I found that sentence when I googling. "Your company offers several marketing packages that I believe will soon be on the forefront of modern marketing tactics."

Now I'm trying to understand in especially,

"I believe will soon be".

I understand that sentence like this " I believe I will soon be ~" am I right to understand?

I want to know some usage of that phrase and how to remove "I" in grammatically.

How can I understand the meaning and grammar?