Macleod was the CEO (from 2009 to 2011) of National Semiconductor Corporation (National Semiconductor), an analog semiconductor company, until National Semiconductor was acquired by Texas Instruments Incorporated. Macleod joined National Semiconductor in 1978 and served in a variety of executive positions prior to becoming CEO, including Chief Operating Officer (from 2001 to 2009) and Chief Financial Officer (from 1991 Macleod has previously served as a director (from 2007 to 2019) of Broadcom Inc. (formerly, Avago Technologies Limited), Chairman (from 2012 to 2017) of the Board of Intersil Corporation and Chairman of the Board (from 2010 to 2011) of National Semiconductor. to 2001).