ftqerm

I'm sure this has been asked before but I couldn't find any information. I graduated with my bachelors in 2008, and even though I always wanted to go to graduate school, I didn't keep any ties with my professors. I've been working in the industry ever since, and we only have one engineer who is higher than me, not including my boss (who is also an engineer). I'm having a tough time figuring out what to do and would hope you guys can help me in trying to figure out what to do about finding letters of recommendation. Thanks for your time!