He came from Egypt to Jeddah for work during Hajj season, then he was given permission to do Hajj, so he entered ihram from Jeddah
Question

                I am from Egypt, and I went to Jeddah for work during Hajj season. After spending twenty days in Jeddah my work ended, and I was given permission to do Hajj, so I intended to do Hajj from that time, and I entered ihram for ‘Umrah from Jeddah, intending to do Hajj tamattu‘ (in which one enters ihram for ‘Umrah, exits ihram after ‘Umrah, then enters ihram again for Hajj on 8th Dhu’l-Hijjah). Is this correct, or do I have to go back to the miqaat of the people of Egypt?
Praise be to Allah.
    If a person wants to do Hajj or ‘Umrah, and he is outside the 
    miqaat boundary, he has to enter ihram from the miqaat. However, if his 
    place of residence is within the miqaat boundary, such as the people of 
    Jedah, then he may enter ihram from his place of residence, because of the 
    report narrated by al-Bukhaari (1524) and Muslim (1181) from Ibn ‘Abbaas 
    (may Allah be pleased with him) who said: The Prophet (blessings and peace 
    of Allah be upon him) defined the miqaat of the people of Madinah as 
    Dhu’l-Hulayfah; that of the people of Shaam (Syria) as al-Juhfah; that of 
    the people of Najd as Qarn al-Manaazil; and that of the people of Yemen as 
    Yalamlam. They are for them and for others who come through them with the 
    intention of performing Hajj and 'Umrah; and whoever is living within these 
    boundaries (can enter ihram) from the place where he starts, and the people 
    of Makkah can enter ihram from Makkah. 

    The words of the Prophet (blessings and peace of Allah be 
    upon him), “and whoever is living within those boundaries (can enter ihram) 
    from the place he starts” mean: he can enter ihram from the place where he 
    is. As you did not form the intention to do Hajj until after you finished 
    your work, at which time you were in Jeddah, then you may enter ihram from 
    the place where you are, and you do not have to go to the miqaat. 

    Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) was 
    asked: I was sent (to Makkah) by my company during Hajj season and I 
    travelled with the group as far as Mina, then I decided to ask my work for 
    permission to perform Hajj. Should I go to the miqaat and enter ihram from 
    there, or can I enter ihram from the place where I am? 

    He replied: You can enter ihram for Hajj from the place where 
    you are, because when you passed the miqaat, you did not know whether you 
    would be given permission or not, so you had not decided to do Hajj. So for 
    example, if they gave you permission in Mina, then enter ihram from Mina; if 
    they gave you permission in ‘Arafah, enter ihram from ‘Arafah.

    End quote from Liqa’ al-Baab al-Maftooh, 89/20 

    He was also asked: In sha Allah, I am intending to do ‘umrah 
    on the day of Hajj, and I am assigned to do some tasks during Hajj season. 
    He said: If my work allows me, and it is most likely that work will not say 
    no. But we say there is a 10% chance that they may say no, as a precaution. 
    He has passed the miqaat now; does he have to go back in order to enter 
    ihram from the miqaat? 

    He replied: No. If the man has been given some tasks to do 
    and does not know whether he will be given permission or not, he does not 
    have to enter ihram from the miqaat. Then if he is given permission, he may 
    enter ihram from the place in which he was given permission. 

    End quote from Liqa’ al-Baab al-Maftooh, 178/18. 

    And Allah knows best.