Operate and maintain site-critical systems and equipment that supply the facility with heat, utility and conditioned water, ventilation, air conditioning and other environmental and critical systems in accordance with diagrams, operating manuals, industry best practices, and manufacturers specifications. Such requirements may include, but are not limited to, completion of a customer-provided weapons qualification program, successful completion of customer-directed medical screening, and fulfillment of any additional training, certifications, or evaluations as required by the customer.