Difference in designation between visa and contract in the UAE

Sir,

I'm from India and I got selected for one of the construction companies in the UAE. Actually, I'm a BTech graduate civil engineer. I worked as a civil engineer in India for the past 3.6 years.

Now, they gave me an offer letter as a civil foreman, but I'm demanding them to give me the designation of a civil engineer. I'll accept the visa as a foreman.

They are trying to convince me with the foreman only after entering in the UAE. They will give me civil engineer designation only like that agent people are telling.

Is there any link between the offer letter and the visa process which I have to sign?

Please, help me with this.