A Slidell, LA, police officer died after suffering a medical emergency on duty Sunday.

Officer Theresa Simon presumably suffered a massive heart attack while working. She was pronounced dead at a local hospital after lifesaving measures failed, WWLT reports.

She has held positions as a patrol officer, detective, academy instructor, and field training officer along with her most recent role as a School Resource Officer at Little Oak Middle School. The Slidell PD said she had just passed her promotional exam to become a sergeant earlier in the week.

Slidell Police Chief Rady Fandal said in a statement:

“This is a big loss to our law enforcement family and citizens of Slidell. Officer Simon served and protected this city for over a decade and touched the lives of many. She is married to current Slidell Police Lieutenant Kevin Simon and has two loving sons, ages 2 and 10. Please keep the Simon family in your thoughts and prayers as this will be a very difficult time for them, as well as all of us here at the Slidell Police Department.”