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John Martens - QM/QS-Auditor, Technische Aufsichtsperson, Technical Surveyor - Dienststelle Schiffssicherheit, BG Verkehr | XING
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John Martens, Ph.D., M.B.A., P.E., CFEI - Office Director and Principal Engineer - Electrical Engineering and Computer Science | Exponent
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John Martens, Ph.D., M.B.A., P.E., CFEI - Office Director and Principal Engineer - Electrical Engineering and Computer Science | Exponent
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