prE-professional training

for post-doctoral fellows, graduate externs, and undergraduate students.

undergraduate internship

Fall 2025 + spring 2026

This two-semester internship is a unique opportunity for highly motivated undergraduate students to gain comprehensive clinical training and direct clinical experience working with children with selective mutism (SM). Additional intern responsibilities include: setting up treatment sessions, performing data entry, observing live treatment sessions of Parent-Child Interaction Therapy (PCIT), collaborating with graduate-level Therapists and Staff on research and program development projects, and assisting with technology projects (e.g., preparing video clips, generating social media posts). Undergraduate interns are required to volunteer a minimum of 10 hours each week. Applicants must have demonstrated experience working with children and be able to commit to the full training program, including: serving as a Counselor for at least one of our after-school, in-person group therapy programs. This is a competitive internship, and we will only accept 1-2 interns for the Fall 2025 + Spring 2026 cycle. Applications will be reviewed on a rolling basis. Interested and qualified applicants are encouraged to complete the application form below. Once your application is complete, our team will reach out to you to schedule an initial 30-minute interview.

clinical psychology externship

july 2025 - june 2026

externship At a glance:

  • Externs will receive training and supervision in conducting semi-structured diagnostic evaluations. Externs will also receive training and supervision in preparing comprehensive evaluation reports.

  • Externs will receive training in and opportunities to deliver evidence-based treatments, including: Parent-Child Interaction Therapy (PCIT), PCIT Adapted for Selective Mutism (PCIT-SM), Exposure and Response Prevention (E/RP), Cognitive Behavioral Therapy (CBT), and Dialectical Behavior Therapy for Children (DBT-C).

  • Externs will have the opportunity to serve as the primary therapist for individual therapy and parent-based treatments. Externs may also be involved in customized intensive treatment programs. These tailored intensives typically involve 4-6 hours of treatment per day across multiple days. Externs may also provide school- and home-based interventions when clinically indicated.

  • Externs will have opportunity to co-lead group therapy sessions for children with social anxiety and selective mutism and for children with emotional sensitivity. Externs will also serve as Lead Counselors for our Mighty Mouth Kids (MMK) intensive group behavioral therapy programs (offered several times a year; ranging from 1-day to 5-day programs).

  • Externs will receive 1 hour of individual supervision and 1 hour of group supervision each week. Supervision also occurs in-vivo in the co-therapy and group therapy context, allowing Externs to meet live-supervision requirements. Additional supervision is also available by way of the Director of Clinical Training’s open-door policy.

  • Externs may assist with presentations to professional and community groups. Externs may also have the opportunity to participate in research and conference presentations. Depending on the individual Extern’s level of experience and comfort on the subject area, their role can vary from simply observing to taking the lead as the presenter.

This year-long externship in Clinical Psychology is designed for advanced graduate students (3rd year and above) in clinical, school-clinical, and school psychology programs. Training will focus on diagnostic assessment and treatment with children, adolescents, and their families using evidence-based treatments for a variety of conditions, including: separation anxiety, selective mutism (SM), social anxiety disorder, generalized anxiety disorder (GAD), attention-deficit/hyperactivity disorder (ADHD), and oppositional defiant disorder (ODD). Externs will have the unique opportunity to work towards certification in Parent-Child Interaction Therapy (PCIT) and/or PCIT Adapted for Selective Mutism (PCIT-SM).

Externs are expected to carry 6-10 individual cases (depending on frequency of sessions and case complexity), co-lead social anxiety and selective mutism group therapy sessions, and serve as Counselors for our Mighty Mouth Kids (MMK) intensive group behavioral therapy programs (offered several times a year). At the outset of the externship, Externs will sit in with a licensed Clinical Psychologist during diagnostic evaluations. As they gain experience, they will then go on to complete evaluations independently. Externs will also participate in weekly didactics, case conference meetings, and group supervision for PCIT and PCIT-SM. Our training model includes weekly individual supervision with a licensed Clinical Psychologist and frequent opportunities to observe senior clinicians implement interventions, provide school consultation, and engage in community outreach and program development. Externs will receive 1 hour of individual supervision (in-person) and at least 1 hour of group supervision (in-person or virtual) each week. Our Director of Clinical Training has an open-door policy and makes herself available to the extent that her schedule allows. Much of the Extern’s supervision will also happen in-vivo in the co-therapy and group therapy context, allowing Externs to meet live-supervision requirements.

We seek highly motivated and experienced graduate students who are interested in developing specialized skills in cognitive-behavioral treatment. Qualified applicants will have familiarity with and some applied experience in delivering one or more manualized treatments (e.g., Coping Cat, Unified Protocol for Children and Adolescents, Parent Management Training) or other evidence-based treatments (e.g., Exposure and Response Prevention (E/RP), Cognitive Behavior Therapy (CBT), Motivational Interviewing (MI)).

To apply, please submit the following as a single PDF to hello@squareonenyc.com: (1) cover letter addressed to Zohra Chahal, PhD; Director of Clinical Training, (2) current CV, (3) eligibility letter, and (4) two letters of recommendation.

Interviews will be held by invitation and scheduled on a rolling basis. Applicants can select an in-person or virtual interview. Interviewees should expect to spend approximately 30 minutes in an interview and will then have time to meet with current Externs, Staff, ask questions, and take a tour. During the interview, the applicant should be able to speak about their clinical experiences, discuss one case, and demonstrate why they feel they are a good fit for our program.