The ARRL and FCC have been wrangling over the Official Observer (OO) program for a bit, and the OO program was shut down. In its place, a Volunteer Monitor program is in the process of being established. Details here.
After a bit of poking around, I found the application, filled it out, and submitted it. Given my interest in metrology, it seemed a natural fit. We shall see.
(Edit 5/30/19: I received a confirmation that my application had been received by the program manager, who said “We are working though all this in the next several months”. Sounds good)