Open source is how most of software development is done today, but beyond enabling technological innovation, it can enable your evolution. First and foremost, open source has always enabled learning, the communities that coalesce around project foster mentorship - and as we all know, you need to keep adding skills to your resume to stay up to date with technology. Second, your work can be your calling card, resolution of issues and merged code improvements is a great way to show employees and colleagues not only what you are capable of but what you literally have done. Finally, participation goes well beyond coding to building your brand, networking, and communication of technology needs to stakeholders. Investing in open source is a must for anyone in or near software development.
