Complex sentence: Over the course of her career, Evans worked for several publishing firms and literary agencies, including Coward-McCann and Lippincott (now Lippincott Williams & Wilkins), and these positions frequently took her overseas, expanding her network of colleagues and collaborators.
Split into simpler sentences: Over the course of her career, Evans worked for several publishing firms and literary agencies, including Coward-McCann and Lippincott (now Lippincott Williams & Wilkins). Evans's journalistic career frequently took her overseas, expanding her network of colleagues and collaborators.