Has there ever been any explanation as to how Walt lost his job at Sandia Labs and became a teacher? TIA.
Nothing on the Breaking Bad Wiki about it.
Around 20 years ago, Walt worked in Application Labs ("Cancer Man"). He also worked in a chemical lab near Los Alamos, and met Skyler White, a hostess at that time, in a restaurant ("Cancer Man"). He moved to Albuquerque to work for Sandia Laboratories just prior to his firstborn ("Full Measure").
Walt eventually went on to become a chemistry teacher at JP Wynne High School where his son, Walter White Jr., also attends as a student. Financially, this job was not enough to support his family, so Walt took on a second job at the A1A Car Wash.