LIMITED POWER OF ATTORNEY FOR

SECTION 16 REPORTING OBLIGATIONS

KNOW ALL BY THESE PRESENTS, that the undersigned hereby makes,

constitutes and appoints each of Benjamin R. Clouse, signing

singly, as the undersigned's true and lawful attorney-in-fact, with full

power and authority as hereinafter described on behalf of and in the name,

place and stead of the undersigned to:

(1) seek, obtain or maintain filing codes with the United States

Securities and Exchange Commission, including submission of Form ID;

(2) prepare, execute, acknowledge, deliver and file Forms 3, 4, and

5 (including any amendments thereto) with respect to the securities of

CrossFirst Bankshares, Inc., a Kansas corporation (the "Company"), with

the United States Securities and Exchange Commission, any national

securities exchanges and the Company, as considered necessary or advisable

under Section 16(a) of the Securities Exchange Act of 1934 and the rules

and regulations promulgated thereunder, as amended from time to time (the

"Exchange Act");

(3) seek or obtain, as the undersigned's representative and on the

undersigned's behalf, information on transactions in the Company's

securities from any third party, including brokers, employee benefit plan

administrators and trustees, and the undersigned hereby authorizes any

such person to release any such information to the undersigned and

approves and ratifies any such release of information; and

(4) perform any and all other acts which in the discretion of such

attorney-in-fact are necessary or desirable for and on behalf of the

undersigned in connection with the foregoing.

The undersigned acknowledges that:

(1) this Limited Power of Attorney authorizes, but does not require,

such attorney-in-fact to act in their discretion on information provided

to such attorney-in-fact without independent verification of such

information;

(2) any documents prepared and/or executed by such attorney-in-fact

on behalf of the undersigned pursuant to this Limited Power of Attorney

will be in such form and will contain such information and disclosure as

such attorney-in-fact, in his or her discretion, deems necessary or

desirable;

(3) neither the Company nor such attorney-in-fact assumes (i) any

liability for the undersigned's responsibility to comply with the

requirement of the Exchange Act, (ii) any liability of the undersigned

for any failure to comply with such requirements, or (iii) any obligation

or liability of the undersigned for profit disgorgement under Section

16(b) of the Exchange Act; and

(4) this Limited Power of Attorney does not relieve the undersigned

from responsibility for compliance with the undersigned's obligations

under the Exchange Act, including without limitation the reporting

requirements under Section 16 of the Exchange Act.

The undersigned hereby gives and grants the foregoing attorney-in-

fact full power and authority to do and perform all and every act and

thing whatsoever requisite, necessary or appropriate to be done in and

about the foregoing matters as fully to all intents and purposes as the

undersigned might or could do if present, hereby ratifying all that such

attorney-in-fact of, for and on behalf of the undersigned, shall lawfully

do or cause to be done by virtue of this Limited Power of Attorney.

This Limited Power of Attorney shall remain in full force and effect

until revoked by the undersigned in a signed writing delivered to such

attorney-in-fact. This Limited Power of Attorney shall be governed by, and

construed in accordance with, the laws of the State of Kansas, excluding

its conflicts of laws principles.

IN WITNESS WHEREOF, the undersigned has caused this Limited Power of

Attorney to be executed as of this 6th day of December, 2021.

Signature:/s/Rod Brenneman

Print Name: Rod Brenneman

Brenneman Rod 4