POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that I, Kihara Kiarie, hereby
constitute and appoint Daniel L. Woodard, Brandon Sloane and Thomas P.
Conaghan, and each of them, my true and lawful attorneys-in-fact and agents,
with full power of substitution and resubstitution for me and in my name, place
and stead, to sign any Form ID (Uniform Application for Access Codes to File on
EDGAR), reports on Form 3 (Initial Statement of Beneficial Ownership of
Securities), Form 4 (Statement of Changes in Beneficial Ownership of
Securities) and Form 5 (Annual Statement of Beneficial Ownership of Securities)
relating to transactions by me in shares of Common Stock or other securities of
AdTheorent Holding Company, Inc. and all amendments thereto, and to file the
same, with the Securities and Exchange Commission and the appropriate
securities exchange, granting unto said attorneys-in-fact and agents, and each
of them, or their substitutes, full power and authority to do and perform each
and every act and thing requisite or necessary to be done in and about the
premises, as fully to all intents and purposes as I might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents, and each of them, or their substitutes, may lawfully do or cause to be
done by virtue hereof. This Power of Attorney shall be effective until such
time as I deliver a written revocation thereof to the above-named attorneys-in-
fact and agents.


Dated: 02/01/2022                      /s/ Kihara Kiarie
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                                       Kihara Kiarie