Русско-англо-русский юридический словарь

The working class (also labouring class and proletariat) are the people employed for wages, especially in manual-labour occupations and in skilled, industrial work. (Wikipedia)

In the processing sector, it is reckoned 52 per cent of the unskilled workforce, 44 per cent of the skilled workforce and 16 per cent of supervisory and management staff are non-UK nationals. (The Scotsman)

However, a great divorce attorney brings more than just a knowledge of the law to the table. A great divorce attorney is a skilled negotiator who focuses on what is most important to you and your children. They help come up with creative solutions to meet each of your needs while minimizing the cost, complexity and collateral damage from divorce. (Forbes)

skilled labour: labour or work that demands skill and which you usually have to be trained for, or the workers that provide this labour (Collins English Dictionary)