Hey I play an operative for the most part, but unless the mission is dealing with my class specifically i find myself running around and playing TDM. Is there anything i can do other than that to further team progress? Also if you have developed any cool/useful operative techniques please share, I ould really like to hear about them.

Try stealing defencive turrets and planting grenades that help your team know where the enemy is coming from. Always keep on the move seeking mines and stealing command posts even if they're away from the main mission. You're still helping your team out.

Disguise and run around to the current skirmish hot-zone, use Homing Beacon on your fake-allies to show where they are hiding.
The surplus of engineers lets you always be able to hack and/or control a turret. At least hacking them is easy when disguised.
EMP grenading turret chokepoints.
Mine-spotting is an option, but I find that there are generally better things to do with your time.

And you can always hack+firewall the enemy's command posts