Representing the Great Britain Deaf Team, the 15-year-old won two bronze medals at the European Deaf Championships in Dortmund, Germany.
His proud Lanark ASC coach Karen Kelly said: "This is the best swimming achievement Jack's ever accomplished.
"For a junior swimmer to get two bronzes at a senior championships is truly remarkable.
"Everyone thought this meet would be a learning curve for Jack but he did exceptionally well and exceeded all expectations, a credit to himself and his club.
"Lanark members have won Scottish Championship medals in mainstream swimming, but I'm especially proud that Jack has obtained medals at European level. It is a real landmark for the club."
Jack, the youngest male in the British team, was also named top junior male performer at the championships, amazing considering that there were 22 countries represented at this prestigious meet.
He was the only Great Britain team member to win an individual medal.
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