Killswitch Advisory
Expert Cybersecurity Solutions for Startups
Protect your startup with tailored security strategies
KILLSWITCH ADVISORY
Killswitch Advisory: Security That Knows When to Pull the Plug
At Killswitch Advisory, we help startups and high-growth companies make smart, surgical decisions about security—before they’re forced to. Led by a seasoned vCISO with deep roots in offensive security, compliance, and boardroom strategy, we don’t just identify risks—we help you act decisively.Our approach blends tactical expertise with executive foresight. Whether you’re scaling fast, navigating audits, or just trying to stay ahead of the next breach headline, we embed alongside your team, two days a week or full throttle, to give you clear, no-BS security leadership when and where it counts most.
BIL HARMER
CEO & Founder
With over two decades in the trenches of cybersecurity, Bil Harmer has helped steer startups through chaos, scale, and scrutiny. He’s built programs from scratch, cleaned up after breaches, and advised boards before the regulators came knocking. Former CISO, trusted advisor, and frequent speaker, Bil blends deep technical knowledge with the business acumen to make security a strategic advantage—not just a fire drill.At Killswitch Advisory, he brings this experience to bear for companies that need more than checkbox compliance. His style? Direct. Strategic. And always aligned to what matters most: protecting the mission while enabling the business to move fast—without blowing itself up.
LOCATION
Forged in San Francisco, Built for the Firefight.
Killswitch Advisory was born in the same pressure cooker that launches unicorns and burns out good ideas. We’ve lived the zero-day pace of Bay Area startups—and we bring that same urgency, precision, and grit to every client we advise.
