UPDATE: Turns out it was a #Unix SME; a Solaris / SunOS expert with basic understanding of #RHEL—which is my area of (limited) expertise. It was cordial and he asked pertinent scenario questions as well as some good ice breakers. He said he didn't know what my biggest challenge would be, indicating my learning curve might not be as steep as they or I imagine. My gut tells me we are most likely a good fit and there is room to grow. If it doesn't go any further, no harm done as nothing changes.