No, you'll need to meet certain prerequisites and one is to be serving in a position.
AR 611-75, Management of Army DiversSection II
Combat Diver
2–15. Combat diver ratingAll divers must graduate from a Combat Diving Qualification Course (CDQC) conducted by USAJFKSWCS, Key`West, FL; the U.S. Navy Special Warfare Center (NAVSPECWARCEN) Coronado, CA; or other USASOC-approved diver training course.
a. Enlisted combat divers will be awarded either ASI W7 or W9.
b. Combat diving officers will be awarded ASI 4W before designation as a diving officer.
c. Diving Medical Officers (DMOs) will be appointed by the USASOC command surgeon. (Individuals selected for DMO training and assignment should be qualified officers in the Medical Corps or Medical Specialist Corps)
d. Diving Medical Technicians (DMTs) will be awarded ASI Q5.
e. Combat diving supervisors will be awarded ASI S6.
2–16. Selection criteriaIn order for an individual to attend the CDQC, he must successfully complete the qualification criteria in paragraph 2–18 and must be one of the following:
a. A male commissioned officer who holds a SC in one of the following series: 11, 18, 60, 61, 62, or 65.
b. A warrant officer with MOS 180A (Special Forces warrant officer).
c. An enlisted member in CMF 11 or 18.
d. A male military service academy or Reserve Officer Training Corp cadet.