DocuSign Envelope ID: 9CCC399F-0550-45C9-B6DE-9EF7B7A61F90
Substitute Power of Attorney
Pursuant to written powers of attorney (each a Power of Attorney) by the
individuals listed below, the undersigned, Maryanne R. Lavan, has been
constituted and appointed the lawful attorney-in-fact and agent of the
individuals, with full power of substitution and re-substitution, to execute and
  file documents with the Securities and Exchange Commission pursuant to Section
  16 of the Securities Exchange Act and Rule 144 of the Securities Act of 1933,
with respect to equity securities of Lockheed Martin Corporation and with such
further powers as specified in each Power of Attorney.
Individual
Date of Power of Attorney
Daniel F. Akerson
January 24, 2020
David B. Burritt
January 24, 2020
Timothy S. Cahill
September 30, 2022
Bruce A. Carlson
January 24, 2020
John M. Donovan
October 26, 2021
Joseph F. Dunford, Jr.
February 10, 2020
James O. Ellis, Jr.
January 24, 2020
Thomas J. Falk
January 24, 2020
Ilene S. Gordon
January 24, 2020
Stephanie C. Hill
June 11, 2020
Vicki A. Hollub
January 24, 2020
Jeh C. Johnson
January 15, 2020
Maryanne R. Lavan
January 16, 2020
Robert M. Lightfoot, Jr.
December 15, 2021
Jesus Malave, Jr.
February 2, 2022
H. Edward Paul III
June 6, 2022
Debra L. Reed-Klages
November 1, 2019
Evan T. Scott
June 6, 2022
Frank A. St. John
January 16, 2020
James D. Taiclet
January 24, 2020
Gregory M. Ulmer
November 29, 2020
Patricia E. Yarrington
June 3, 2021

In accordance with the authority granted under each Power of Attorney, including
  the power of substitution, the undersigned hereby appoints John E. Stevens as
a substitute attorney-in-fact, on behalf of the individuals listed above, with
the full power of substitution, to exercise and execute all of the powers
granted or conferred to the undersigned in each Power of Attorney.
For the avoidance of doubt, the foregoing appointment shall not serve as a
revocation of the powers granted to the undersigned herself in each Power of
Attorney.
This Substitute Power of Attorney shall remain in full force and effect unless
and until revoked by the undersigned.
IN WITNESS WHEREOF, the undersigned has caused this Substitute Power of Attorney
  to be executed as of June 27, 2023.
Signature:
Name: Maryanne R. Lavan