I'd like to work at the company I'm at for another few years.
I'd like to stay at the company where I work for the next several years.
この場合、次のような言い方ができますよ。
ーI'd like to work at the company I'm at for another few years.
「あと数年今いる会社で働きたいです」
for another few years「あと数年間」
ーI'd like to stay at the company where I work for the next several years.
「あと数年は勤めている会社に残りたい」for the next several years「次の数年間」＝「あと数年間」
ご参考まで！
カナダ 
