I hope you’re doing well since <<last time you talked/how you know each other/where you met>>! Are you still working at <<ORGANIZATION>>? I’m thinking about applying for <<POSITION>> and wanted to see if you knew anything about the search or had insight about working at <<ORGANIZATION>>. I’ve been doing <<CURRENT JOB>>, but I am interested in <<INTERESTING ASPECTS ABOUT NEW OPPORTUNITY>>, and this position seems like a great opportunity for that. Thanks in advance!
(Side note: If you have a personal website or LinkedIn, link to that when talking about your current position. The information (and photo) there will help jog their memory of who you are.)