Officer in Charge

How are you using them, exactly? Why are they grouped?

The hyphens are used if it's a part of an official title, e.g. Detachment Officer-in-Charge, Assistant Officer-in-Charge, Officer-in-Charge of Aircraft Intermediate Maintenance Detachment Sigonella.

There is no single rule or custom governing hyphenation of job titles. It is necessary to ascertain the appropriate local custom.

Thanks, InfraBlue and contrex.