No one formally owns security
IT fights fires, but there is no risk owner and no prioritized agenda.
On-demand cybersecurity leadership
CISO as a Service to decide, prioritize and protect better
Executive cybersecurity leadership for organizations that need strategy, governance and follow-through without hiring a full-time CISO just yet.
Direct answer
What is CISO as a Service?
It is a cybersecurity leadership function engaged with flexible dedication (also called vCISO, virtual or fractional CISO). A senior professional leads the security program: connects leadership with IT, turns technical risk into decisions and follows through until actions are completed.
It is not just an assessment: it is an ongoing governance cadence that supports execution of the agreed program.
Signals
When does CISO as a Service make sense?
The board or regulators want answers
Risk reports, current policies and control evidence are required.
Customers demand assurance
Security questionnaires, contract clauses or ISO/IEC 27001 readiness.
Growth in cloud, SaaS and AI
More vendors, more shared data and a larger attack surface.
There was an incident or near miss
Response needs structure, lessons learned and prevention.
Transition to an in-house CISO
Immediate leadership while the permanent role is defined, recruited or prepared.
Backed by credentials
Chief Information Security Officer (CISO) certification
Rubén Castillo's credential is publicly verifiable in the Panamerican Business School registry.
VerifyBenefits
Why organizations choose this model
Immediate expertise
Senior leadership from the first weeks, without long hiring processes.
Proportional cost
You pay for the dedication your business risk justifies, not a fixed structure.
Independent view
An external perspective, free from internal bias, with cross-industry practices.
Scalable
Dedication and scope adjust to maturity, projects and incidents.
Six capabilities
A compact service, fitted to business risk
Scope combines only the capabilities you need.
Risk management
Scenarios, critical assets, controls and treatment prioritized by impact.
Compliance
Gaps, controls and evidence for ISO/IEC 27001, NIST CSF and applicable requirements.
Security policies
Practical guidelines, owners, exceptions and periodic review.
Monitoring governance
Metrics, alerts, escalation and oversight of SOC or vendors.
Incident management
Readiness, roles, executive communication, exercises and lessons learned.
Continuous training
Security culture and role- and exposure-based training.
Comparison
In-house CISO, CISO as a Service or one-off consulting
| In-house CISO | CISO as a Service | One-off consulting | |
|---|---|---|---|
| Dedication | Full time | Flexible and agreed | Limited to the project |
| Investment | Salary, benefits and structure | Fee proportional to scope | Price per deliverable |
| Start | Recruitment process | Immediate after assessment | Depends on the project |
| Perspective | Deep, but internal | Independent and cross-industry | Specialized in one topic |
| Continuity | Permanent | During the contracted period | Ends with the deliverable |
| Best for | Highly complex organizations | Growing SMEs and mid-size firms; transitions | Bounded needs |
Methodology
From assessment to executive follow-through
A short, repeatable, evidence-driven sequence.
01
Assess
Context, critical assets, threats, current controls and obligations.
02
Prioritize
Risk map, pending decisions and a budgeted roadmap.
03
Execute and support
Owners, committees, vendors and unblocking actions.
04
Report and improve
Indicators, executive dashboard, lessons and plan updates.
Deliverables by scope
Risk mapRoadmapExecutive dashboardPolicies and plansSecurity committeeBoard report
Engagement levels
Three levels of support
Dedication and fees are defined after a diagnostic conversation.
Essential
- Assessment and roadmap
- Essential policies
- Monthly follow-up
- Quarterly executive report
Professional
- Everything in Essential
- Regular security committee
- Vendor and monitoring governance
- ISO/IEC 27001 or NIST CSF readiness
Executive
- Everything in Professional
- Recurring presence with leadership
- Executive lead during incidents
- Board and regulator reporting
Clear boundaries
Strategic leadership does not mean unlimited promises
Included
- Leadership, governance and risk prioritization
- Coordination of IT, vendors and business units
- Compliance preparation and support
- Executive communication and reporting
Requires specific engagement
- 24/7 SOC/MDR monitoring
- Forensics and technical containment (DFIR)
- Penetration testing
- Certification or legal opinion
Security essentials: CISO as a Service in seven ideas
Short takeaways to understand the model before you hire it.
FAQ
The essentials before you hire
What is CISO as a Service?
On-demand cybersecurity leadership to govern risk, strategy and results without initially creating a full-time position.
Are CISO as a Service, vCISO and virtual CISO the same?
In practice, yes: they are names for the same external cybersecurity leadership model with flexible dedication. What matters is the agreed scope, cadence and deliverables.
What is the difference between an in-house and an external CISO?
The in-house CISO is permanently dedicated. The external CISO works with agreed dedication, an independent perspective and flexible scope.
Is it suitable for an SME?
Yes, if the company depends on technology, handles sensitive information or needs to organize its risks without yet sustaining a permanent CISO.
How does it support ISO 27001, NIST or other requirements?
It identifies requirements, gaps, controls, evidence and owners. It does not replace certification or legal advice.
Does it replace the IT team?
No. The CISO sets priorities and risk criteria; IT and vendors implement and operate the controls.
Does it cover on-premises, cloud and artificial intelligence?
Yes, from a strategy and governance standpoint. For AI use it can be complemented with CAIO as a Service. Technical configuration and operations are included only if in scope.
What happens if there is an incident?
The CISO coordinates escalation, communication and decisions. Containment and forensics require contracted technical capabilities.
How much does it cost?
It depends on size, complexity, obligations, maturity, dedication and deliverables. A quote follows a diagnostic conversation.
What reports does leadership receive?
Risks, roadmap progress, actions, incidents, vulnerabilities, third parties, compliance and pending decisions.
How is confidentiality protected?
With confidentiality agreements, least-privilege access, secure information handling and documented exit rules.
Contact
Let's turn your risks into an executive agenda
Tell us about your context. An initial conversation helps define whether this model fits and what dedication makes sense.
Emaillando@landohouse.com
WhatsApp+502 4211 3673
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