Mayor Teri Johnston was born and raised in Conrad, Iowa, attending John F. Kennedy College on one of the first athletic scholarships offered to women. She is a three-time All-American softball player and graduated with a Bachelor of Arts degree. Teri spent 21 years with the privately held corporation Hollister Incorporated, a manufacturer of disposable healthcare equipment. She began her career at Hollister in sales, human resources, and sales management for their domestic division. Teri was promoted to their International Sales and Marketing Division and retired as Director of Marketing for their European Division based in Wokingham, England.
In 1995, Teri became co-owner of Affiliated Design & Construction Managers, LLC specializing in new construction, renovations, and historic restorations.
Teri's personal life is centered on her partner of 38 years, Dar Castillo; daughters Stacy Ryan and Jennifer Castillo; son-in-laws Dan Ryan and Vincent Luisi; granddaughters Scoutt Ryan, Reily Ryan, Avery Capcik, and Harper Luisi; her Cavalier King Charles spaniels Oliver and Gracie, and finally Lily, the cat.