Linn joins from UK onshore shale firm Third Energy and he has previously held senior positions at Lasmo, Cairn Energy, Tullow Oil, ROC Oil, and with Afren during its restructuring.
He is a qualified chemical engineer and lives in Ireland.
“The opportunity to lead the commercialisation of an oil and gas field with the potential of Barryroe is very compelling,” Linn said.
“I look forward to working with the board to bring new investment into the project to ensure value creation at the earliest opportunity.”
Providence chairman Pat Plunkett added: “I am pleased that Alan has agreed to join Providence at this time of significant opportunity within the company.
“He has the ideal mix of operational and strategic experience for the position, and will bring valuable insights to the board as we rebuild the business after the challenging past year.
“Alan recognizes the considerable potential of the company’s assets, in particular Barryroe, and I am sure he will enhance our options in taking this exciting project to the next stage. I look forward to working with him in the coming years.”