The man has been with the company for 30 years,but the management has now decided to dispense with his services.

参考译文：这名男子已经在该公司工作了30年，但管理层现在已经决定不再需要他为公司服务。 

【1】dispense vi.摒弃；不再需要；不再用  (英文解释：to stop using sb/sth because you no longer need them or it ）

Debit cards dispense with the need for cash altogether.有借记卡就完全不需要用现金了。

I think we can dispense with the formalities 我想我们就免去客套吧。

We'd dispense with charity drives.我们将不再进行慈善捐款运动。

【2】dismiss  vt.解雇；免职；开除(英文解释：to officially remove sb from their job） 

She claims she was unfairly dismissed from her post.她声称自己被无理免职。

The military commander has been dismissed.  军队司令已经被免职了。