Description: Actuarial models increasingly drive critical decisions, yet traditional governance - shared drives, file names, and Excel changelog tabs - create confusion and weak auditability. Version control systems, especially Git, offer a proven alternative by recording every change with author, time, and rationale, enabling reproducibility, collaboration, rollback, and transparent peer review. Git’s ecosystem (GitHub, GitLab, Bitbucket) adds pull requests, issue tracking, and centralized documentation, supporting auditors and regulators with a single source of truth. Actuarial use cases can include code and spreadsheet models, assumption management, and even monthly SQL queries. Adoption requires tooling, standards, and security discipline, but overall strengthens integrity and readiness for data-driven work.