About 15 years ago the company I work for was a title sponsor of a 3 day horse trials at the USET headquarters here in NJ. So I used to go and volunteer which was SO much fun! I sat at the finish line on the cross country course and timed the riders as they flew through (we were back up to the electronic timers back in the day). I did this for about 3 years.
One of our company owners is big time in to equestrian sports and is an owner of some pretty high level horses. I think it's the o'Connors who ride them...but would have to double check as my memory is really quite awful.
Also was a jump judge for a few smaller events. But I've not done anything like that for years and years and years. Good times good times!