The one who is delegated to distribute zakaah is not one of those who are employed to collect it
Question

                If a rich man gives me the zakaah of his wealth to distribute it to the poor, am I one of those who are employed to collect it and can I take some of it?.
Praise be to Allah.Those who are employed 
    to collect the zakaah are those who are appointed by the Muslim authorities, 
    who collect it, store it and distribute it, and so on. 

    See al-Sharh al-Mumti’, 6/142 

    But if a person is delegated by the owner of the wealth to 
    distribute his zakaah, he is acting on behalf of the owner of the wealth, 
    and is not one of those who are employed to collect it. 

    Al-Nawawi (may Allaah have mercy on him) said in 
    al-Majmoo’, 6/165: 
Al-Shaafa’i and his 
    companions (may Allaah have mercy on him) said: If the one who is 
    distributing the zakaah is its owner or his deputy, the share of the agent 
    employed to collect it is waived and he must give it to the seven other 
    categories (of people who are entitled to it). End quote. 

    Shaykh Ibn ‘Uthaymeen (may Allaah have mercy on him) was 
    asked: A rich man sent his zakaah to someone and said: “Distribute it as you 
    see fit.” Is this deputy one of those who are employed to collect it and is 
    he entitled to any of it?” 

    He replied: 
This deputy is not one of 
    those who are employed to collect it, and he is not entitled to any of it, 
    because he has been delegated only by a particular individual. This is the 
    reason – and Allaah knows best – why the Qur’aan says (interpretation of the 
    meaning):  

    “those employed to collect (the funds)”

    [al-Tawbah 9:60]
This refers to those who 
    are appointed to do this task. Therefore the one who is delegated to 
    distribute the zakaah on behalf of a particular individual is not regarded 
    as one of those who are employed to collect zakaah. And Allaah knows best. 
    End quote. 

    Majmoo’ Fataawa Ibn ‘Uthaymeen, 
    18/369. 

    Shaykh Ibn Baaz (may Allaah have mercy on him) was asked: I 
    have some wealth on which zakaah is due, and I want to send some of it to 
    the poor in another country. I know a rich man in that country and I want to 
    send the money through him so that he can give it to the needy, but he will 
    not do that unless I pay him. Is it permissible to give him some of the 
    zakaah money in return for his doing that?  

    He replied: 
It is better for you to 
    distribute your zakaah among the poor in your own country, but if you send 
    it to another country where the poor are in greater need or because they are 
    your relatives and are poor, there is nothing wrong with that. If you 
    delegate someone to distribute the zakaah, there is nothing wrong with 
    giving him something in return that is not part of the zakaah, because what 
    you have to do is distribute it among the poor yourself or through your 
    trustworthy deputy who you have to pay from your own wealth, not from the 
    zakaah. End quote. 

    Majmoo’ Fataawa Ibn Baaz, 14/258.