I, the
undersigned, do hereby make, constitute and appoint Elisha W. Finney and John W.
Kuo, and each of them, my true and lawful attorneys-in-fact and agents, each
with power of substitution, in any or all of my offices and capacities with
Varian Medical Systems, Inc. as shown below, to execute for me and on my behalf
a registration statement on Form S-8 (the “Registration Statement”) and any and
all amendments and supplements thereto, including post-effective amendments,
relating to the Varian Medical Systems, Inc. Second Amended and Restated 2005
Omnibus Stock Plan and to file the Registration Statement, with all exhibits
thereto, and any other documents in connection therewith, with the Securities
and Exchange Commission pursuant to the Securities Act of 1933, as amended, and
the rules and regulations promulgated thereunder, and do hereby grant unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents
and purposes as the undersigned might or could do in person, and ratify and
confirm all that said attorneys-in-fact and agents, or their substitutes, may
lawfully do or cause to be done by virtue hereof.