[JURIST] Bunny Greenhouse, the former top procurement official with the US Army Corps of Engineers, has said she plans to sue the Army for being demoted after accusing Halliburton of contract abuse [JURIST report]. Greenhouse was demoted from the senior executive service Saturday to a lower-ranking job, which the Army Corps of Engineers has said was due to Greenhouse's "unacceptable performance." Greenhouse's lawyer and several Democratic lawmakers have called for a Pentagon investigation into the "highly suspect" dismissal. In June, Greenhouse testified [PDF statement] at a Senate Democratic Policy Committee hearing and alleged that there was government favoritism in the awarding of contracts to Halliburton [corporate website] subsidiary Kellogg Brown and Root (KBR) [corporate website] and that KBR overcharged the government for goods and services. In a letter to Defense Secretary Donald Rumsfeld Monday, Sen. Byron Dorgan (D-ND), Sen. Frank Lautenberg (D-NJ), and Rep. Henry Waxman (D-CA) said that "Retaliation against employees for providing information to Congress is illegal and entirely unacceptable." Greenhouse's lawyer has said that a federal lawsuit will be filed next month that alleges racial, sexual and whistle-blower discrimination. Reuters has more.