POWER OF ATTORNEY



Know all by these presents, that the undersigned hereby constitutes and appoints

each of Kenneth J. Galaznik and John B. De Luca signing singly, the

undersigned's true and lawful attorney-in-fact to:



(1) execute for and on behalf of the undersigned, in the

undersigned's capacity as an officer and/or director of

American Science and Engineering, Inc. (the "Company"),

Forms 3, 4 and 5 in accordance with Section 16(a) of the

Securities Exchange Act of 1934 and the rules promulgated

thereunder;



(2) do and perform any and all acts for and on behalf of the

undersigned which may be necessary or desirable to complete

and execute any such Form 3, 4 or 5 and timely file such form

with the United States Securities and Exchange Commission

and any stock exchange or similar authority; and



(3) take any other action of any type whatsoever in connection with

the foregoing which, in the opinion of such attorney-in-fact,

may be of benefit to, in the best interest of, or legally required

by, the undersigned, it being understood that the documents

executed by such attorney-in-fact on behalf of the undersigned

pursuant to this Power of Attorney shall be in such form and

shall contain such terms and conditions as such attorney-in-fact

may approve such attorney-in-fact's discretion.



The undersigned hereby grants to each such attorney-in-fact full power and

authority to do and perform any and every act and thing whatsoever requisite,

necessary, or proper to be done in the exercise of any of the rights and powers

herein granted, as fully to all intents and purposes as the undersigned might or

could do if personally present, with full power of substitution or revocation,

substitutes, shall lawfully do or cause to be done by virtue of this power of

attorney and the rights and powers herein granted.  The undersigned

acknowledges that the foregoing attorneys-in-fact, in serving in such capacity

at the request of the undersigned, are not assuming, nor is the Company assuming,

any of the undersigned's responsibilities to comply with Section 16 of the

Securities Exchange Act of 1934.



This Power of Attorney shall remain in full force and effect until the

undersigned is no longer required to file Forms 3, 4 and 5 with respect to the

undersigned's holdings of and transactions in securities issued by the Company,

unless earlier revoked by the undersigned in a signed writing delivered to the

foregoing attorneys-in-fact.



IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney

to be executed as of this 22nd day of May, 2013.



      /s/Michael N. Tropeano

      Michael N. Tropeano