First Wave MRO acquired by Tray Siegfried and Jon Werthen. Oklahoma Aerospace Maintenance, Repair and Overhaul firm. December 17, 2012 Posted by Matthew Bristow in Mergers & Acquisitions December 17, 2012. First Wave MRO, Inc. enters into Agreement to sell its assets to a newly-formed entity, owned by Tray Siegfried and Jon Werthen. The Company was advised by ClearRidge.