Everything in the plot is a red herring. The real story concerns the heating-up of the Cold War and smuggled chemical warfare materials. Actually, everything you've read up to here is a red herring, too. The Glimmer Man is really about how Seagal's character is some mysterious renegade operative with a CIA background who got bounced from the spy corp. Anyway, after a big fight scene with lots of blood and bullets, the plot grinds to a halt.
Nothing is resolved about the chemical warfare stuff.
The Glimmer Man just stops. And Steven Seagal.