Keith Charles Kossaeth entered rest on January 7, 2021 in San Antonio at the age of 48, with the love-of-his-life, his wife Mary Kossaeth, by his side. He was born on January 10, 1972 in San Antonio, Texas to Kenneth and Hermina Kossaeth.

Keith was gentle, full of life, and full of love. He was a loving husband, the best father, loyal son, loyal brother, and incredible friend. He always put family first but also dedicated his life to helping and growing others. His life work to public service in Education as a Teacher began in 1996. In those 25 years, he shared his love of Science to all. In 2019, he advanced his career by becoming a Science Coordinator and Physics Teacher at O'Connor High School. He was highly respected and loved by his students and colleagues. His passions outside of teaching included anything outdoors, whether it was hunting, fishing, camping, or kayaking. Keith was also a Boy Scout leader and coach to his youngest son's soccer team. He spent every moment of his life as a shining example for his children and those around him. While always finding time to teach his youngest son, Kevin, by passing on his knowledge of the outdoors and raising him to be the best man he could be.

Keith lived each day to the fullest and always had a welcoming smile on his face. He was well known for ending each class with the quote "Be sure to do something good for someone today."

He is preceded in death by his mother, Hermina Hitzfelder Kossaeth.

He is survived by his loving wife, Mary of San Antonio; children, Kevin Kossaeth, Tiffany Contreras (Laura), Serina Gutierrez (Danijel) all of San Antonio, Aaron Gutierrez of Kyle; grandchildren, Aviana Johnson and Axel Contreras of San Antonio; father, Kenneth Kossaeth of D'Hanis; sisters, Lynette Sumner (John) of Adkins, and Tammy Kossaeth of D'Hanis; nephews, Craig and Jason Sumner of Adkins.

Public visitation will be held on Monday, January 18, 2021 from 4-7 pm at Tondre-Guinn Funeral Home in Castroville. A virtual rosary and mass will take place on Monday January 18, 2021 at 7 pm.

https://zoom.us/j/9039914835?pwd=cU5TdjJQeUxBODQ3aGEzNXdDM1hpUT09 The burial will be private.

Meeting ID: 903 991 4835

Passcode: 604411