The Conservatory's Professional Development Division was established to provide a professionally intensive three-year college level training program in theatre, music, and dance study. Classes include Music History/Listening, Music Theory, Group Singing, Solfege, Class Piano, Choral Singing, Theatre History (play based), Voice Class, Acting, various workshops in related drama and theatre areas, Ballet, Modern, and workshop programs in Tap, Jazz, and Musical Theatre technique. Some classes are also held in the evening throughout the program. Students are required to take all classes if they wish to earn Trinity College, London. diplomas.

Students may opt to earn diplomas in the following areas: Speech and Drama, Musical Theatre, Voice, and/or Recital. There are three diploma levels: Associate, Licentiate, and Fellowship. Students in the Professional Development program must earn the Associate Diploma (first level Diploma) in Speech and Drama followed by the Licentiate Diploma (second level Diploma) in Speech and Drama. It will take three years to complete both diplomas. If a student wishes to take the Associate Diploma in Musical Theatre, they usually do this in the second year of study. Also, students may elect to take the Voice graded or Diploma levels if they are prepared to do so. This program develops the skills needed in today's complex world of theatre and to prepare the total performer or "triple threat."

The Conservatory is an associated institution of Trinity College, London. both in graded and diploma examinations. Students in the Professional Development Division work towards the Trinity diplomas in Speech and Drama and/or Music. These professional diplomas are recognized in over fifty countries throughout the world, and for those qualified undergraduate students who do not choose to include the academic component of a degree program, the Trinity diplomas are the perfect opportunity to participate in an intensive program of theory, practice, and performance in their chosen field. The Trinity College, London diplomas are accredited by the Qualifications and Curriculum Authority (QCA) of Great Britain and have been placed in their National Qualification Framework at the undergraduate and graduate levels. In the United States, the Trinity diplomas are equivalent to advanced undergraduate and graduate credit. For example, the ATCL is valued at 60 advanced undergraduate credits in the subject of the diploma. In many American conservatories there are those students who wish to pursue their art intensively, which then prepares them for professional careers. The breadth, depth, and rigor of these programs are the same, or in many cases exceed, the performance requirements of a degree program, although entrance requirements are identical. The Professional Development Division and Trinity College, London have associated to provide this unique program for the serious student wishing to pursue his/her art on the professional level. The Professional Development Division provides students 18 years and older an alternative to attending traditional college while still earning an international post-secondary credential..

Students in the Professional Development Division have the unique upportunity to perform with the Baltimore Actors' Theatre in their performance activities at Oregon Ridge. BAT has year-round productions in both children's and adult theatre that allow the Professional Development student the chance to use the skills developed in the program in a professional arena. Rehearsals and performances for these productions are an integral part of the learning process and are expected of the Professional Development student. As well, the Conservatory produces two concerts a year in which all professional Development students participate. Professional Development students have a full resume of their Oregon Ridge activities when they complete the program.

Applicants should arrange an inverview/audition to determine their eligibility. Past experience and training are taken into consideration in acceptance and placement of the qualified applicant. Classes are kept small to afford each student individual attention. The Professional Development Division is a unique opportunity for those who desire professional training and performance culminating in an internationally recognized diploma in Speech and Drama and/or Music from Trinity College, London.