KBR Inc. (KBR) said Chief Financial Officer Susan Carter will resign effective Sept. 26 to become CFO of another company.<br /><br />The engineering, construction and defense-services provider didn't name a replacement, nor did it say which firm Ms. Carter is joining.<br /><br />KBR has struggled with weak sales, recording its 16th straight quarter of revenue declines in its second quarter. Defense suppliers across the U.S. are facing an anticipated federal spending curtailment.<br /><br />KBR in July reported its second-quarter earnings fell 13% as it posted decreased revenue in its hydrocarbons and government segments.<br /><br />Shares closed Wednesday at $30.34 and were inactive premarket. The stock has dropped 12% in the past three months.