Jeff Prescott, Vice President Joe Biden’s deputy national security adviser, took over this week as the new National Security Council (NSC) senior director for Iran, Iraq, Syria and Gulf states, following Rob Malley’s promotion to NSC Middle East coordinator.

Prescott, who has served as Biden’s deputy national security adviser since 2013 and previously advised him on Asia, started his new NSC job April 29. Colleagues say he has been deeply involved in Situation Room deliberations and interagency deputies committee meetings the past two years on every foreign policy issue in which the vice president has been involved, including Iraq, Ukraine, China and the Western Hemisphere.

“Jeff has been one of this administration's secret weapons,” Jake Sullivan, Biden’s former national security adviser, told Al-Monitor by email. “For the past two years, he's been a key voice in the Situation Room on these issues. More important, he is one of those rare people who can match subtlety of analysis with strength of purpose. That is precisely what our Middle East policy needs right now.”

"Jeff has been a trusted adviser for several years,” Biden said in a statement emailed to Al-Monitor. “He's a critical thinker and creative strategist, a relentless worker, and a decent man. As my Deputy National Security Advisor, Jeff has been deeply involved in shaping U.S. policy in the Middle East. Jeff is leaving my staff but the good news is that he won’t be moving far, and we’ll be able to benefit from his good judgment in his new position.”