Postgres was compiled/installed from source files rather than yum. And that installation completed successfully. The libpq.so.5 file was present for the local installation, but the same file was missing file from /usr/lib64. In past server setups that /usr/lib64 version is present.

I don't know if the yum install of perl(DBI) or perl(DBD::Pg) has installed it in the past (or another package that isn't immediately obvious), but following your advice I found that the following yum install provided the missing files and fixed the problem 

sudo yum install -y postgresql-libs

[download]

Thanks for your help!

In reply to Re^2: Cannot load Postgres Shared Object by markdibley
in thread Cannot load Postgres Shared Object by markdibley

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