To address your last question first; There is no real difference in the work once promoted, just more of it! Truly the only thing that changes is the pay and the production stats.
Typical day? Every day is different. If it’s a field day, I gulp down my coffee, fire up the laptop, check out cases for the day. Log into DCSA VPN and do a final check of case messages. Check my appointments, make certain I have all needed paperwork (releases, interview templates, etc). Hit the road. If it’s not too early, I might make a few quick phone calls before leaving the house. Go to scheduled interviews, if one is a no show or cannot see me, I sit in my car and make phone calls send emails. Boss might check in. There’s an email about new training that needs to be completed, or a set of case papers they want sent back ASAP. I’ll make unscheduled attempts for records (usually easy), residences or at the addresses of people who haven’t responded to my phone calls/texts/emails. Leave door tags, or if I’m lucky, knock out an interview (hopefully it’s not raining) on someone’s front step.
Lunch is either in the car if I’m having a busy day, or somewhere that has wifi so I can type up a quick record or source interview. I enjoy typing at my local library. It’s quiet, I can usually get a meeting room.
Back home late afternoon where I might type up interviews or brief new cases. Check in cases, making sure all case papers are accounted for. More phone calls.
If its a typing day (I usually don’t do an entire day of typing) it’s more coffee, phone calls in between typing casework, oh, remember to manifest no case work, print new case papers, remember to order more paper, complete a training module, respond to another investigator’s question on a case we are working together, send case messages on completed ESI, and on and on. Lock away creds, computer, case papers at the end of the day and get ready to do at all again tomorrow. : )
It’s an ever changing schedule, I suggest being organized yet flexible. Find a routine that works for you, and that might take some time. I’m a morning person, so I do a lot before I head to the field. Others are late night people who are more productive typing in the evenings.
I don’t know if they still do it, but Peraton used to have two days of “shadowing” once you’re cleared but before you start training. You ride with an investigator just observing their day. Sit in interviews, observe the cold calling, etc. It can be enlightening.
Good luck!