I think for O(1) in each category you can write "have conceived, designed, and implemented" a log(n) concept, construct, or tool.

data structures: creator of skip lists

algorithms: creator of genetic algoritms

systems programming: lead engineer on JVM HotSpot

source control: "subversion sucks, here's Git"

build automations: creators of Maven

etc. (You can go down the whole list and figure out exactly what O(1) is and who belongs to that set.)