Where does tiger wait for the prey ? Water hole....

Pick the profession where you get this problem most. White collar jobs..Software engineers, technologist, etc etc...

If you already have a customer base (i am sure you have) , you can identify the persona (similar customer) to target.

All your strategies should be geo-targetted on those persona..

You can go two ways 1) SEM (like PPC) or 2) Organic Content 3) Highly targeted display ads (captive) 4) Information distribution (seminar or webinar).

Based on you budget, time, geography you have to pick one channel, test your campaign and double down if it works...

If you wanna talk to me ..do let me know..
We can brainstorm some immediate marketing ideas !