That from a man whose intimidating nickname, Neutron Jack, was earned after he eliminated 100,000 jobs through layoffs, plant closings and the sale of businesses.

But "Neutron Jack" is ready to spill all his alpha secrets.

He earned the nickname "Neutron Jack" for dismissing 100,000 employees in his early days as chief executive.

He earned the nickname Neutron Jack after ordering the layoffs in the 1980's.

The man once known as Neutron Jack for his ability to dismiss employees he saw as unneeded or underperforming, now finds his life the stuff of tabloids.

During the early 1980s he was dubbed "Neutron Jack" (in reference to the neutron bomb) for eliminating employees while leaving buildings intact.

(On Wall Street, he had been dubbed "Neutron Jack" because, it was said, when he took over a company, the facilities remained but the people disappeared.)

He was known as "Neutron Jack" for firing 100,000 workers, and he still lets the "bottom 10 percent" of G.E.'s work force go every year.

Mr. Welch, who was known as Neutron Jack for his tough management style, will teach at the academy and head its advisory board.

Jack Welch of General Electric did not become "Neutron Jack" by handing out cupcakes.