About Us
A Family Agency Serving Central Texas Since 1986
Grissom Insurance Group, formerly Timmons Insurance Group, has served Cedar Park, Kingsland and the Highland Lakes for nearly four decades with personal, independent insurance advice.
We Work for You
Unlike a captive agent who represents a single insurance company, we advocate for you. When you call, you speak directly with an agent who knows your policy and stays with you through the claims process, not a call center.
Personalized Solutions
Insurance is not one-size-fits-all. By working with a variety of carriers, including Germania, Safeco and Progressive, we build coverage packages tailored specifically to your home, vehicles, rental property or business.
Advisors, Not Salespeople
Our goal is to educate you on your options in a fast-changing insurance market, so you can make an informed decision. Reach us by phone, text or email — whichever works best for you.
Rooted in Our Community
We proudly support local schools, athletic programs, chambers of commerce and service organizations across Cedar Park, Leander, Kingsland and the Highland Lakes.
Led by a Third Generation of Local Ownership
Heather Grissom joined the agency in 2006 and became owner and agent of record in 2022, carrying forward a family tradition of honest, personal guidance for Central Texas families and business owners.
That same commitment guides every agent across our Cedar Park and Kingsland offices — real relationships, not a sales script.
Our Team
Licensed agents in Cedar Park and Kingsland ready to answer your questions.
Heather Grissom
Owner and Agent of Record
Both Offices
Heather, a mother of three (twin boys Matthew and Mark, and daughter Emily), is married to Matt Grissom, head baseball coach at Leander High School. She has lived in the Leander area for over 20 years and is actively involved in her community. Heather holds her P&C and Health and Life insurance licenses. Before purchasing the agency, she was the personal lines manager for all Timmons Insurance offices.
Mary Wehmeyer
Personal Lines Specialist – Cedar Park
Cedar Park office
Mary, a mother of two grown children, Justin (a firefighter) and Kristin (a law school graduate), joined Timmons Insurance in 2016 with over 20 years of experience. She holds her P&C and Life & Health insurance licenses.
Teresa Gray
Personal Lines Specialist – Kingsland
Kingsland office
Teresa is married with two daughters and holds a BA in elementary education from the University of Houston. She has been an agent since April 1997 and loves volunteer work. She is actively involved in various community organizations and events.
Angela Wrinkle
Personal Lines Specialist – Cedar Park
Cedar Park office
Angela is the proud mother of two young men, Schuyler and Tanner. Schuyler is newly married to the love of his life Dr. Karigon Rion. Angela has been married for 35 years to Thomas Wrinkle, loves this stage of life and spending time with family. She has lived in Williamson County for 23 years and has worked in the insurance industry for 19 years. She holds her P&C and Health and Life insurance licenses.
Jennifer Grissom-Choate
Office Manager
Both Offices
Jennifer is the proud mother of two young men, Brendon and Carson. Both boys served in the United States Air Force and are now vets. Brendon is married to Pearl, and living in Michigan. He will be graduating from the University of Michigan in 2025, GO BLUE. Carson is living in Austin and works as a cybersecurity specialist. Jennifer lives in Yoakum Texas with the love of her life, Chuck. She has worked in accounting and office management for over 25 years. She holds her P&C insurance license.
Alva Timmons
Agent – Business Manager
Both Offices
Alva Timmons was the owner and agent of record for Timmons Insurance Group until 12/31/2022. She has been happily married for 27 years to her husband Derek, and they have raised two successful grown children – Kaily and Ross. Alva has owned the agency since 2001 after purchasing the business from her father-in-law, Hershel Timmons. Alva handles all business management of the company. She is very involved in the Lake Travis Chamber of Commerce, among other service projects.
Our History
1986
Founded by Hershel R. Timmons.
2001
Alva Timmons acquires the agency.
2006
Heather Grissom joins the team.
2016
Kingsland office acquired.
2016
Cedar Park office acquired. Blake Sieck joins to lead the commercial division.
2017
Mary Wehmeyer joins the team.
2020
Teresa Gray joins the Kingsland team.
2022
Heather Grissom becomes owner and agent of record.
Ready for insurance that actually works for you?
Talk with a local agent in Cedar Park or Kingsland, or send us a few details and we will follow up quickly.