I want to be a CFO — Joy Mbanugo on the deliberate path

Joy Mbanugo woke up one morning at Google, looked at the queue of 20 people ahead of her for a CFO seat that might not open for five years, and decided she would build her own path out. She emailed the former CFOs of Walmart, HPE, and Pandora. She joined the CFO Leadership Council, then the Financial Executives Institute's CFO Bootcamp. She left tax for treasury, treasury for an SAP implementation, the implementation for Google Cloud FP&A. By the time ServiceRocket called in 2021, the deliberate path had been five years in the making.

The arc is the spine. Joy did not become a first-time CFO accidentally. She did it the way she does most things — by collecting data, mapping the gaps, and filling them in a specific order. The role she walked into at ServiceRocket is a translation of that discipline. Her working definition of the chair is the opposite of the gatekeeper archetype most finance people grow up inside: a CFO is a servant to the business, the math is forward-looking, and the people work happens before the numbers do.

The deliberate path#

The mentor message was uniform. “No one told me get more accounting experience,” Joy says. “In the path to becoming a CFO, you either are an investment banker, a former controller, or you come through FP&A.” Tax-and-treasury was not on that list, so she rewired. The treasury role at Google was the bridge; the SAP conversion was the door into controllership; cloud FP&A — analyzing $25M to $1B deals — was the credential. She also did the unglamorous parallel work: paid attention to what her then-CFO Ruth Porat said on earnings calls, joined a CFO listserv where VPs and CFOs traded technical issues, and built a panel of mentors that included Black women already in the chair and on corporate boards.

I started telling people at Google like, hey, I want to be a CFO. And I told anybody who would listen to me, didn't care if people laughed.

The willingness to say the sentence out loud, repeatedly, is the part that gets missed. Joy was repeatedly asked “why do you think you can be a CFO?” She had the data ready every time.

Servant to the business#

Joy’s modern-CFO frame is built on one borrowed line. “A CFO should look at themselves as a servant to the business. You are there to enable the business and you are there to be a great partner.” That sounds like a LinkedIn closer until you watch what it changes in practice. Sales gets a partner, not a referee. Growth gets a co-conspirator on ROI questions. The CEO gets a data-fluent counterpart, not a budget warden. Joy’s CEO at ServiceRocket, Rob Castaneda, is an engineer who built reports himself when he didn’t have a CFO; her job is not to take the spreadsheet away from him but to bring the cross-functional view he can’t build alone.

A CFO should look at themselves as a servant to the business. You are there to enable the business and you are there to be a great partner.

The servant frame is also the answer to the “do I say no a lot?” question. Joy says yes, regularly. But saying no is a sub-task; the actual job is unblocking.

Where AI lands#

Joy is at the operational edge of the AI-in-finance question, not the theoretical one. The ambition she names is concrete: one tool that walks from pipeline (HubSpot or Salesforce) through forecasting, cash management, and AR/AP without manual handoffs across five disconnected systems. Until that tool exists — and she suspects it won’t be one tool, it’ll be a stack of smarter ones — the operating answer is either a strong engineering team that can stitch the systems together or a finance team that can write good prompts.

For the modern CFO, data is everything. AI is all around us. Before it was, do you know SQL? Now it's, can you write a good prompt for ChatGPT or Bard?

The training Joy is building for her team — a ChatGPT/Bard specialist coming in to teach safe usage without proprietary data leakage — is the version most CFOs will end up running. The hard part isn’t access. It’s the data-handling discipline that comes with it.

Speak up — the deliberate pattern again#

The same data-collection discipline shows up in Joy’s advice for women in finance, and it’s the closer of the conversation. “People will ask you, why do you think you can do this?” The answer that worked for her was not confidence — it was preparation. Mentors gathered, data points logged, plan drafted. The skeptical question becomes a Q&A you’ve already aced. The cost most women pay, in her account, is internalizing the skeptical comment and ruminating. The discipline is refusing to.

I would just encourage women to speak up. You have to have already gathered the data and intel, and not care what they say.

It’s the same instruction as the career arc itself. Decide the destination, collect the data, do the work, and don’t carry other people’s doubts as your own.

What to listen for#

The full episode runs the longer Cleveland-to-London-to-San Francisco arc inside EY, the BlackRock securities-lending year, the ServiceRocket onesie that arrived before Joy had even signed (the CEO’s character tell), and a sharp set on community building and Black women on corporate boards. Joy’s three-word descriptor — Fun. Ambitious. Caring. — lands as advertised. Listen at /podcast/ep-009-joy-mbanugo; for the other AI-in-finance essays in the catalogue, see David Junius and Harsh Joshi, or /topics/ai-in-finance.