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Our Comprehensive Assessment & Short-term Treatment (CAST) program was founded with the philosophy that all adolescent residential treatment should be considered a respite. It is a chance for the family and other stakeholders to catch their breath, and then evaluate what is working and what is not. From this point of reflection, we develop a plan of care that can enable the adolescent to succeed in the least restrictive, community-based setting that is possible.


CAST thoroughly evaluates a student's strengths and needs during a 60-to 90-day residential placement. The program serves adolescent males who range from 11 to 21 years old. CAST assessments rely on psychological testing and extensive clinical interviewing with students, their families, and their collateral contacts. This enables our clinical team to form connections with students and then present findings in a developmental, bio-psycho-social, and holistic framework. The CAST clinical team will develop individual treatment plans for students and deliver clinical mental health treatment, which includes crisis intervention that is based on the student's needs.

Our clinical team assesses students for depression, ADHD, behavior/conduct disorder, substance abuse, anxiety and trauma, sexual behavior, and fire-setting behavior. CAST’s clinical team can support assessments outside this standard battery if requested by the referring agency or external treatment team members.

CAST students reside on Mount Prospect Academy's main academic campus in Plymouth, N.H., were we maintain a 3:8 ratio of caregivers to students. MPA permanency coordinators work closely with student families and community stakeholders to coordinate home visits for students during treatment.

Students are enrolled in MPA's academic program, which is a certified special education facility that awards high school credits. Academics are a core element of all MPA treatment plans, and a student's sending school district is considered a critical stakeholder in our program. 

CAST One Page Program Description

Meet Our Leadership

Rachel Umberger

Executive Director

Rachel earned her bachelor's degree from UNH and then her master's degree in Clinical Mental Health Counseling from Plymouth State University. She graduated from PSU in 2013 and has worked at Becket since then. As the Executive director of CAST, she is responsible for oversight of all service delivery in the program.


Rachel is a licensed clinical mental health counselor in the state of New Hampshire. She is passionate about serving students and working to ensure that each student and family in the program is afforded a comprehensive and holistic assessment which reflects their needs and strengths. Outside of work, she enjoys spending time with her family and friends, cat and dog, doing yoga, and playing flag football. 

Andrew Mangan

Program Manager

Andrew has a strong desire to help others, and he prides himself in having put forth his very best effort in each of his previous positions with Mount Prospect Academy.


Andrew describes himself as a hard worker with excellent communication skills and an abundance of patience.

He earned a bachelor's degree in physical education and applied health fitness from Plymouth State University. After graduating from PSU in 2010, he stated working as a teacher's assistant with Mount Prospect Academy. Andrew served in numerous roles with MPA, and he was promoted to a weekend supervisor role in August 2013. He became a program manager in August 2014. He is responsible for day-to-day operations and student well-being at the CAST.