(かつやく) Used in business or showbiz – to be doing a lot of things which are getting the notice of one’s peer group. To succeed in making a name for one’s self. To be going places.
(かつどう) Not used in a business context. かつどう means ‘She’s active in charities and AIDS awareness.’ ‘He’s really active in the youth baseball league.’  ’This area has been a hotbed of gang activity.’
(せっきょくてき) Someone who is active, as in always getting stuff done, a self-starter, someone who is DIY – as opposed to a passive, timid, apathetic, obedient person.