The Army JROTC program was established at White Mountain Regional High School in September 1995 as part of the United States Army Cadet Command JROTC Expansion program. The Army JROTC program at White Mountains Regional High School is one of only two Army JROTC programs in the entire state of New Hampshire.

The JROTC program at the WMRHS began under the Leadership of Major (Retired) Timothy McKeever and Sergeant First Class (Retired) Rich Elliott. In 1996, Lieutenant Colonel (Retired) Douglas Norvell took over as the Senior Army Instructor (SAI) replacing Major McKeever. In 1997, Sergeant Major (Retired) Ann Miller replaced Sergeant First Class Elliott as the Army Instructor (AI). From 2003 to 2004, Lieutenant Colonel (Retired) Robert Mollenario took over as the SAI replacing Lieutenant Colonel Norvell. In 2005, Lieutenant Colonel (Retired) Darrel Gearhart assumed the position of Senior Army Instructor and retired in 2021. In 2009, Sergeant Major Miller was replaced by Sergeant Major (Retired) Michael Bruno as the Army Instructor who is currently serving in the position. In 2021, Lieutenant Colonel (Retired) Peter Russo took over as the JROTC Senior Army Instructor.

The mission of JROTC is to “Motivate young people to become better citizens.” JROTC is a citizenship and character development course designed to instill values, confidence and discipline in high school students. The core curriculum includes essential classes that focus on helping students succeed in high school and prepare them for life following graduation. Some of the classes that are taught include communication skills, how to prepare a resume and write essays, how to prepare and deliver an effective presentation, leadership principles and practical leadership application, basic first aid, map reading and land navigation, financial planning, college preparation, democracy and the American system of government, and diversity. In addition to the basic core curriculum, JROTC encourages students to lead a healthy, drug-free lifestyle. We emphasize team work as our key to success. The JROTC program offers seven optional team events that students can elect to participate in to encourage team building. The teams include Drill, Rifle, Raider Challenge, Robotics, Academic & Leadership teams, and the Color Guard. Students spend a great amount of time planning, coordinating and carrying out community service projects. We believe that it is our civic duty to give back to our community.