Power of Attorney
(Limited to Execution of Forms 3, 4 and 5)


I, John J. Christmann, do hereby constitute and appoint Rajesh Sharma and
Patrick Whitman (with full power to each of them to act alone) as my true
and lawful agents and attorneys-in-fact with full power and authority to
execute and deliver on my behalf in accordance with Securities and
Exchange Commission rules and regulations all reports of changes in
my beneficial ownership of securities issued by Altus Midstream
Company on Forms 3, 4 and 5 as may be deemed advisable.  I hereby
ratify and confirm all that each such agent and attorney-in-fact
may do by virtue hereof with respect to reports of my beneficial
ownership of securities issued by Altus Midstream Company.

This power of attorney shall remain in full force and effect until
I am no longer required to file Forms 3, 4 and 5 with respect
to changes in my beneficial ownership of securities issued by
Altus Midstream Company, unless earlier revoked by me in writing
delivered to the attorneys-in-fact named above.

In witness whereof, I have duly executed this power of attorney effective
as of this 15th day of November 2018.


/s/ John J. Christmann


State of Texas
County of Harris

On this 15th day of November 2018, before me personally came John J.
Christmann, to me known, and acknowledged this instrument.
Witness my hand and official seal.


/s/ Tanika Law
[Seal for Tanika Law]
[Notary Public, State of Texas]
[My Commission Expires 09-18-2020]