Medical Mutual, an American mutual health insurance company, completed the acquisition of ESI Employee Assistance Group, an employee assistance program provider. Financial terms were not disclosed. “Employee assistance programs are opportunities for employers to support the overall health and wellness of their employees. We know from our existing customers the value employers see in these programs. ESI is a leader in this area. The programs they offer are best in class,” Rick Chiricosta, Medical Mutual Chairman, President and CEO.