Teams handle security culture change in DevSecOps by shifting responsibility for security from a single team to everyone involved in the software lifecycle. This starts with leadership support, continuous training, and clear communication about why security matters. Teams embed automated security checks into CI/CD pipelines, making secure practices part of daily workflows rather than an extra task. Collaboration between developers, operations, and security teams helps reduce resistance and builds shared ownership. Encouraging early feedback, blameless incident reviews, and hands-on labs also strengthens adoption. Many professionals validate this mindset shift by pursuing an AWS DevSecOps Certification, which reinforces real-world security practices.