returned in 2012 as a trainer for the Illinois Tollway Call Center. A job change for her husband brought Carol to New York City, where she worked as an office manager for a research publishing company that provided style sheets to the financial services industry. In her role at JJ Advisor Group, she is the first line of contact and oversees office operations, being a bridge between our advisors and clients. Her goal is to provide our clients with the best possible service by building and maintaining trusted relationships.
In early 2019, Carol and her husband Paul moved to Rapid City, SD. They enjoy spending time with their three grown children, son-in-law, and three grandchildren. Carol and Paul attend St. Paul’s Lutheran Church, and in their free time, they enjoy traveling and camping.
Carol Wood
FPQP®/Paraplanner
Carol is a paraplanner who helps plan and navigate clients’ goals and financial futures. She holds the Financial Paraplanner Qualified Professional (FPQP®) accreditation, bringing a deeper level of knowledge to our client’s financial plans. She also holds many hats in the office to include knowing compliance requirements, marketing, and scheduling.
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Before starting as a paraplanner, Carol worked as the administrative assistant for Jon Johnson. She has been in the finance industry for thirteen years in many roles, including teller coordinator, customer service specialist, and detection specialist in financial investigations. After a successful career in financial support roles, Carol now assists Jon in planning for clients’ financial needs. Her goal is to help clients achieve their financial targets while making their money work best for them and providing exceptional customer service.
Carol enjoys traveling, gardening, hiking, and crocheting in her spare time. She is a proud military spouse and currently lives in Rapid City with her husband and 17-year-old daughter.
Check the background of investment professionals on FINRA’s BrokerCheck.
Our Services
Fiduciary Advisory Solutions
A fiduciary duty is the highest standard of care for clients.
Financial Planning
Providing a roadmap to achieving your financial goals.
Investment Planning and Management
Customized investment strategies based on your individual circumstances.
Socially Responsible Investment Strategies
Aligning your personal values (social, environmental, biblical) with your investment objectives.
Insurance Planning
Evaluating current and future insurance needs and optimizing coverage.
Retirement Planning
Enabling you to successfully provide for your own future.
Estate Planning
Preservation of wealth from generation to generation.
Long-term Care Planning
Ensuring that you and your heirs are well cared-for.
Financial Literacy workshops and seminars
Training and education opportunities to keep you informed and updated.
Clients
Access Your Personal Accounts
CLIC Advisor
View your investments, set goals, create budgets, track spending, and more. Securely store important documents and access documents from our team from your personal digital client vault.
CIRStatements
CIRStatements allows you to stay up to date on your accounts. You can view your account balances, track performance, and run multiple styles of reports.
NETX 360
Access to your account information, balances, holdings, realized and unrealized gain/loss, account history, and transactions. Manage your eDelivery options and select which documents you would like to receive electronically or in the mail. Access your official statements, confirms, tax documents, and even proxies from this central hub.
Resources
A compilation of helpful links, articles, and information designed to educate and empower our clients
Recent Blog Post
Market Commentary | October 13th, 2025
The ongoing government shutdown has created a data vacuum, delaying key economic reports and clouding visibility for the Federal Reserve ahead of its next meeting. Markets now face the unenviable task of interpreting policy direction with limited official data, relying instead on supplemental and tangential indicators to gauge the economy’s trajectory.
Contact Us
Contact Info
Phone: (605) 716-2641
Fax: (605) 593-8026
Text Hearsay: (605) 389-3693
Address
JJ Advisor Group
1604 Mountain View Road Suite 2
Rapid City, SD 57702