| Base and line maintenance: | Groton (Groton-New London) |
| Base and line maintenance: | Citation 500/501 |
| Citation 550/551 | |
| Citation 560 | |
| Citation 560XL |
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| Columbia Air Services | U.S.A. | Maintenance |
| Columbia Aircraft Sales | U.S.A. | Aircraft Sales |
| Columbia Aircraft Sales | U.S.A. | Aircraft Sales/Acquisition |
