"To quit" is an irregular verb in English, the past tense is just quit instead of quitted. So "I quit" can be either present or past tense, but from context it

"To quit" is an irregular verb in English, the past tense is just quit instead of quitted. So "I quit" can be either present or past tense, but from context it would be clear that "I quit infosec" is past tense.