The last major rebuilding of the organ took place in 1970 and 1971. New chests, structure and many new pipes were made for the chancel divisions. The Gallery and Celestial organs were cleaned and releathered, and the entire instrument was tonally finished by Donald M. Gillett of Æolian-Skinner. This was the final project completed by the company, which ceased operations in 1972. The Organ comprises 168 stops, 225 ranks and 12,422 pipes and is tonally unchanged since 1971.
During the Spring of 2006, a new, movable five-manual and pedal console was installed. Custom built by Harris Organs, Inc. of Whittier, California and designed to harmonize visually with St. Bartholomew’s chancel furnishings, the new console incorporates many stylistic and dimensional elements common to consoles built by Æolian-Skinner, while taking advantage of developments in electronic technology to offer organists vastly greater flexibility in controlling the tonal resources of this massive musical instrument. With its cabinetry of fumed solid quarter-sawn white oak and polished mahogany, the new console is a fitting addition to the architecture of the church. The console has been given in memory of Robert Brimberg.
St. Bartholomew's organ may be regarded as the final development in the tonal evolution of the American Classic organ, as conceived and built by Æolian-Skinner. In the clear and articulate ensembles throughout the instrument, the skillful inclusion of the romantic voices and orchestral stops in the E. M. Skinner work and with the fine ranks from Hutchings and Odell, the organ stands as a monument which lends itself with ease to the many demands of the program of the church.