I knew Roy, but not particularly well. We met at the GIS Show and I recall speaking with him about a few projects over the years. As many know, he was well known for his expertise on landfill conversions to golf — a highly specialized sub-field that was very popular in the 1980s-90s, but not as much any longer.
This is because landfills are now "uber-constructed" to the point where they are often 50-feet or more in height and hardly conducive to a golf course. Where landfills used to be canyons filled in with waste, or perhaps mostly "level" ground across a few hundred acres, they are now engineered structures because operators want to get every last sand and gravel $$ out — and every last piece of waste in.
RIP Roy. I enjoyed the few times we met and spoke.