I think business person should be a yes-man against coalleagues and bosses.
However, if you will receive all requests from them, you will lost your active time.
In addition you will be licked by them.
Therefore we need negotiate to
them.
For example, refuse to requests, adjust workload.
It is effective you receive requests after you negotiated.
Does this sound natural?

business person -> a business person 【毎のサラリーマンにつき】/ business people 【サラリーマンとしても】
against -> with / towards, 【against】 はちょっと反対というネガチブ語感があるそうです。
coalleagues -> colleagues

receive -> take / get, それと普通には if ... will が敬語(?)以外には使わないかも。"if you take all requests" になりそう。普段に take はアクティブに感じますが、is taking requests というパッシブな使い方もオーソドックスに見えそうです。

【In addition you will be licked by them.】意味が失った。 舐める → will be made fun of by; will be underestimated by

文法フィックス：Therefore we need to negotiate with them.
うちがやる：So make it clear and communicate with them about it.

【refuse to requests】 あってる。でももっと自然に見えたければ refuse requests / refuse [some / their] requests / refuse to help (everything) それぞれのパターンがあります。シナリオに対して
【adjust workload】 ここも大体あってる。【adjust your workload】とは疑惑感がない

文法フィックス：It is effective [to / that you] receive requests [when / after] you negotiate.
または：An effective thing is to consider requests only after you negotiate.