Kingsbury, who won the moguls World Cup title last year with eight victories, was triumphant at the season opener in Ruka before finishing third at round two in Kreischberg.
However he ensured he was back on top as the North American leg of the World Cup began in Lake Placid winning a final two that included three home skiers and three Canadians.
Kingsbury produced the best score of 90.16 to take the win with Patrick Deneen leading home three Americans by taking second with an effort of 85.70 on home soil.
Teammates Dylan Walczyk and Bryon Wilson took third and fourth respectively with Kingsbury's compatriots Alexandre Bilodeau, the Olympic champion, fifth and Pascal-Olivier Gagne sixth.
Kingsbury's win sees him regain an outright overall lead at the top of the overall moguls World Cup standings with 260 points with Bilodeau 55 behind in second and Wilson third.
Kearney meanwhile, having opted out of the first two rounds and not competed on the World Cup circuit since the season finale last year, was back in the winning habit in the women's moguls event.
While Kingsbury won the first six World Cup events last season on the way to the overall title, Kearney claimed nine in a row at the start, eventually taking 11, and showed she hasn't lost her talent on home soil.
The 26-year-old Olympic champion took victory after producing a score of 78.43 with Nikola Sudova of the Czech Republic second with 74.53 and Australian Britteny Cox third with 72.06.
Kearney goes in at eight in the overall World Cup standings as Justine Dufour-Lapointe closes the gap on leader Heather McPhie after ranking sixth following a failure to finish final two.
McPhie didn't even make it out of qualifying finishing even behind Britain's Ellie Koyander, who was 29th, in 35th with her lead at the top slimmed down to just 20 points with three rounds complete.