Joseph D. Hammer
Chief Executive Officer at Expion Energy Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 1 year
- Director since
- 2025
1 year of board service in total across 1 board, counting each seat separately. Longest: Expion Energy Inc., 1 year.
Chief executive roles
Outstanding · grade A+
Out of 100, from shareholder return, dividends, growth and acquisitions.
Partial: only 20% of the scoring weight is on file.
- Revenue growth 20%
- 100
71.6% a year in revenue
20% of the scoring weight is on file. Figures cover December 2024 – December 2025.
Questions about Joseph D. Hammer
What boards is Joseph D. Hammer on?
Joseph D. Hammer sits on the board of Expion Energy Inc.
Has Joseph D. Hammer been a CEO?
Yes — Joseph D. Hammer was CEO of Expion Energy Inc. (2025 – 2026).
How long has Joseph D. Hammer served on boards?
Our records show at least 1 year of board service across 1 board, the earliest from 2025.
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