This layout may have been fine last decade, but these days it screams amateur. It doesn't take much to rearrange this layout into something neat looking, current, and dynamic. Something that will leave your customers impressed, rather than wondering whether or not to trust your service.
Faults in this Design
Cold and Dark: For a site like this, forget it. A generally positive color scheme will be far more effective in the area of gaining the trust of your visitors.
Boring Header: Let's get creative. A basic text header with an icon-free navigation on top of a simple image might be alright, but heck, you can do better, I know you can!
Content is king. Everyone seems to agree. However, all of the content in the world is still shaky without a solid design to back it up. Especially for a small company or brand.
That means that you can throw in fifty great customer testimonials, but without a design that says "I'm professional, organized, and worthy of your business.", they won't matter much at all.
A layout for your header that incorporates:
an enhanced, more creative version of your picture, featuring various curve and filter alterations.
a dynamically positioned setup, featuring a fixed header with a scroll-and-catch body div, stopping with the title and navigation at the top.
A full-width, light colored page without the black background.
Transition (with scroll)
By no means do I suggest that this is the perfect layout for you, but I do implore that you Google "Best Websites 2014" and have a look at what great designers are doing in web design. It may offer you the spark of creativity needed to improve your design in a way that you like.