Is it permissible for her to pray in front of employees at work?
Question

                I am a woman working in a company. Is it permissible for me to pray in front of employees at work in the same room?.
Praise be to Allah.
    Firstly: 

    It is clear from your question that you work in a place where 
    there is mixing with men. Mixing leads to many evils and things that are 
    forbidden, as is clear to anyone who has insight. Please see question no. 
    1200 for the evidence that mixing is haraam.  

    Trustworthy scholars have issued fatwas ruling that it is 
    haraam to work in mixed environments, such as the statement in Fataawa 
    al-Lajnah al-Daa’imah (12/156): Mixing between men and women in schools 
    and elsewhere is a great evil which has a serious impact on one's religious 
    commitment and worldly interests. It is not permissible for a woman to study 
    or work in a place where there is mixing between men and women, and it is 
    not permissible for her guardian to give her permission to do that. End 
    quote. 

    Please see question no. 6666: Should she carry on working in 
    a job where she mixes with men? 

    Secondly: 

    For a woman who is faced with this problem of working in a 
    mixed environment, if she can pray in her house, that is better, such as if 
    she can go back home long enough before ‘Asr that she can perform Zuhr 
    prayer. The Prophet  (peace and blessings of Allaah be upon him) said: 
    “A woman’s prayer in her house is better than her prayer in her courtyard, 
    and her prayer in her chamber is better than her prayer in her house.” 
    Narrated by Abu Dawood, 570; classed as saheeh by al-Albaani in Saheeh 
    Abi Dawood. That is because it is more concealing and protects 
    her from the gaze of men. 

    If she does not have time to offer the prayer in her house, 
    then she should choose the most concealed place in her workplace, and offer 
    her prayer there, wearing full hijab and covering all of her body. It is not 
    permissible for her to delay her prayer until the time for it is over. 
    Allaah, may He be exalted, says:  

    “Verily, As‑Salaah (the prayer) is enjoined on the 
    believers at fixed hours”

    [al-Nisa’ 4:103]

    Al-Sa’di (may Allaah have mercy on him) said:  
i.e., it is enjoined at 
    the proper time. This indicates that it is obligatory and that it has its 
    own time, and it is not valid unless done at that time. These are the times 
    agreed upon by the Muslims, young and old, knowledgeable and ignorant. They 
    learned that from their Prophet Muhammad  (peace and blessings of Allaah 
    be upon him), who said: “Pray as you have seen me praying.” End quote. 

    Tafseer al-Sa’di, 17/255 

    The free woman is ‘awrah and it is haraam for her to uncover 
    her face and hands in the presence of non-mahram men, whether she is praying 
    or in the state of ihraam or in any other normal situation, because of the 
    report narrated by ‘Aa’ishah (may Allaah be pleased with her) who said: The 
    riders used to pass by us when we were with the Messenger of Allaah  
    (peace and blessings of Allaah be upon him) in ihraam. When they drew level 
    with us, one of us would lower her jilbaab from her head over her face, and 
    when they had passed by us, we would uncover it. Narrated by Ahmad, Abu 
    Dawood and Ibn Maajah. If this was done in the case of ihraam when a woman 
    is required to uncover her face, then it is more important in other cases, 
    because of the general meaning of the verse in which Allaah, may He be 
    exalted, says: 

    “And when you ask (his wives) for anything you want, ask 
    them from behind a screen, that is purer for your hearts and for their 
    hearts”

    [al-Ahzaab 33:53]

    It should be noted that whoever gives up something for the 
    sake of Allaah, Allaah will compensate him with something better than it, 
    and whosoever fears Allaah and keeps his duty to Him, He will make a way for 
    him to get out (from every difficulty) And He will provide him from 
    (sources) he never could imagine (cf. al-Talaaq 65:2-3). So hasten to give 
    up working in a mixed environment, and look for permissible work that Allaah 
    will bless. 

    May Allaah help us and you to obey Him and do that which 
    pleases Him. 

    And Allaah knows best.