William J. (Joe) Callahan

Senior Project Manager


Drafting/Design, 1991, Dallas County Community College, Dallas, Texas
Engineering Studies, 1989, Dallas County Community College, Dallas, Texas

Areas of Expertise

Fenestrations & Curtain Walls
Air, Moisture, Thermal, and Vapor Barriers
Building envelope design and system selection
Contract document reviews (drawings, specifications, submittals, product data)
General building assessments (remediation, rehabilitation, forensic, etc.)
Quality assurance (site/factory observations and reports)
Testing (air/water laboratory or field testing)
Building Envelope Commissioning (BECx)


Joe joined Pie Consulting & Engineering in 2018 as a Senior Project Manager. Joe specializes in building envelope design, contract document review, general building assessments, quality control observations and testing observations. Joe has extensive experience working with Owners, Architects and General contractors assisting them in selecting cladding systems that are appropriate for their specific project needs when taking into consideration building code requirements, energy code requirements, building type, occupancy of the building and overall performance requirements. Joe is involved in the field during installation of the different cladding systems and testing of those systems as required.

Prior to joining Pie, Joe served as a senior envelope consultant for a large international consulting firm providing building envelope consulting services to building owners, architects and general contractors