ards_boy
I don't see why it shouldn't be allowed but you'd need to run it past both companies.
My concern for you would be as a low houred pilot on his first job the first 6 maybe even 12 months are tough - there is a lot to learn, you'll be considered a 'training risk' and risk of failure is added pressure so becareful going into a rostered week of long days/multi-sector days totally knackered because you've just done a few 12 hour day/night shifts as a dispatcher - your company/captain won't appreciate it.
Great idea financially but maybe not sensible...I did my CPL around a full time job and that was hard work - just my tuppence worth!