Interview › Security & DevSecOps
How do you measure the effectiveness of your security program (MTTR for vulns, coverage)? [Advanced]
Answer
I measure security program effectiveness with outcome and coverage metrics: vulnerability MTTR, SLA compliance, critical exposure count, KEV exposure time, scanning coverage, policy violation rate, secrets incidents, mean time to detect/respond, exception aging, and control pass rates.
Technical explanation
Raw finding count alone is misleading because better scanning can initially increase findings.
Metrics should show risk reduction, speed of remediation, and whether controls are actually deployed across the estate.
Use service/team dashboards so ownership is visible and improvements are measurable.
Hands-on example
Security scorecard: 98 percent repos have SAST/SCA, 95 percent images scanned, critical vulnerability MTTR 3 days, KEV exposure less than 24 hours, 0 public S3 buckets, 100 percent prod deploys signed, 12 aged exceptions needing review.
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