All these professionals are very important in our life.
1. Lawyer
2. Doctor
3. Banker
4. Police
5. Pastor/a leader as per muslim and any religion you believe
6. Mentor

Having this people around is very good and important for our day to day activity, but we must be very careful, because we must choose the best and the trust worthy ones among them. We need to get used to the ones we choose and motivate them so as to be our good use to us. Having their phone number in our contact can save us a lot of damages at any given time.