Johnson City, TN

Start With a Free Custom Quote

Policy Options - Instant Quotes - Trusted Carriers - Compare & Save

By submitting the information above, you are agreeing to be contacted by a Licensed Sales Agent by email or phone call to discuss information about Medicare Insurance Plans. This is a solicitation for insurance.


1Source Insurance was founded with the aim of helping individuals and businesses find the insurance products they need at a cost that’s affordable to them. Our agency is recognized as a dependable source of insurance for both personal and commercial needs. We only work with A rated carriers so we can find the best products and the ideal type of coverage for each of our clients, based on their unique needs. Our goal is to form strong partnerships with our clients and to be your 1 and only source when it comes to your insurance needs.

Meet Your Executive Team

Casey Lille 1 Source Insurance Group

Casey Lillie | CEO


Look for the center of the action, and that’s where you’ll find Casey Lillie. His vision, can-do attitude, and hands-on approach have brought him great professional success and personal satisfaction. Casey excels in creating opportunities for others to succeed. His experience grants him unique insight into the upper reaches of Medicare, Life and Annuity marketing and sales strategy. When he’s not consulting with an agency principal on lead generation or the details of a 401k rollover, there’s no telling what Casey is up to. He could be hunting a bear, deep-sea fishing, enjoying a building project, teaching his kids a new skill, or planning his family’s next great travel adventure.

Denise Lille 1 Source Insurance Group

Denise Lillie | CFO


No detail gets past Denise Lillie- she doesn’t miss a beat or overlook an opportunity to help agents grow their business in a compliant way. Denise is highly skilled in managing appointment setting teams and long-term client retention strategies. The time she invests each sales season compiling plan data and generating market-specific action plans pays off every year. Put a cup of coffee in her hand, and she can complete any project in an accurate and timely manner. Denise loves adventurous travel, hanging out at the pool and spending time with her family… especially on days when her alma matter’s UT Vols look alive on the ballfield!

1Source Insurance Brandon

Brandon Riles  | Agent


Originally from Florida, Brandon has been in East Tennessee for almost a year. After a wonderful family vacation, Brandon decided to make East Tennessee his home. He enjoys traveling and spending time with his family. Brandon Has been married to Stacy for 10 wonderful years, and together they have two beautiful children. When Brandon isn’t working, he enjoys traveling, sightseeing, and exploring new places.

Brandon is passionate about helping the community and finding solutions to their problems. He believes it is his responsibility to guide each of his customers through their questions and provide the products and knowledge that will serve them best. Brandon is always willing to answer questions and loves the tough ones! If he does not know the answer, he is determined to find it. He specializes in homeowners and auto insurance and prides himself in finding all available discounts for the best coverages! Feel free to give him a call and test his knowledge!

We Work For You

As an independent agency, we’re able to represent our clients’ needs without any conflict of interest that comes from a rigid alliance with a specific carrier. The result: Custom-tailored coverage based on your goals, your life, and your budget.

What We Can Offer

No matter what type of coverage you need, we can help you find the best policy at the most competitive cost. Our aim is to help you achieve the important peace of mind that comes from knowing you have the right insurance coverage working for you. We’re also committed to providing the best customer service in the industry, which means that when you contact us, you can relax, knowing your needs are our priority.


1Source Insurance Group

2710 South Roan Street
Johnson City, TN 37601
Phone: 888-985-9191
Fax: 888-225-0714

  • Auto Insurance
  • Home Insurance
  • Commercial Insurance
  • Life Insurance
  • Health Insurance
  • Motorcycle Insurance
  • Boat/Watercraft Insurance

Contact Us

Don't wait until tragedy strikes you! Let us help you get the coverage you need without wasting any more time. Contact the agents of 1Source Insurance Group to learn more about your options and how you can get a quote.

By submitting the information above, you are agreeing to be contacted by a Licensed Sales Agent by email or phone call to discuss information about Medicare Insurance Plans. This is a solicitation for insurance.