I like most of the site, but agree with @C_Born, because the initial landing page is so important for clients first impression, I also think the Grey square box throws you off, and conveys redundant info. But I think it was put there to make a ‘bing’ statement, but it does the opposite.
I think the photo of the factory should be on the site, but maybe in the About or Info pages, Some darker lower perspective shots with depth of field and some spot lights might be a better approach if someone there enjoys photography (pro photographers can be expensive!)
So I think that initial photo really needs to have some ‘WOW’ factor but also show off your products &/or services. Im thinking some close up Macro photos of boards, IC’s for the products side, the services side is a bit more difficult, but maybe some abstract photos showing equipment/processes/people?
I see the site is running on another domain, is this just for testing? PLEASE PLEASE don’t switch off the old site, as it still contains also of useful info on the legacy stuff, and it also helps to tell the story of GHI over the years, which also builds trust that you mention on the new site, so I think its important to keep it!, even if its off on a sub-domain…