A Checklist identifying key tasks, skills, and responsibilities that law firm senior startup associates should develop and master to help advance their careers. This Checklist covers the startup-specific tasks, transaction and client management skills, and other professional skills, such as time management and business development, that senior startup associates should gain during their sixth year of practice and beyond. Although not exhaustive, this Checklist provides a guidepost for senior associates at law firms of all sizes and is representative of a general startup practice. It also builds on the tasks, skills, and responsibilities that junior and midlevel associates should develop (see Junior Startup Associate Development Checklist and Midlevel Startup Associate Development Checklist).