What is a fractional Chief Health Officer?
A fractional Chief Health Officer is a part-time executive role that owns one leader's health the way a fractional CFO owns a company's finances. One person tests the body, builds the plan across movement, food, sleep and stress, and stays accountable for it week after week, without being a full-time hire.
The fractional CFO, applied to the body
A growing company rarely needs a full-time CFO. It needs someone senior who owns the numbers, sees the whole picture and is accountable when something drifts. So it hires one for part of the week. That is a fractional CFO.
The person running the company has the same gap, in the one asset nobody schedules. Every other asset gets a dashboard, a review and someone accountable. The body carrying all of it gets none.
A fractional Chief Health Officer fills that seat. One person, accountable for the system that decides how much energy you bring to the next decision, and whether your body holds for the next twenty years.
Why the seat exists: it was never knowledge
Every founder I meet can already recite the list. Sleep eight hours. Lift three times a week. Protein at breakfast. Everybody knows it, and people are still getting sicker. So knowing is not the mechanism.
He is not undisciplined. He is disciplined somewhere else. He gets up at five for the board deck and holds a payroll together. That discipline points at everything that has a deadline and someone watching. The body has neither. It cannot be hired for, outsourced or bought back later.
The body cannot be delegated. The system around it can be owned. That is the role.
Who it is for, and who it is not for
- Founders, CEOs, directors, partners and principals, usually 40 and over.
- People whose decisions carry other people's livelihoods.
- Leaders who are winning at work and quietly notice the body is no longer winning.
- People who have tried apps, programs and retreats, and found none of it built for the load they carry.
- Anyone chasing abs and an after-photo.
- Anyone who wants daily hype or a guru.
- Anyone weighing this against a gym membership.
- Anyone who wants peptides, gadgets and more complexity.
- Active clinical cases. Your doctor comes first.
What the seat does: four pillars, in a fixed order
There are four hundred things you could do. We have four. Always in this order.
- Movement. Strength that holds for the next twenty years: three strength sessions a week, Zone 2 cardio, daily walking. Programmed against your body and your calendar.
- Real Food. Protein-anchored, three meals, no counting. A way of eating that survives the client dinner and the airport.
- Sleep. A fixed wake time, a cold dark room, the phone out of it. The recovery layer that decides tomorrow's decision quality.
- Stress. The load is the job and it is not going away. The work is discharge and recovery, built into the calendar itself.
Everyone gets the same four. Nobody gets the same ninety days. A man training four times a week on five hours of sleep does not need a better program. He needs the pillar he is hiding from. So the work begins where it is actually broken, not where it feels like progress.
The other half of the job is the bad week. The real failure is never the missed session. It is the three days after it, when the gym goes, then dinner, then bedtime. On a bad week the plan gets smaller, sleep and food get tighter, and there is no restart. There is the next meal. Holding the other three on purpose is the skill the whole thing rests on.
How it differs from the alternatives
Your doctor diagnoses and treats disease. A fractional Chief Health Officer does neither. The work runs the four pillars between appointments and supports clinical care, never substitutes for it. Anything that needs a test, a diagnosis or a prescription goes to your physician.
A trainer runs sessions in a gym. That is one pillar, for one hour. This role owns all four, plus the travel, the dinners, the bad weeks and the measurement. Training is part of the work, not the whole of it.
Company programs are built for the average employee: the same challenge, the same app, the same talk for everyone. This seat is built for one person, one body and one calendar, and it starts where that person is actually broken.
A clinic is built around testing: a detailed snapshot, a few times a year. Data has real value. But the result is decided by what happens on an ordinary Tuesday, and a test cannot notice that. This role is there for the Tuesday.
An app or an AI will hand anyone a decent program for free, and that is now true forever. It still cannot test a body, pick the route, or notice on a Tuesday when nobody is watching. The method is the structure. The work is choosing the route and being there for it.
How an engagement works
Fifteen minutes. Three sharp questions, a straight read on your biggest leak, and an honest answer on fit, both directions.
Nothing is written before something is measured. Anchor lifts, left against right, sleep and step baselines, and how you actually feel, because a feeling is a measurement. Then a personal protocol across the four pillars, built for the travel, the dinners and the board weeks. Delivered within seven days.
Structured check-ins, direct access between them, adjustments against your data. The same tests are run again later. If a number has not moved, the plan was wrong, and the plan changes. Not the person.
What it promises
Nothing. We measure instead.
The outcome is the point: more energy, and a body that holds for the next twenty years. The work aims straight at it. It never promises it, in any form, because nobody can promise what a body will do. Tested numbers on day one, the same numbers on day ninety. The movement standards are ratios, left against right and posterior against quad, so a man in a hotel room with no barbell still gets a real finding.
Who is Cassio Oliveira?
Cassio Oliveira is the founder of One Life and works as a fractional Chief Health Officer for founders and executives. He is Brazilian, based in Nouméa, New Caledonia, and works in English, Portuguese and French with clients across more than eight countries.
He runs three businesses: One Life, BACI Pasta & Pizza in Nouméa, a restaurant that burned down and was rebuilt, and a hospitality portfolio between New Caledonia and Brazil. Three languages, five time zones, a family. He lives the calendar he works with.
The formal depth underneath: more than fifteen years with high performers, Level 4 Personal Training in Australia, the country's highest qualification, formal grounding in sports science, clinical experience in Chinese medicine, advanced nutrition certifications and CF-L2. Featured in Brainz Magazine.
Questions people ask about the role
What is a fractional Chief Health Officer?
A fractional Chief Health Officer is a part-time executive role that owns one leader's health the way a fractional CFO owns a company's finances. One person tests the body, builds the plan across movement, food, sleep and stress, and stays accountable for it week after week, without being a full-time hire.
Is a fractional Chief Health Officer the same as a fractional Chief Medical Officer?
No. A fractional Chief Medical Officer is usually a physician who advises a company on clinical matters, such as a health product or a clinical service. A fractional Chief Health Officer works on one person: the founder or executive the business runs on. It does not diagnose or treat disease. It runs movement, food, sleep and stress as one system, alongside that person's own doctor.
How is it different from a personal trainer?
A personal trainer runs sessions, which is one pillar. A fractional Chief Health Officer owns all four pillars, the week between the sessions, the travel, the bad weeks and the measurement. Training is part of the work, not the whole of it.
Do I still need my doctor?
Yes. The work supports clinical care and never substitutes for it. Anything that needs a blood test, a diagnosis or a prescription goes to your own physician.
How much time does it take?
It is built around the calendar you already have. Training sessions run 45 to 60 minutes and check-ins take minutes. If time were the fix, you would have fixed this already.
Does it promise results?
No. Nobody can promise what a body will do. The outcome, more energy and a body that holds for the next twenty years, is what the work aims at. Instead of a promise there is evidence: tested numbers on day one and the same numbers on day ninety.
What does it cost?
It is a serious engagement, priced accordingly, and the number is stated plainly on the call. One number, no games, no pressure.
How do I start?
With a 15-minute diagnostic call. Three questions, a straight read on the pillar costing you the most, and an honest answer on fit in both directions.
Find out where it is actually broken.
Three sharp questions, a straight read on the pillar costing you the most, and an honest answer on fit, both directions. If it is a wrong fit I say so and point you somewhere better.
Book the 15-minute diagnostic →Fifteen minutes. Three sharp questions. A straight read and a clear next step, either way.
This page describes a role and a way of working. It is not medical advice. If you have a diagnosed condition or are under a doctor's care, speak to them before changing how you train, eat or sleep.