Oswald is presumably employed in Optics & Design, working with Burt. He was referenced by Burt in Defiant Jazz (12:38):

MILCHICK: I have something for you.

BURT: The missing 7199-G. Oswald will be so delighted. I, too, am delighted.

Nothing else is known about Oswald, though he may be involved in the production, distribution, or usage of the Ideographic Cards.