Asmaa:

 I cannot know all of the details as to how you would be  in a face to face situation  with this man;

but presuming that you   arrange to actually stand face to face and speak to him, the direct approach is best. Like this:

   Mr. Goober,  I want to work for your company.

 (then I would proceed with some general information about your self which support your interest.)

   I  have spent  some time studying the technology   which your company employs.

and my Engineering knowledge  and  Education   have prepared me to be a useful member of your company.

 (I would say just about this much and stop, an allow  Mr. Goober to answer.

He probabaly will not say  "No"  outright.  He might   refer you to his secretary  or other company officer.  Have a resume ready to give to them.  Forms for resume  writing are available on the Internet)

much thanks bruce thats so helpful , actually i have a problem which is am so shy person , i believe in alot and have a ability to be succesful @ whatever position am in , espcially in my pervious job ,, but my shyness make me lake to achieve or to grow .... also i wanna to be talktive in english that will help me alot to move to another department 

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Rule #1   Shut up!

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Rule #2   Shut up!

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Rule #3     Shut up!

   By the way, you should  always have for yourself,  if you intend to promote yourself in the future, in any  context at all, a   Business Card with your  Name and Phone number  and some reference to

What---You---Do to give to other people generally.

  You also will want to tell everyone you know (as you hand them your business card) that you are looking for employment with companies of a certain   kind.)   This is called Networking.

    When you go to a resaurant,  leave a generous tip, AND your Business Card!

 If you go to a sporting event, and your team scores,  throw a dozen or more of your business cards into the air. (If appropriate. In the USA, it would be.)

  Let all of the world know who you are, and what you do. Make the world remember you,  recognize you, and  be able to recall to mind that you are  "that nice guy"  that does such and such and is very generous.

  In fact, anyone who actually knows the business of promotion,  would tell you that you should have been doing this  months ago or even years ago. That is how it works. 

We want everything now.  Actually,  we get it much later.

  Do not offend people with personal opinions.  Be slow to speak and quick to listen.

There is a saying about how to be an excellent communicator with people generally.

It offers THREE RULES.