OSL Insurance Services, Inc. (OISI) is an excess and surplus lines producer, based in Houston, Texas. The Company has exclusive access to write commercial excess liability insurance on behalf of OCIL Specialty, Ltd. (OSL), with a focus on the energy industry. OSL is a Bermuda insurer, eligible to write excess and surplus lines business in the United States. OSL maintains an A- rating from AM Best, and is indirectly wholly-owned by Everen Specialty, Ltd.