Fractional CISO
Not really, in most usage. "Fractional CISO" and "vCISO" (virtual CISO) both describe the same underlying role: part-time, ongoing security leadership. The terms get used somewhat interchangeably across the industry. What actually matters isn't the label, it's whether the engagement includes ongoing operational ownership, board reporting, vendor management, incident readiness, or is really just periodic advisory hours dressed up with a CISO title.
What to check instead of the label
Some providers use "vCISO" to mean a lighter, advisory-only relationship, a few hours a month of guidance, while reserving "fractional CISO" for a deeper, ongoing operational role. Others use the terms identically. Since there's no industry-standard line between them, the useful question when evaluating any provider is what's actually included: is it ongoing ownership of the program, board and executive reporting, vendor and audit management, and incident response readiness, or is it advice on request?
My own engagement, published as Fractional CISO & Security Program Leadership, is the ownership version: I hold the program, not just advise on it, for organizations that need it now and can't hire it full time.
Questions
Usually not. Both terms describe part-time, ongoing security leadership, and the industry uses them somewhat interchangeably. What matters is whether the engagement includes ongoing operational ownership or just periodic advisory hours.
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Tell me what's going on and I'll send back a written scope before anything is committed.