I have problem with sentences structures.

I have sentences:

> 
> I specialize in design wireless and wired network infrastructure,
>  configure devices company's Cisco Systems and MikroTik, and security
>  and techniques used successfully to protect IT resources.
>  Additionally, I have knowledge of voice over IP (VoIP) technology.
> 
> 
> 

I am not sure, is this sentence grammatically correct?

Thank you in advance for your help.