Third in the short program and second in the long at the 2012 Russian Championships, the pair won their first senior national medal, silver.

Stolbova/Klimov were originally the first alternates for the 2012 European Championships but Alexander Smirnov had an emergency surgery and was not able to recover in time.

Replacing Kavaguti/Smirnov at the event, Stolbova/Klimov set new personal bests in their short and long program to win their first European medal, bronze.

Stolbova/Klimov won their first senior Grand Prix medal, bronze, at the 2012 Cup of China, and finished 5th at the 2012 Trophée Eric Bompard.

In April 2013, the pair said they wanted to move to Moscow to work with Nina Mozer, who agreed to take them in her group.

After placing sixth in the short program and third in the free skate, they finished fourth overall at the 2013 Cup of Russia behind Canadian pair Kirsten Moore-Towers / Dylan Moscovitch.

At the 2014 European Championships, Stolbova/Klimov placed fourth in the short, first in the free skate, and scored a total of 207.98 points to win the silver medal behind Volosozhar/Trankov and ahead of Bazarova/Larionov.

Stolbova/Klimov decided not to compete at the 2015 World Championships in Shanghai, China, as they wanted to focus on learning new throw jumps.

[citation needed] Stolbova/Klimov started the 2015–16 season competing in a challenger series at the 2015 Ondrej Nepela Trophy where they won the gold medal.

However, they polished their program and elements and won the gold medal in their second Grand Prix at the 2015 Rostelecom Cup ahead of teammates Yuko Kavaguti / Alexander Smirnov.

[13][14] Stolbova/Klimov withdrew from the entry list at the 2016 Russian Championships due to Klimov's allergic reaction from a therapeutic massage a week before nationals.

[15] A nerve problem affected Klimov's arm and shoulder muscles, preventing him from performing lifts.

During a training camp in mid-July 2016, Stolbova developed severe inflammation in her left ankle due to a nerve problem that arose after a change of skating boots.

They returned to competition in late December, winning gold at the 2017 Russian Championships by a margin of 0.93 over Evgenia Tarasova / Vladimir Morozov.

"[20] Following the test skates, Stolbova/Novoselov discard their "I'll Take Care of You" short program in favour of a new one set to "Rebirth" by Hi-Finesse, first seen when they made their competitive debut at the 2019 Rostelecom Cup.