Colin Domoney discusses strategies for expanding an application security (AppSec) program and obtaining budget. He summarizes his experience expanding Deutsche Bank's AppSec program over four years from 150 to 2,500 applications. Key strategies included demonstrating business outcomes, cost savings, and compliance. Important metrics included flaw density, fix rate, maturity rankings, and policy compliance. Automation was critical for scale. A journey to a mature program involves becoming fully integrated into the software development lifecycle. Future-proofing requires investing in DevSecOps and automation to achieve long-term ROI and a competitive advantage through security.