Exhibit 99.2

POWER OF ATTORNEY

With respect to holdings of and transactions in securities issued by First Interstate BancSystem, a Montana corporation (the “Company”), each of the undersigned hereby constitutes and appoints Timothy Leuthold with full power of substitution and resubstitution, to act as each the undersigned’s true and lawful attorney-in-fact to:

1. execute for and on behalf of each of the undersigned, Schedules 13D and 13G in accordance with Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules thereunder, and Forms 3, 4, and 5 in accordance with Section 16 of the Exchange Act and the rules thereunder;

2. do and perform any and all acts for and on behalf of each of the undersigned which may be necessary or desirable to complete and execute any such Schedule 13D or 13G or Form 3, 4, or 5, complete and execute any amendment or amendments thereto, and timely file such schedule or form with the SEC and any stock exchange or similar authority; and

3. take any other action 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, each of the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of each 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.

Each of the undersigned hereby grants to each such attorney-in-fact 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, as fully to all intents and purposes as each of the undersigned might or could do if personally present, with full power of substitution and resubstitution or revocation, hereby ratifying and confirming all that such attorney-in-fact substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted.

Each of the undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of each of the undersigned, is not assuming, nor is the Company assuming, any of each of the undersigned’s responsibilities to comply with Section 13 and Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until each of the undersigned is no longer required to file Schedule 13D and 13G and Forms 3, 4, and 5 with respect to each of the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by each of the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

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RISA KAE SCOTT
By:
	/s/ Risa K Scott
	Name: Risa K Scott, as an individual
NBAR5 S
By:
	/s/ Risa K Scott
	Name: Risa K Scott
	Title: Authorized Signatory
RISA K. SCOTT & JOHN HEYNEMAN JR., TTEES FBO RISA K. SCOTT EXEMPTION TRUST UNDER THE SCOTT FAMILY 1996 TRUST
By:
	/s/ Risa K Scott
	Name: Risa K Scott
	Title: Trustee
RISA K SCOTT TTEE RISA K SCOTT TRUST DTD 12/4/15
By:
	/s/ Risa K Scott
	Name: Risa K Scott
	Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

JAMES R. SCOTT
By:
	/s/ James R. Scott
	Name: James R. Scott, as an individual
FOUNDATION FOR COMMUNITY VITALITY
By:
	/s/ James R. Scott
	Name: James R. Scott
	Title: Director
JAMES F HEYNEMAN CONSERVATORSHIP, JAMES SCOTT, CONSERVATOR
By:
	/s/ James R. Scott
	Name: James R. Scott
	Title: Conservator
JAMES R SCOTT TRUST
By:
	/s/James R. Scott
	Name: James R. Scott
	Title: Trustee
JAMES R AND CHRISTINE M SCOTT FOUNDATION
By:
	/s/ James R. Scott
	Name: James R. Scott
	Title: President
JS INVESTMENTS LIMITED PARTNERSHIP
By:
	/s/ James R. Scott
	Name: James R. Scott
	Title: Managing Partner

[Signature page to Scott Family FIBK Shareholder Group POA]

JOHN HEYNEMAN JR.
By:
	/s/ John M. Heyneman Jr.
	Name: John M. Heyneman Jr., as an individual
RAE ANN MORSS & JOHN HEYNEMAN JR., TRUSTEES FBO RAE ANN MORSS EXEMPTION TRUST UNDER THE SCOTT FAMILY 1996 TRUST
By:
	/s/ John M. Heyneman Jr.
	Name: John M. Heyneman Jr.
	Title: Co-Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

RIKI RAE SCOTT DAVIDSON & JOHN HEYNEMAN JR., TRUSTEES FBO RIKI SCOTT DAVIDSON EXEMPTION TRUST UNDER THE SCOTT FAMILY 1996 TRUST
By:
	/s/ John M. Heyneman Jr.
	Name: John M. Heyneman Jr.
	Title: Co-Trustee
TOWANDA INVESTMENTS LIMITED PARTNERSHIP
By:
	/s/ John M. Heyneman Jr.
	Name: John M. Heyneman Jr.
	Title: Managing Partner
JULIE SCOTT ROSE
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose, as an individual
ELIZABETH LAUREN SCOTT ROSE TRUST
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trust Advisor

[Signature page to Scott Family FIBK Shareholder Group POA]

FIRST INTERSTATE BANK & JULIE SCOTT ROSE, CO-TTEES OF THE JOAN D SCOTT TRUST DTD 10/16/12
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
HARPER GRACE SCOTT TRUST
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
HARRISON WILLIAM SCOTT TRUST
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
HOLLAND ELIZABETH SCOTT TRUST
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
IXL LIMITED LIABILITY COMPANY
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Designated member
JULIANA SARAH SCOTT ROSE TRUST
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trust Advisor

[Signature page to Scott Family FIBK Shareholder Group POA]

JULIE A SCOTT ROSE TRUSTEE OF THE JULIE A SCOTT ROSE TRUST DATED 5- 14-2002
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
THOMAS W SCOTT
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
THOMAS W SCOTT TRUST DTD 8/22/95, THOMAS W SCOTT TRUSTEE
By:
	/s/ Julie Scott Rose
	Name: Julie Scott Rose
	Title: Trustee
HOMER SCOTT JR.
By:
	/s/ Homer Scott Jr.
	Name: Homer Scott Jr., as an individual
HOMER SCOTT JR. TRUST DTD 12/4/78
By:
	/s/ Homer Scott Jr.
	Name: Homer Scott Jr.
	Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

SHERIDAN STADIUM FOUNDATION
By:
	/s/ Homer Scott Jr.
	Name: Homer Scott Jr.
	Title: Board President
JAMES R SCOTT JR.
By:
	/s/ James R. Scott Jr.
	Name: James R. Scott Jr., as an individual
FIRST INTERSTATE BANK TTEE FOR DANA S ANDERSSON GST EXEMPT TRUST NO 1 DTD 12/11/2020
By:
	/s/ James R. Scott Jr.
	Name: James R. Scott Jr.
	Title: Authorized Signatory
By:
	/s/ Hanna Wagner
	Name: Hanna Wagner
	Title: Trustee
By:
	/s/ Clarene Westburg
	Name: Clarene Westburg
	Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

FIRST INTERSTATE BANK TTEE FOR James R. Scott Jr. GST EXEMPT TRUST NO 1 DTD 12/11/2020
By:
	/s/ James R. Scott Jr.
	Name: James R. Scott Jr.
	Title: Authorized Signatory
By:
	/s/ Hanna Wagner
	Name: Hanna Wagner
	Title: Trustee
By:
	/s/ Clarene Westburg
	Name: Clarene Westburg
	Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

JONATHAN SCOTT
By:
	/s/ Jonathan Scott
	Name: Jonathan Scott, as an individual
JONATHAN SCOTT AS TRUSTEE OF THE JONATHAN R SCOTT TRUST DATED AS OF 4/21/04
By:
	/s/ Jonathan Scott
	Name: Jonathan Scott
	Title: Trustee
JEREMY PAUL SCOTT
By:
	/s/ Jeremy Paul Scott
	Name: Jeremy Paul Scott, as an individual
JEREMY SCOTT TTEE, JEREMY SCOTT REVOCABLE TRUST DTD 6/25/15
By:
	/s/ Jeremy Paul Scott
	Name: Jeremy Paul Scott
	Title: Trustee
NBAR5 Limited Partnership
By:
	/s/ Jeremy Paul Scott
	Name: Jeremy Paul Scott
	Title: Managing Member
SUSAN S. HEYNEMAN
	/s/ Susan Heyneman
	Name: Susan Heyneman
	Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

JAMES R SCOTT TRUST, JAMES R SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TTEES

/s/ James R Scott

Name: James R Scott

Title: Trustee

JAMES F HEYNEMAN TRUST, JAMES SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TRUSTEES

/s/ James R Scott

Name: James R Scott

Title: Trustee

SUSAN SCOTT HEYNEMAN TRUST, SUSAN HEYNEMAN & FIRST INTERSTATE WEALTH MANAGEMENT CO-TRUSTEES

/s/ Susan Heyneman

Name: Susan Heyneman

Title: Trustee

HOMER SCOTT JR TRUST, HOMER SCOTT JR. & FIRST INTERSTATE WEALTH MANAGEMENT CO TRUSTEES

/s/  Homer Scott Jr.

Name: Homer Scott Jr.

Title: Trustee

JOHN M HEYNEMAN JR. TRUST

/s/ John M Heyneman Jr.

Name: John M Heyneman Jr.

Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]

EXEMPT THOMAS W SCOTT MARITAL TRUST 2

/s/ Julie Scott Rose

Name: Julie Scott Rose

Title: Trustee

/s/ Kim Smith

Name: Kim Smith

Title: Trustee

/s/ Kristin Wilkerson

Name: Kristin Wilkerson

Title: Trustee

[Signature page to Scott Family FIBK Shareholder Group POA]