Fix my wordpress website

General information for the website: Engineering Consultancy
Description of requirements/features: My wordpress based site is not working.

A full description of what's wrong can be gathered by trying to visit the website...

http://think-engineer.com/

If you are confident that you can fix this quickly and reliably, then please let me know when you can do it.

I look forward to hearing from a suitably competent person soon.

Cheers,
Steve
Extra notes: