Converting Job titles abbreviations to upper cases

I tried using a simple function which worked, such as

iff(<Job Title>='CEO', 'Chief Operating Officer', <Job Title>)

I was wondering if there is a way of converting these string within the text, rather than replacing value only if the text = to abbrevations.

for eg;- if a user has a job tilte as CEO/CFO, this would be converted to Chief Operating Officer and Chief Financial Officer.

I think there is a way of doing so with web services, is there a way of doing so through workflows ?