Mngomezulu is joined by national U20 teammates props Lamla Nunu and Corne Weilbach, hooker Lukhanyo Vokozela, lock Connor Evans, loose forward Louw Nel and fullback Duran Koevort in signing extensions with DHL Western Province.
Fellow Junior Springbok players Imad Khan (scrumhalf), Suleiman Hartzenberg (centre) and Paul de Villiers (loose forward) are all on existing contracts in an exciting junior group.
Having made his DHL Stormers debut in the Vodacom United Rugby Championship play-offs, Mngomezulu then took the captaincy of the national U20 side, leading them on an unbeaten U20 Six Nations Summer Series campaign.
Evans also earned his first DHL Stormers cap this season, having performed regularly for DHL Western Province, while Nunu, Vokozela and Weilbach also featured for the senior side in the Carling Currie Cup this year.
These players also join the likes of DHL Western Province U20 captain and loose forward Armand Maritz, hooker Keagan Blanckenberg and fullback Luke Berger in signing extensions.
DHL Stormers Head Coach John Dobson said that retaining talent of this calibre is vital in building on the success that the DHL Stormers enjoyed in the inaugural Vodacom United Rugby Championship campaign.
“This region is a conveyor belt of rugby talent that is unmatched worldwide and it is fantastic to see so many of our promising young players commit their immediate futures here.
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“We have already seen some of these players make the step-up to senior level and look forward to seeing all of them develop further within our system,” he said.