WASHINGTON — President Biden’s pick to serve as undersecretary of defense for acquisition and sustainment, Michael Brown, has withdrawn his nomination.

Brown is the director of the Defense Innovation Unit (DIU), the Pentagon’s commercial outreach office based in Silicon Valley. 

In a July 13 letter to Defense Secretary Lloyd Austin, Brown said he is dropping out due to an ongoing DoD inspector general investigation into personnel practices at DIU that could last up to a year. 

“While I’m confident the Office of the Inspector General will ultimately find no wrongdoing on my part, I know there are other qualified candidates who can focus on the urgent business of making the acquisition process faster and more cost effective,” Brown said in the letter to Austin. 

Brown’s nomination has been in limbo since Biden tapped him in April. News of Brown’s withdrawal was first reported by InsideDefense. 

Before joining the U.S. government, Brown was the CEO of two public Silicon Valley technology firms, Symantec and Quantum.

Pentagon spokesman John Kirby on July 14 confirmed that Austin received Brown’s letter expressing his desire to withdraw. 

Kirby told reporters that Brown remains in his current post as director of DIU.

Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...