H&R Block, the $3.9 billion tax service provider,named Jeffrey Brown CFO and senior vice president.Brown has served as acting CFO since Becky Shulmanleft the Kansas City, Mo.-based company at the end of April. Brown,51, had been H&R Block's corporate controller since 2008.Earlier, he was assistant controller of a subsidiary, H&R BlockManagement, and before that was director of that unit's corporateaccounting. Brown previously served as controller atBacou-Dalloz.

Nalco, a $3.7 billion water treatment companyin Naperville, Ill., named Kathryn Mikells CFO andexecutive vice president. She replaces Brad Bell,who is retiring. Mikells, 44, is currently CFO of UAL Corp., theparent of United Airlines, and will begin her new job when United'smerger with Continental is final. Before being named CFO of UAL in2008, Mikells served as vice president of investor relations forUnited and before that as treasurer. She joined United in 1994 as afinancial analyst.

Brinker International, the $2.9 billionoperator and franchiser of chain restaurants including Chili'sGrill & Bar and Maggiano's Little Italy, named GuyConstant CFO and executive vice president. He replacesCharles Sonsteby, who left to become CFO ofMichaels Stores. Constant, 45, had been the Dallas, Texas-basedcompany's senior vice president of finance and CFO of Chili's.Since joining Brinker in 2004, Constant has worked in finance,compensation and investor relations.