Ahtna USA, LLC
Ahtna USA, LLC (AUSA) is an infrastructure and design-build company that provides construction, engineering, environmental remediation, and facility renovation services nationwide.
West Sacramento Office
- CAGE: 9CQU9
- UEI: QF7JHNKS9T53
Sky Siemers, President
Mr. Siemers brings over two decades of leadership in construction, logistics, and global operations, having served as both President and Vice President in previous roles. He has led complex joint ventures and large-scale projects across multiple countries, managing diverse teams and driving operational excellence. His expertise includes overseeing thousands of personnel and delivering strategic solutions on a global scale. Sky holds an MBA from Louisiana State University, a PMP certification, and has completed a number of executive education programs.
David Frenzel, VP of Operations
Mr. Frenzel has more than 40 years of experience in managing new construction, remodeling, electrical, demolition, environmental clean-up and civil projects. He has managed projects and performed worked as the Project Manager throughout Alaska, Hawaii, Guam, Saipan, and the western United States, with numerous sites located in extremely remote and isolated locations. In these areas, Mr. Frenzel oversaw all aspects of job progress and was responsible for ensuring timely scheduling and delivery of all site necessities as travel to many of these locations was extensive and difficult.
Patrick Royce
Mr. Royce has over 36 years of experience in project management, site supervision, and construction scheduling for projects across the Continental United States, Alaska, and OCONUS locations, with extensive coordination among clients, agencies, subcontractors, and vendors to ensure safe, timely, and compliant project delivery. He spent his first 20 years specializing in sanitary sewer, storm drainage, and water pipeline system improvements before transitioning into federal contracting for the past 16 years. His project portfolio includes a broad range of public and private infrastructure work, including utility system installations, marine construction, and military airfield PCC/HMA improvements.
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