In 2014, Kajetanowicz competed in the FIA ERC for the first time with a broader program, having competed in eight rounds of the series. The LOTOS Rally Team driver collected 100 points and finished fourth in the overall standings. 

In 2015, Kajetanowicz won the FIA ERC crown for the first time. He started his route with a commanding win in the Janner Rally where he crushed the opposition. He also showed good pace a month later, during the wintery rally Liepaja-Ventspils in Latvia. In his debut in Circuit of Ireland, he finished second, only behind local ace Craig Breen. In May, the Polish driver secured a podium finish in Rally Acores. An important point in the season was Kajetanowicz’s impressive debut on fast gravel stages of Rally Estonia.

In 2016, Kajetanowicz repeated his success from the previous year, winning the European Rally Championship title for the second time in a row. Kajetanowicz’s team - LOTOS Rally Team also triumphed in the Teams' Championships.

The following year he won his third European Rally Championship title. The whole LOTOS Rally Team had to prepare a perfect strategy in order to score the record-breaking third consecutive championship victory. The FIA ERC season consisted of eight rounds and lasted for eight months. The rallies took place in eight different European countries. The competition started in spring, on the volcanic São Miguel Island in the archipelago of the Azores – almost 4,000 kilometers from Poland.

The 2018 season was a debut year for Kajetanowicz in the World Rally Championship (WRC-2). He took part in four rallies: Italia Sardegna, Deutschland, Turkey and Catalunya de España. He formed a crew with Maciej Szczepaniak – a very experienced co-driver who has over 100 World Rally Championship outings under his belt. The LOTOS Rally Team driver gathered experience in new rallies and recorded nine stage wins, finishing the events in seventh, fifth and fourth (twice) positions. He ended the season with fourth place in Catalunya, defeated only by Skoda and Volkswagen factory crews.

The LOTOS Rally Team finished their 2019 World Rally Championship season with five podiums and one victory in seven rallies. Over 1840 competitive kilometres divided into 89 special stages – with 20 stage wins and 52 stage podiums. 28 days spent in rally cars – and almost 40 with testing included. Almost 21 hours of intensive, extremely fast driving against the clock, with end results often decided by fractions of seconds.

In 2020 Kajetan Kajetanowicz and Maciej Szczepaniak competed in the WRC-3 category. Although the COVID-19 pandemic affected the LOTOS Rally Team plans, Kajetanowicz and Szczepaniak recorded another success, scoring a podium position in the championship standings for the second time in a row.

In 2021 Kajto recorded six podium places including three first places in Croatia, Portugal and Greece. At the end of the season he claimed second position in the WRC-3 standings. 

Kajetan Kajetanowicz and Maciej Szczepaniak have enjoyed a spectacular 2022 season, impressing with an excellent pace that resulted in a great success rate. The Polish crew wrapped up six podium places in seven events, scoring runner-up spots in Estonia and Spain, second positions in Croatia, Portugal, and New Zealand, and a spectacular victory in Rally Safari.