Before he worked for Robert F. Kennedy’s presidential campaign in Queens before becoming an Assistant District Attorney in Manhattan. When his father fell ill, Kroll took a leave of absence to run family business, which eventually became a three-year introduction to business corruption.1https://www.newyorker.com/magazine/2009/10/19/the-secret-keeper With this experience under his belt, in 1972, he launched J. Kroll Associates, which eventually turned into Kroll, Inc. The business involved rooting out corruption in companies that did much printing, with Kroll keeping a percentage of the savings.
The Foreign Corrupt Practices Act of 1977 generated new lines of business in auditing and compliance, so Kroll opened offices in Paris, Moscow, Sao Paulo, Singapore, and Manilla. The firm also provided political risk and executive protection services.