From Defense One:
"There are just a handful of architectural and engineering firms with the organizational capacity to build Trump’s wall. Not the technical know-how—any engineer can design a wall—but rather the experience in management. Marshaling the array of contractors and subcontractors it would take to build a wall across so many different jurisdictions and climate regions would require a fairly elite engineering firm.
None of more than a dozen global architecture and engineering firms I contacted were willing to speak on the record about Trump’s wall. Neither did faculty at the schools of civil engineering for Texas A&M University and the Georgia Institute of Technology. But several sources pointed to codes of ethics that seek to prevent architects, engineers, and planning professionals from doing harm."