Does a 100-person company need a CIO?
A 100-person company usually needs CIO-level leadership, but rarely a full-time CIO. At that size technology spend, security risk and compliance obligations are real, yet the strategic workload is often a fraction of a full-time role. A fractional CIO plus a capable MSP or IT manager is common; regulated, data-heavy or fast-scaling companies may justify a full-time hire.
The real question: who owns technology decisions?
Headcount alone does not decide this. The question is whether anyone in your company is clearly responsible for technology strategy, IT spend and cybersecurity risk, and has the expertise to make those calls.
In many 100-person companies the answer is split: the CFO owns the budget, an IT manager or MSP owns operations, and nobody owns risk. That gap tends to show up during an audit, a customer security questionnaire, a failed project or an incident.
Signs you need CIO-level leadership now
- Customers or regulators ask for security attestations, policies or compliance evidence you cannot easily produce
- You are selecting or replacing an ERP, CRM or other core system
- IT spend is growing but no one can explain the roadmap behind it
- You rely on one outside vendor and have no independent view of its performance or security
- Leadership is making decisions about AI tools and company data without a policy
- You are planning an acquisition, a new site, or rapid hiring
Why governance does not scale down
NIST's Cybersecurity Framework 2.0 treats governance, meaning strategy, roles, policy, supply chain risk and oversight, as a core function for organizations of any size. A smaller company does fewer of these activities, but it cannot skip them.
CISA's guidance for MSP customers is also explicit that outsourcing IT does not absolve executives of risk management responsibility. If you outsource operations, you still need someone who can direct and oversee that provider.
When full-time makes sense
A full-time CIO is easier to justify when technology is central to your product, you run a large internal IT team, you operate under heavy regulation, or you have a sustained pipeline of major projects. Otherwise, fractional leadership gives you the same judgment for the hours you actually need, and can help you define the full-time role when the time comes.
A practical first step
Start with an independent assessment of your current environment: systems, spend, vendors, security controls and compliance obligations. The result should be a short list of risks and decisions ranked by business impact, plus an estimate of how much executive time they will require over the next year.
That estimate answers the original question better than a headcount rule. If the work fills a few days a month, fractional leadership fits. If it fills most of every week for the foreseeable future, plan for a full-time hire and use fractional support to bridge the gap.
Common follow-up questions
Is an IT manager enough for a 100-person company?
Sometimes, if the company has low regulatory exposure and stable systems. But an IT manager is usually hired to run operations, not to set multi-year strategy or own enterprise risk. Pairing an IT manager with fractional CIO oversight is a common middle path.
What does a CIO do that a CFO cannot?
A CFO can own the budget and vendor contracts. A CIO brings the technical judgment to evaluate architecture, security controls, system choices and vendor claims. Without that expertise, financial leaders often must rely on the vendors whose proposals they are judging.
Should the CIO role be combined with security (CISO)?
At around 100 people, it commonly is, with one leader owning both technology strategy and security governance. Compliance-heavy companies, such as defense suppliers or regulated life-science firms, may need dedicated security or compliance expertise alongside that leader.
LAN Service Group provides IT strategy and fractional CIO-style leadership for small and mid-size businesses, alongside managed IT and compliance services when operations also need support.
Talk to LAN Service Group (888) 281-7243