ብዙውን ጊዜ የዶክትሬት ዲግሪ ማጠናቀቅ በብዙ መስክ በዩኒቨርሲቲ ፕሮፌሰር, ተመራማሪ ወይም ሳይንቲስት ውስጥ ለቅጥርነት መስፈርት ነው.
The completion of a PhD has been often a requirement for employment as a university professor, researcher, or scientist in many fields.