...Perenti Global Ltd.'s (Perenti) smaller scale globally, material exposure to West Africa, and indirect exposure to volatile commodity prices from contract mining revenues constrain creditworthiness, in our view. That said, the company may reduce its sovereign risk exposure if it can continue to execute on shifting more of its client base to lower-risk jurisdictions such as Australia, North America and Botswana, from higher-risk West Africa. Offsetting these weaknesses are the company's long track record and operating expertise, conservative financial management, and modestly diversified service offerings that provides some resilience to an industry downturn....