Since the early ‘70s the speaker has benefited from interacting with John Anderson in various contexts, as John has taken on increasingly ambitious roles – e.g., assistant professor (and quick study) at Cornell, respected colleague in membrane science and technology, corporate consultant (and hired-gun), valued friend, and now academic big shot. John has left marks on the profession and on the many individuals he has influenced that are as indelible, full of potential, and unmistakable as the damage tracks in his first track-etched membranes.