Worth at least US$400,000 a year, it is the firm’s first in the facilities management field.
The unnamed customer has over 120,000 locations under management in a range of industries.
ClearStar will provide background screening for the customer's new virtual ID card for people working in healthcare operations.
CEO Vale said of the latest deal: “We also have the opportunity to cross-sell further solutions to these service providers who will already be on-boarded to our platform.
“In addition, this contract expands our footprint within healthcare - and adds to a number of wins or expansions that we have recently received in this core sector. As a result, it has been an encouraging start to 2020 and we remain excited about the opportunities ahead."
The shares were changing hands for 54p each mid-afternoon, up 10%.
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