A PhD is not all that useful for a practicing engineer.
You know the old joke you continue to learn more and more about less and less until you know everything about nothing.
What it will do for your career is make your understanding of the undergraduate material in your area of expertise almost letter perfect. You will know how to approach almost every problem and will know how to solve that problem in the most efficient and effective manner.
Of course so does a few years experience in the area.
A Master’s is most likely the highest degree necessary or desirable for a practitioner. You can expect a two for one return on the time spend in a master’s program in advancing your career.
Thus a 2 year master plus 2 years experience will put you about on par with someone with 6 years experience. Going the extra 2 years for a PhD will put you at the ten years experience level in six years. Since on the job performance starts to account for more than total years experience by that time the effect is largely blunted.
About all that a PhD will accomplish is give you some additional letters to add behind your make and make you more marketable. This might be an advantage to a consultant especially one who wants to have a narrow specialty. As an employee it doesn’t make that much difference since any potential employer would be sacred of losing you to a university position or some other higher profile position.
A PhD would also limit you to your area of study. You would be too knowledgeable in that area to be used as a generalist, so if you became an engineer because you like to build things then a PhD would take you out of the field and out of project management and into an office specialist role. (That of course may be just what you want so it works both ways.)
If you want a PhD because of some burning desire to become more knowledgeable in your field then go for it but if it is simply a career move then I wouldn’t recommend it.
Rick Kitson MBA P.Eng
Construction Project Management
From conception to completion