The 13-year-veteran of the San Francisco Fire Dept. is described as a loving father, dedicated husband, and fearless firefighter and paramedic.
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CAL-OSHA confirmed Cortez died after falling three stories off a high rise that caused severe head injuries.
ABC7 spoke with Justin Moore, a California firefighter and founder of FirstInSafety, an organization that studies safety protocols for first responders. Moore consults with fire agencies across the country.
"These training facilities are very well designed with engineered safety precautions as well as administrative barriers in order to lower the risk," Moore explained. "But, no matter how many administrative barriers...there is always going to be a certain margin of risk."
According to Moore, the two most common exercises that result in firefighter injuries or deaths are live-fire training or escape route drills.
"Those training evolutions involve them coming out of a window, coming onto a ladder, and escaping out of a window onto a ladder," said Moore.
VIDEO: Paying respects to late SF firefighter, Jason Cortez
A retired firefighter told ABC7 another risk in those situations is flowing water that makes the escape floors wet.
"It can be very dangerous," he said. "Because is the intensity of the training and the environment of the training."
According to the National Fire Protection Association, 48 firefighters have died so far this year. Three of those deaths were due to falls.
As a preventative measure, CAL-OSHA requires a safety officer should be assigned in certain cases involving dangerous hazards.
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Stephanie: "What hazards would have to present in order to require having a safety officer be in a reasonable proximity to the scene of the accident?"
"Live fire training is very specific, if we are producing smoke and fire that meets that requirement...then we would be required to have a safety officer on scene," he said.
It's unclear if a safety officer was required or present during Cortez's accident.
ABC7 asked CAL-OSHA, but the agency could only confirm a comprehensive investigation is underway. Under statutory law, CAL-OSHA has up to six months to complete this investigation.