Would I need any special license to use my personal P3P to aid in this? I'm in Canada...."
Dear 3rdof5,
As 'Jack1134' pointed out correctly, anyone flying a UAV/RPAS in Canadian Airspace between now and 01 June this year for commercial purposes must necessarily be certified with a Special Flight Operations Certificate (SFOC) issued by Transport Canada (TC). Also as Jack1134 pointed out--as the owner and chief pilot of a commercial UAV/RPAS business in Western Canada I can attest to this fact personally--there is most definitely a 'boat load' of paperwork involved in submitting a SFOC application.
Given the close proximity in time of the 01 June change in RPAS regulations, there's little chance of you successfully preparing and submitting a SFOC application to fly a site evaluation on behalf of your employer before the new RPAS laws come into effect. In the meantime, if you believe that the UAV-related work your company is offering to send your way will prove profitable in the long run, my advice is that you purchase either a DJI Phantom 4 or Mavic series aircraft. Why? Because TC's recently publicized 'Approved Advanced Operations RPAS' list of DJI aircraft does NOT include the P3 Professional.
That's not to say your P3 Pro will be completely useless as a commercial, money-making aircraft after 01 June. Since the new regulations eliminate the distinction between 'hobby' and 'commercial' UAV operations you'll be able to take photos' and videos with your P3 Pro for payment whilst operating in non built-up areas without any special permission as long as you're in possession of a Basic RPAS Operator's License and obey the long-standing TC rules governing how and where to fly your aircraft in relation to aerodromes/airports/heliports, etc. But even if you possess an Advanced RPAS Operator's License you won't be allowed to fly your P3 Pro commercially in any built-up area or urban environment with or without a Special Flight Operations Certificate -- period.
On the matter of DJI's Phantom 3 Professional UAV, I presently own and operate two such aircraft commercially. They're great flyers, and extremely reliable--more so than my two, expensive Inspire 1 V2.0 aircraft and my P4 Pro machines. After 01 June I'll continue to utilize my P3 Professional aircraft for rural jobs (farm holdings, acreages, etc.), but even with my Advanced Pilot rating in-hand, after 31 May I won't take them out of their Nanuk cases within sight of a hamlet, town, or village.
If you haven't done so already, visit TC's "How to fly your drone safely" 'web site (references to which have already been made by other respondents to your initial post) and (1) register your P3 Pro, then determine to study for and pass the 'Basic' RPAS Operator's License online examination. Note: there are several well-made Canadian YouTube videos on the "How to..." aspect of studying for that particular examination, which passing grade is 60%--a most achievable goal.
Whichever way you decide to go, good fortune in your future RPAS ventures, business-wise or otherwise.
Cheers,
James