![Gary Martz](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Gary Martz
Director/Board Member at
Greif U.S. Holdings, Inc.
Net worth: 8 M $ as of 31/05/2026
Profile
Gary R.
Martz currently serves as Secretary & Director at Greif U.S.
Holdings, Inc., Director at The Open Group LLC, Member-National Council at Michael E.
Moritz College of Law, Member-Leadership Circle at One Columbus, and Trustee at Dawes Arboretum.
Former roles include President at Soterra LLC from 2005 to 2013, Partner at Baker & Hostetler LLP, and Executive Vice President at Greif, Inc. in 2025.
Education includes undergraduate studies at the University of Toledo (Ohio) and graduate studies at Michael E.
Moritz College of Law.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
GREIF INC CLASS A 0.38% | 29/12/2025 | 95,056 ( 0.38% ) | 6 M $ | 31/05/2026 |
GREIF INC CLASS B 0.13% | 29/12/2025 | 28,100 ( 0.13% ) | 2 M $ | 31/05/2026 |
Gary Martz active positions
| Companies | Position | Start |
|---|---|---|
Greif U.S. Holdings, Inc.
 Greif U.S. Holdings, Inc. Containers/PackagingProcess Industries Manufactures containers and packaging systems | Director/Board Member | - |
Dawes Arboretum
 Dawes Arboretum Other Consumer ServicesConsumer Services Dawes Arboretum is a nearly 2,000-acre protected natural haven and accredited tree museum dedicated to the conservation of trees, nature, and history. The private company is based in Newark. The arboretum maintains detailed plant records, conducts evaluations for ornamental quality and disease resistance, and participates in seed exchange programs for scientific and conservation purposes. It offers diverse educational programs for youth, families, and adults, including hands-on, standards-based field trips, classroom outreach, and professional development workshops for educators. The site also preserves historical collections related to the Dawes family and features landmarks such as the Daweswood House Museum and archive. Dawes Arboretum supports its mission through memberships, donations, volunteering, and legacy giving, providing benefits such as free admission and event discounts. Employment opportunities range from seasonal to full-time positions with comprehensive benefits and professional development programs. Founded in 1929 by Beman and Bertie Dawes, it originated from a 140-acre farm and has grown to encompass over 16,000 living trees and shrubs, including four nationally accredited plant collections such as maple, dawn redwood, buckeye, horse-chestnut, and witch-hazel. | Director/Board Member | - |
The Open Group LLC
 The Open Group LLC Miscellaneous Commercial ServicesCommercial Services Provides program and consortia management information services | Director/Board Member | - |
One Columbus
 One Columbus Miscellaneous Commercial ServicesCommercial Services Engages in promotion of economic development | Corporate Officer/Principal | - |
Michael E. Moritz College of Law
 Michael E. Moritz College of Law Other Consumer ServicesConsumer Services Functions as a College/University | Corporate Officer/Principal | - |
Former positions of Gary Martz
| Companies | Position | End |
|---|---|---|
| GREIF, INC. | Chief Administrative Officer | 07/05/2015 |
Soterra LLC
 Soterra LLC Forest ProductsNon-Energy Minerals Operates timber tract | President | 01/05/2013 |
Baker & Hostetler LLP
 Baker & Hostetler LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services | Corporate Officer/Principal | 01/01/2002 |
Training of Gary Martz
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
50
1st degree connections
9
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 9 |
|---|---|
Greif, Inc.
 Greif, Inc. Containers/PackagingProcess Industries Provides industrial packaging products and services | Process Industries |
Greif U.S. Holdings, Inc.
Greif U.S. Holdings, Inc. Containers/PackagingProcess Industries Manufactures containers and packaging systems | Process Industries |
Soterra LLC
Soterra LLC Forest ProductsNon-Energy Minerals Operates timber tract | Non-Energy Minerals |
Baker & Hostetler LLP
Baker & Hostetler LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services | Commercial Services |
University of Toledo (Ohio)
 University of Toledo (Ohio) Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The Open Group LLC
The Open Group LLC Miscellaneous Commercial ServicesCommercial Services Provides program and consortia management information services | Commercial Services |
Michael E. Moritz College of Law
Michael E. Moritz College of Law Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
One Columbus
One Columbus Miscellaneous Commercial ServicesCommercial Services Engages in promotion of economic development | Commercial Services |
Dawes Arboretum
Dawes Arboretum Other Consumer ServicesConsumer Services Dawes Arboretum is a nearly 2,000-acre protected natural haven and accredited tree museum dedicated to the conservation of trees, nature, and history. The private company is based in Newark. The arboretum maintains detailed plant records, conducts evaluations for ornamental quality and disease resistance, and participates in seed exchange programs for scientific and conservation purposes. It offers diverse educational programs for youth, families, and adults, including hands-on, standards-based field trips, classroom outreach, and professional development workshops for educators. The site also preserves historical collections related to the Dawes family and features landmarks such as the Daweswood House Museum and archive. Dawes Arboretum supports its mission through memberships, donations, volunteering, and legacy giving, providing benefits such as free admission and event discounts. Employment opportunities range from seasonal to full-time positions with comprehensive benefits and professional development programs. Founded in 1929 by Beman and Bertie Dawes, it originated from a 140-acre farm and has grown to encompass over 16,000 living trees and shrubs, including four nationally accredited plant collections such as maple, dawn redwood, buckeye, horse-chestnut, and witch-hazel. | Consumer Services |
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