Complex sentence: Upon graduation, he joined McKinsey & Company in their Stockholm office, after which he joined numerous consumer companies, including Coca-Cola, AB Frionor (a Norwegian frozen seafood company), and Kodak.
Split into simpler sentences: Upon graduation, he joined McKinsey & Company in their Stockholm office. Afterwhich, he joined numerous consumer companies, including Coca-Cola, AB Frionor (a Norwegian frozen seafood company), and Kodak.