English to Italian Tech/Engineering Petroleum Eng/Sci

Very little (almost nonexistent) context here, this is taken from a series of example of third party workers covered by a series of regulation of a company (an oil and gas giant):
"This system covers the evaluation, selection and ongoing monitoring of performance of third party service providers:
• Maintenance, Construction and Plant contractors
• Transportation providers
• Third Party terminals and blender/packers (where EM has title to product)
• Environmental, engineering and consulting services
• Joint Ventures where ExxonMobil are not the operator"