So you all want to be armchair USGA Rules Officials?
Year you go.
Golf Rules Quiz Questions : USGA/R&A Exam Prep
Practice up.
Want to work at the US Open as a USGA Rules Official?
Take the USGA Rules test. Volunteer for some local tournaments until you have enough experience to work a PGA sponsored local event. Do that for 5-10 years and maybe you can work up to being an assistant at a minor USGA event, like the Four Ball or Amateur Qualifying.
Work as a Rules Official at USGA minor events for another 5-10 years.
After 20+ years, if you've proven yourself to be one of the 50 or so best Rules Officials in the USA, you *might* get the chance to work at the US Open.
Thomas Pagel, who was in charge at the US Open (& all USGA events), has been a Rules Official for 24 years, 12 with the USGA. He has a fairly good grasp of the Rules of Golf.
I sent him an invitation to join TOTV.