Technically, if you
read a typical 333 Exemption, in condition #14 it says the operator (the licensed pilot) can allow a PIC (pilot in command) to do the flying if they demonstrate the ability to fly safe. So this means the licenced pilot doesn't have to be the PIC (pilot in command). So if your dad was a licensed pilot, he could observe you flying a commercial job, and you'd be legal. Since you always need a VO (visual observer) for all commercial flights anyway, the licensed pilot can be the VO and you can be the PIC, assuming you have demonstrated to the pilot your skill set of flying safe. Of course, you still need the N number and liability insurance, but this is a small loophole that some owners may be able to take advantage of, assuming the circumstances are in line with this caveat.
14. The operator may not permit any PIC to operate unless the PIC demonstrates the ability to safely operate the UAS in a manner consistent with how the UAS will be operated under this exemption, including evasive and emergency maneuvers and maintaining appropriate distances from persons, vessels, vehicles and structures. PIC qualification flight hours and currency must be logged in a manner consistent with 14 CFR § 61.51(b). Flights for the purposes of training the operator’s PICs and VOs (training, proficiency, and experience-building) and determining the PIC’s ability to safely operate the UAS in a manner consistent with how the UAS will be operated under this exemption are permitted under the terms of this exemption. However, training operations may only be conducted during dedicated training sessions. During training, proficiency, and experience-building flights, all persons not essential for flight operations are considered nonparticipants, and the PIC must operate the UA with appropriate distance from nonparticipants in accordance with 14 CFR § 91.119.
By the way, you can read all of the 333 exemptions the FAA grants on a daily basis
here. They are public.
Also, the best deal I have found to file for the 333 exemption is with
Aces Deals for $149. Others charge over $500 for the paperwork, and it's a lot of paperwork if you don't hire someone else to do it.