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！
I want to stay with the company for a few more years.
I plan to keep working for another few years.
「あと数年は会社勤めをしたい」と伝えるには、 I want to stay with the company for a few more years. （あと数年は今の会社に残りたいんです。） という言い方が自然です。stay with the company（会社に留まる）を使うことで、今の仕事を続けるという意思がはっきりと伝わります。
カナダ 
アメリカ合衆国 
