LIMITED POWER OF ATTORNEY
The undersigned, for the undersigned and in the undersigned's name, place
and stead, in any and all capacities, including, but not limited to, the
undersigned's individual capacity and the undersigned's capacity as an officer,
director, employee or stockholder of GTT Communications, Inc., a Delaware
corporation (the "Company"), hereby constitutes and appoints each of Jay R.
Schifferli, Jocelyn M. Arel and Cheryl M. Fiorenza, signing singly, and with
full power of substitution, re- substitution and revocation, the undersigned's
true and lawful attorney-in-fact to:
(1) prepare, act on, execute, acknowledge, publish (including website
posting) and deliver to and file with the Securities and Exchange
Commission, any and all national securities exchanges and the Company the
following forms with respect to securities of the Company, including those
which are or may be deemed to be beneficially owned or held by the
undersigned: (a) Form ID, Form 3, Form 4, Form 5, Schedule 13D, Schedule
13G and Form 144 under the Securities Exchange Act of 1934, as amended, the
Securities Act of 1933, as amended, and the rules and regulations
thereunder, and (b) any successor form or any related document, in each
case including all amendments of each thereof and any attached documents;
and
(2) do and perform any and every act and thing 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 in such attorney-in-fact's
discretion.
In connection with the appointment of such attorney-in-fact, the
undersigned hereby grants to each such attorney-in-fact, acting singly, 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, in each case in the opinion of such attorney-in-fact,
as fully to all intents and purposes as the undersigned might or could do if
personally present, with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact, or such attorney-in-
fact's substitute or 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 or Regulation 13D-G of the Securities Exchange Act of 1934, as
amended. The undersigned hereby agrees to indemnify the attorney-in-fact and
the Company from and against any demand, damage, loss, cost or expense arising
from any false or misleading information provided by the undersigned to the
attorney- in-fact.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file such forms 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 the date set forth below.
Date: April 20, 2015 /s/ Michael T. Sicoli
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Michael T. Sicoli
