In his early 30s, Guillermo Lopez walked into finance as an outsider. “Nobody was giving me a chance in finance because I was an engineer,” he tells us. Then a boss took “a risk” and moved him into a finance role—partly because he was “good with numbers,” and partly because his consulting background meant he could be put “in front of…external parties,” Lopez tells us.
That entry point set the tone for how he builds a career: intentionally and with breadth. At American Express, he moved across businesses and finance roles on purpose, because “it’s important to get breath, especially if you’re thinking about a CFO,” he tells us. Over time, he came to describe himself as “very data driven”—the “non emotional part of the decision making,” he tells us—while also learning to make decisions with “imperfect information” in global roles, he tells us.
A later inflection arrived after Visa acquired Tink. Lopez became “the grown up” Visa sent to Stockholm, commuting from London each week, he tells us. The environment was smaller, faster, and short on big-company support. It was “daunting,” he tells us, but it taught him to move quickly, focus on priorities, and take bigger career risks.
That same blend—speed and discipline—shows up in his definition of finance’s strategic role: being embedded in investment and capital-allocation decisions with data in hand, Lopez tells us.
His proof point comes from an earlier chapter. In an international CFO role, he helped reframe how a business allocated “close to $700 million a year,” building ROI insights that pointed to “$30 million more of revenue every year,” he tells us.
