Mosman Oil and Gas (LSE:MSMN) Appoints New CEO

2 min read | September 29, 2025 07:18 PM AEST | By Team Kalkine Media

Mosman Oil and Gas (LSE:MSMN) Appoints New CEO — Image source: © 2025 Krish Capital Pty.Ltd

Board Update

Alongside the CEO appointment, Mosman announced adjustments to its leadership structure. Carl Dumbrell, who was previously Chairman, will now serve as Executive Chairman. Andrew Scott, formerly a Non-Executive Director, will move into the role of Executive Director.

Management Commentary

Carl Dumbrell, Executive Chairman of Mosman, stated:
"We are delighted that Howard has agreed to become Mosman's CEO. His personal investment in Sagebrush and his long-standing commitment to Mosman since 2017 make him the ideal person to lead the Company. Over the coming months we will reach important milestones, including the start of 3D seismic over Sagebrush in October and the extended well test on Sagebrush-1 in Q4. Together with progress at Coyote Wash, these steps mark the beginning of an exciting new chapter for Mosman. With an independently verified helium resource and a clear pathway to development, the Company is well positioned for future value creation and we move forward with confidence."

Upcoming Milestones

According to the company, two operational milestones are expected in the near term:

Launch of 3D seismic work at the Sagebrush Helium Project in October 2025.
Extended well test at Sagebrush-1 scheduled for the fourth quarter of 2025.

These steps form part of Mosman’s focus on advancing helium and hydrocarbon projects in the United States.

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