Katherine Rasmussen is a Computer Systems Engineer who applies Linguistics knowledge to developing, testing, and compiling programming languages for high-performance computing. She has experience in language grammars and abstract syntax trees (ASTs) for Fortran, C, and C++. She works in the Computer Languages and Systems Software (CLaSS) Group at Lawrence Berkeley National Laboratory where she contributes to the Julienne unit-testing and string-handling utility, the LLVM Flang Fortran compiler, and the Caffeine parallel runtime library. She does software archaeology, digging through ancient layers of legacy code for purposes of modernization, porting, building, testing, and parallelization. She also serves on the Fortran Standards Committee and is the Community Lead for the Parallel Runtime Interface for Fortran (PRIF) Committee.