history: I'm about to leave the job I've had for 3 years and go to a new company.  Next week I'm leaving the company I've worked for for 3 years and taking a totally new position at a new company. I'm nervous! 
current: Thats awesome, never settle for less. Always strive for more!
next: Yes this is definitely an upgrade! I'm just going to be the "new" person and I really do like my current co-workers. 