Complex sentence: The Moody International Group was a worldwide technical services organization that specialises in services to reduce risk in the oil and gas industry, but also serves clients in power, mining, construction, engineering, chemical, food, and other industries.
Split into simpler sentences: The Moody International Group was a worldwide technical services organization that specialised in services to reduce risk in the oil and gas industry. It also served clients in power, mining, construction, engineering, chemical, food, and other industries.