Alyssa has been a CPython core contributor since 2005, and served on the inaugural Python Steering Council in 2019. She was the default approval delegate for Python packaging interoperability PEPs from 2013 to 2018. She was elected for two terms on the Python Software Foundation Board of Directors (2014-2016), and founded the PyCon Australia Education Seminar in 2015.

Professionally, Alyssa's career has spanned high frequency radio communications in the Australian defence sector, automated hardware integration testing infrastructure for Red Hat Enterprise Linux, remote management and monitoring of global EV fast charging systems, and, most recently, enabling local execution of generative AI language models.