At Columbia: the Director of Graduate Admissions, per his official title on the web site.
And at CUNY, "Executive Officer" and cc'd the "Assistant Program Officer" of the "Philosophy Program, The Graduate Center, CUNY" - they're right there on the main page - I could not find the equivalent of a "Director of Graduate Admissions".
Still no response, and I have a bout a week left to give an answer to the Canadian school(s), which means, if a positive answer comes from either of those places I have only a week to decide whether to live in Canada or the US next year, and there are so many things to research, like health coverage, job for my wife, etc. etc etc. .... Anyway, at this point this is just becoming a gripe, since there is nothing I can really do about it but wait, I guess ....