Alice K. was a Lumon employee who worked in Optics and Design. She acted as the previous Optics and Design Chief and was succeeded by Burt.
Alice K. was referenced by Burt just once:
Dylan: Exactly how the fuck do you know where this office is?
Burt: My predecessor, Alice K., came here once when they still did the summits, and she’d left directions.Season 1, Episode 4, The You You Are (7:05)
Nothing else is known about her, including whether or not she still works at Lumon.