After recovering, he completed a master's degree in international affairs with an emphasis in national security at the George Bush School of Government and Public Service at Texas A&M University, then taught at West Point as a Social Sciences, and later, an Arabic Language teacher.

On January 15, 2002, LTC Amerine was awarded the Bronze Star Medal with "V" device and the Purple Heart for his actions in Afghanistan.

Lt. Gen. Paul T. Mikolashek, who oversaw the land war in Afghanistan, praised his exceptional courage, dedication to mission, and selfless commitment to his comrades.

While working on the Army Staff in 2012, Amerine was asked to seek the freedom of Bowe Bergdahl after efforts to rescue him had stalled for several years.

Amerine’s team developed a plan to trade Bowe Bergdahl and several Western hostages for Haji Bashir Noorzai.

In 2014 Amerine provided information to U.S. Rep. Duncan D. Hunter (R-CA) to assist the Congressman in preparing legislation to improve U.S. hostage-freeing efforts.

On June 11, 2015 Amerine was one of five people who testified before the U.S. Senate Committee on Homeland Security and Governmental Affairs when it convened a hearing entitled, "Blowing the Whistle on Retaliation: Accounts of Current and Former Federal Agency Whistleblowers.