West Midlands Police said Dauda Kamara, 45, is alleged to have committed the offences while employed as a carer for a private company.
A force spokesman said Kamara, of Charles Road, Handsworth, Birmingham, has been bailed to appear before magistrates in Dudley on Wednesday.
The offences - one count of rape and six of sexual assault - are alleged to have taken place between 2008 and 2013.
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