I don''t discount an MS degree as valuable but if you want to direct the company''s technology you need to know your market and an MS in engineering will not show you how to determine the market for a product. I would say and MS and MBA is the best combination, followed by a BS MBA and experience combination, then followed by strictly an MS degree. An MS degree will make you technically outstanding in a specialty area while an MBA will give you the knowledge to make competent business decisions and deal with people, which will be more helpful in managing a department or business.