OSHA does not require, but recommends, that CPR training be part of a first aid program.
However, some OSHA standards (e.g., logging operations (1910.266); permit-required confined spaces (1910.146); and electric power generation, transmission, and distribution (1910.269)), require employees be trained in first aid and CPR.
If an employer is covered by one of these specific standards, CPR training would be required.