He was determined to seize on (upon) the opportunity to leave his employer a good impression.

他决心抓住这个机会给他的雇主留下好印象。

youdao

Whether or not business schools overhaul their programs in reaction to these unprecedented times, they should certainly seize upon this moment for reflection on their purpose.

FORBES: Magazine Article

While Labour was quick, after it was elected in 1997, to seize upon the welfare problems presented by an ageing population, its first initiatives focused on private pension provision.

BBC: Q&A: The Pickering review