I agree about changing the layout to make it fit on one page. But I wouldn't remove high school. He's done IB, which is way more challenging than regular high school. It's a straight admissions ticket to many top universities, some even let you skip the freshman year entirely based on what you took with IB.
It's unfortunately not as widely recognized in the US than elsewhere in the world.
But he's looking for jobs after college. High school, for this guy, was 5-6 years ago! Even if he took IB or AP courses...so what? Tons of people have taken IB/AP courses.
A company won't decide to hire you based on your high school marks.
I did admission at a liberal arts college, and IB didn't even impress us. It certainly wouldn't impress me in trying to hire someone. I want someone with enough sense to know that high school doesn't belong on the C.V.
It's unfortunately not as widely recognized in the US than elsewhere in the world.