He also included his rsum, which highlighted that he began his career as a housing analyst at the investment bank Kidder Peabody and later worked for the hedge fund manager Leon Cooperman, who runs Omega Advisors.
Mr. Kass, who said he had never met Mr. Buffett, also supplied him with a list of references of other investors who know Mr. Buffett, including Howard Marks, the chairman of Oaktree Capital Management, and Mario Gabelli, the head of Gamco Investors.
Finally, he asked the CNBC co-hosts Becky Quick and Andrew Ross Sorkin to help get his e-mail to Mr. Buffett. Ms. Quick and Mr. Sorkin, the DealBook columnist, are two of the three journalists who ask Mr. Buffett questions at the meeting.
On Monday morning, in a live CNBC interview with Ms. Quick from La Vista, Neb., Mr. Buffett announced that he had selected Mr. Kass.
"Think of tough questions," Mr. Buffett said to Mr. Kass on the air. "See if you can drive the stock down 10 percent."
Mr. Kass was in his Palm Beach office, preparing for the trading day while CNBC played in the background, when he heard Mr. Buffett make the announcement.
"I was as shocked as everyone else," said Mr. Kass, who grew up in Rockville Centre, N.Y., on Long Island.
He will join two Berkshire "bulls," the insurance analyst Cliff Gallant of Nomura Securities and Jonathan Brandt of Ruane, Cunniff & Goldfarb, on stage at the CenturyLink Center in Omaha.
And even though Mr. Kass will present a negative view on Mr. Buffett's company, he acknowledges that deep down, he is still an unabashed fan.
"I can't wait to take a picture with him," Mr. Kass said.
This post has been revised to reflect the following correction:
Correction: March 4, 2013
An earlier version of this article misstated Doug Kass's investment position in Berkshire Hathaway. He is shorting the stock; it is not the case that he was "not currently" short the company's shares.