Gupta was speaking as his firm completed the acquisition of former Tata Steel plate making facilities at Dalzell and Clydebridge in Lanarkshire, Scotland, on Thursday.
The deal involved a back-to-back transaction in which the Scottish government acquired the two plants from Tata Steel and immediately sold them to Liberty House.
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"We're very pleased to announce that we have completed the deal to acquire Tata's plate mills in Scotland and we now look forward to continuing to work with local management and the workforce to re-build these great businesses in the months ahead," he said.
Scotland's First Minister Nicola Sturgeon said the government was "grateful to Liberty" to take up this "exciting opportunity in Scotland and for the energetic and speedy manner in which they worked with the Scottish government to help save these jobs".
"It has been a team effort which has paid off and once again the steelworkers of Scotland will produce world class products from Lanarkshire," added Scottish business minister Fergus Ewing.