In April 2022, Nkrumie ran a new personal best time of 10.28s to win silver in the under-20 100 metres at the
2022 CARIFTA Games. At the
2022 World Athletics U20 Championships in August 2022, Nkrumie was a double silver medallist. He finished second in the 100m, running a new national junior record time of 10.02. He later also won silver as part of the Jamaican relay team. On 29 March 2023 at the ISSA Boy’s and Girl’s Championship, he ran a new personal best of 9.99s for the 100m at the national stadium in Kingston. This made him the first Jamaican junior in history to run under 10 seconds. He also became only the third junior in history to break the 10-second barrier, after
Letsile Tebogo (9.91s) in 2022 and
Trayvon Bromell (9.97s) in 2014. Speaking after the event Nkrumie said that despite the time he had not executed his technique perfectly and felt he could go faster. He won the silver medal over 100 metres at the
2023 Pan American U20 Athletics Championships in
Mayagüez, Puerto Rico, in August 2023. He ran 10.06 seconds to qualify for the final of the 100 metres at the Jamaican Athletics Championships in June 2025, before placing sixth in the final. He was named in the Jamaican squad for the
2025 NACAC Championships in
Nassau, The Bahamas. Nkrumie ran a personal best 6.57 seconds for the 60 metres (+1.4) at the 2026 Gibson McCook Relays in Kingston.{{Cite web | url= https://worldathletics.org/competition/calendar-results/results/7236661?eventId=10229683|date=1 March 2026 |title=Gibson McCook Relays ==Personal life==