The mission of Trusted CI, the NSF Cybersecurity Center of Excellence, is to lead in the development of an NSF Cybersecurity Ecosystem with the workforce, knowledge, processes, and cyberinfrastructure that enables trustworthy science and NSF's vision of a nation that is a global leader in research and innovation. Trusted CI has a long history in supporting improvements in assurance of scientific software via secure software training and in-depth vulnerability assessments.