The 19-year-old finished top of the tournament's scoring charts by netting six goals, as Villa lifted the trophy for a record sixth time.
Aston Villa's Harry McKirdy
While the senior team may still be reeling from an utterly miserable relegation from the Premier League, Ben Petty's young guns went some way to lifting the gloom around Villa Park by beating West Ham United 2-0 in the final of the competition, claiming the title for a sixth time.
McKirdy, appearing at his third HKFC Sevens, was a central figure in the team's triumph, netting six goals, including a strike in the final.
And the Stoke-born striker believes his previous experiences in the Far East helped to give him the edge this time around.
"In the past two years I didn't get as much playing time but I had a more important role this year," he said.
"I came into it this year with the experience of how to manage the games and how it is played.
"To come and win it with such a young team was amazing.
Aston Villa fans with a banner before the match
"The players and the staff were brilliant and we got the mentality spot on. We got what we deserved."
With Villa now preparing for their first season in the second tier of English football since 1987, McKirdy's impressive showing in Hong Kong may well see him stake a stronger claim for a place in the senior side.
Aston Villa fans protest with banners
Aston Villa fans