How can I safely shed about 65 lbs in about 3-4 months?

MsPanama
I've finally decided that I wanted to become a Deputy Sheriff and I can't have more than 26% body fat when I go in for my health assessment. Since I relocated by home and been around family I've gained back and more of the weight that I had lost when I lived a far and have been to lazy to start back my workout routine. The diet part I have covered but I wondered will Zumba and Core workouts (with the big ball) be enough or should I also incorporate my kettle bell workouts with this also?
How can I safely shed about 65 lbs in about 3-4 months?
5 Opinion