Obtain a high school diploma. Nearly all institutions that confer millwright certificates require you to possess a high school diploma or General Educational Diploma, also known as a GED.
Research the community colleges in your area for millwright certificate programs. Some schools list millwright training certificates under construction trade programs, machinist programs or industrial trade and technology programs. Determine if you are going to attend school part-time or full-time and find schools that match your needs. Most certificate programs require between 32 and 36 credits for completion, and a typical class is usually worth two or three credits.
Review the admissions policy for the institution you select. Some community colleges that offer millwright certificates require you to take a placement exam or submit standardized test scores from your high school (if less than five years old).
Enroll in the certificate program. Some core classes you can expect to take include, drafting, blueprint reading, fundamentals of hydraulics, fundamentals of industrial maintenance, industrial rigging, technical mathematics and metal arc welding.
Attain the minimum GPA required to stay in the program. Many institutions have a 2.0 GPA as the minimum threshold. You must also meet any additional credit hour residency requirements of the certificate program. Once you successfully complete all requirements, you will obtain your millwright certificate.