With the ability...?

[SunMoon]

I am writing a cover letter and I am not sure how to use the word ability correctly. For example:

I able to manage client relationships with the ability to partner with big players such as IBM and HP.

Is it correct?

[susiedqq]

What do you want to say? WHO has the ability - you or the client?

I am able to manage client relationships that have the ability to partner with big players such as IBM and HP.

or

I am able to manage client relationships and have the ability to partner with big players such as IBM and HP.