In Memory of Shane Matthew Guess

1980 – 2026

The College of Engineering and the Nuclear Engineering Department mourn the passing of Shane Matthew Guess, who died on September 11, 2026, at the age of 46 after boldly facing glioblastoma.

Shane earned his Bachelor of Science in Nuclear Engineering from the University of California, Berkeley in 2002 and later completed his Master of Business Administration from the University of La Verne in 2008. A proud Golden Bear, Shane carried his Cal spirit with him throughout his life and career.

Shane devoted more than 24 years to Pacific Gas and Electric Company at Diablo Canyon Power Plant, where he rose through the ranks in remarkable fashion. His career reflected his deep technical knowledge and his exceptional ability to lead and inspire those around him.

Beyond his professional life, Shane was an environmentalist, a lover of coffee, languages, music, and travel. Having successfully managed juvenile diabetes, he was a passionate supporter of autoimmune therapy research…With his infectious laughter and generous heart, Shane brought joy to the lives of so many.  

Honoring Shane’s Legacy

In honor of Shane’s legacy and his deep connection to nuclear engineering, his family has requested that memorial gifts be directed to the Berkeley Nuclear Engineering Department. These contributions will support future generations of nuclear engineers and carry forward the spirit of leadership and dedication that defined Shane’s remarkable life.

To make an online gift in memory of Shane Matthew Guess, please click here. When completing the form, be sure to enter “Shane Guess” in the “In Memory Of” field. Please also include Kristin Guess at kristinguess@gmail.com in the gift notification section so the family may be informed of your generous contribution. 

For those wishing to initiate a matching gift, you will receive a receipt via email to help you start the process.

Alternatively, you may also contact Eileen Morris at ewmorris@berkeley.edu. Go Bears.