I am a firm believer in Professional Certification as such I hold two (AWS Certified Welding Engineer and AFE Certified Plant Engineer), however the Professional Engineering license is more important (I hold a PE licensed in 9 states).
Following your licensure as a professional engineer, you may voluntarily have their expertise in a specified field of engineering recognized through an appropriate specialty certification program. Note that such certification does not imply that other licensed professional engineers are less qualified for practice in a particular field of specialty.
Remember in the US Professional Engineering licensure is the only qualification for engineering practice. (Check your state to find out what the definition of engineering practice is and what if any exemption may apply. I know this sounds legalese… I am sorry for that, I am not practicing law.) A couple of helpful websites
There are some exemptions in the hazardous material sector. Lead and asbestos removal and abatement require that the personnel performing this work be certified. ( Note: each state and the Federal EPA have there own rules, fees are generally excessive.)
If you desire to
spice up the resume I would suggest taking the
Fundamentals of Engineering Exam, in lieu of certifications. However, several schools that I know sponsor the SME Cmfg. Tech exam, take the exam it is good practice for the FE exam.
Once you get out into industry, and find your niche you can then look seriously at certification.
I agree with Adrian on associations, attend many different association meetings. There is good networking potential. Attending them puts you in front of the engineers you will be working with or may be hiring you. It also gives you a chance to look at them.