Adsync has DoD contracts to support logistics and maintenance of hypobaric altitude chambers used for training aviators. We have multiple 65-year old hypobaric altitude chambers used by USAF and USA. The viewports are no longer in compliance with current edition of ASME PVHO-1 Series specifications. Need structural design engineer/consultant to assist with researching viewport specifications of PVHO-1 Series to design replacement for the existing 1952-1959 era annealed plate glass viewports with annealed acrylic. Must be able to interpret PVHO specifications and design a framing assembly (carbon steel or aluminum), identify gasket/seal types, and mount-mating of PVHO-compliant acrylic viewports into the framing assemblies.