回答
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I've been doing this job for over 10 years.
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I've been working in this field for over 10 years.
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I've been working at this company for over 10 years.
「この仕事に10年以上携わっています」を直訳すると I've been doing this job for over 10 years になります。I've been working at this company for over 10 years や I've been working in this field for over 10 yearsも大丈夫です。
company - 会社
field - 分野