Conditions for the validity of Salaah

Performing Fajar Salaah before Azaan

Q: Can a male perform Fajr salaah 10 to 20 minutes before the Fajr Salaah. I work 70 km away from my work place, it takes at least 1 hour in the morning to get to work I have to open up the building and warehouse that accommodates a staff of 250 people. So I have to leave home by at least 5.30am to make in time to open up for the staff members. Please advise can I as a male perform my Fajr salaah 10 to 20 minutes before the Fajr Azaan?