EnerNOC Inc (ENOC): Amish Mehta’s SQN Investors Makes Big Push Into Stock

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Page 12 of 12 SEC Filing

EXHIBIT A

JOINT FILING AGREEMENT

The undersigned agree to file jointly with the Securities and Exchange
Commission (the “SEC”) any and all statements on Schedule 13D or Schedule 13G and reports on Forms 3, 4 or 5 (and any
amendments or supplements thereto) required under section 13(d) or 16(as) of the Securities Exchange Act of 1934, as amended, in
connection with purchases and sales by the undersigned of the securities of any issuer. For that purpose, the undersigned hereby
constitute and appoint SQN Investors LP, a Delaware limited partnership, as their true and lawful agent and attorney-in-fact, with
full power and authority for and on behalf of the undersigned to prepare or cause to be prepared, sign, file with the SEC and furnish
to any other person all certificates, instruments, agreements and documents necessary to comply with section 13(d) and section
16(a) of the Securities Exchange Act of 1934, as amended, in connection with said purchases and sales, and to do and perform every
act necessary and proper to be done incident to the exercise of the foregoing power, as fully as the undersigned might or could
do if personally present.

Dated: March 2, 2016

SQN INVESTORS (GP) LLC

By: /s/ Scott R. Smith

Chief Financial Officer

SQN INVESTORS LP

By: SQN Investors (GP) LLC

General Partner

By: /s/ Scott R. Smith

Chief Financial Officer

SQN PARTNERS (GP) LLC

By: /s/ Scott R. Smith

Chief Financial Officer

SQN INVESTORS MASTER FUND LP

By: SQN Partners (GP) LLC
General Partner

By: /s/ Scott R. Smith

Chief Financial Officer

SQN INVESTORS FUND LP

By: SQN Partners (GP) LLC

General Partner

By: /s/ Scott R. Smith

Chief Financial Officer

/s/ Amish Mehta

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