There are a couple ways you can do this.
One easy way is to use Action Rules to either edit all new tickets and add your department to the CC (either individually or through an e-mail distribution group) or another Action Rule to send an e-mail. You could probably even use the Action Rule criteria to define specific time periods that would alert everyone vs. normal business hours.
The other way is if everyone is in the same tech group and level, you can set the tech group alerting options to alert all techs when a ticket is opened.
Hope this helps!