The financial analyst who nine years ago discovered Bernard Madoff's multi-billion dollar ... fraud scheme today lambasted US securities officials who ignored his warnings, calling for a shakeup of the US securities and exchange commission's structure. Harry Markopolos, a Massachusetts financial analyst who since 2000 several times sought to alert the SEC to Madoff's fraud, told a House of Representatives committee that the agency should replace its lawyer-heavy enforcement staff with senior securities professionals who have years of industry experience and can understand cutting-edge financial instruments used by hedge fund traders. He said regulators should give fraud investigators a pay incentive to unearth large fraud, and eliminate the turf wars that he said kept New York-based regulators from heeding tips he fed to the Boston office. Markopolos discovered Madoff's alleged malfeasance in May 2000, after he became suspicious of his years-long record of success in all market conditions. Markopolos said it took him about five minutes perusing Madoff's marketing materials to suspect fraud, and another roughly four hours to develop mathematical models to prove it. He eventually delivered a detailed case to securities regulators in Boston and followed up several times over the next eight years as he continued to gather evidence. He said that important SEC officials in New York and Boston brushed his reports aside. In testimony before members of the House financial services committee, Markopolos described an abject failure by the regulatory agencies we entrust as our watchdog".