clean functional elegant website

Dear designer, ** Please read carefully ** I require a clean, functional, but elegant website so that my small consultancy which I will be starting can have an internet presence and present me as a professional player. It should be responsive and pages should load fast. it should be viewable on a range of computers, including PC/Mac, tablets and mobiles. Please look at [login to view URL] as a guide for the general look & feel that i want to create for my website (although mine will have less content and there fore will be less complex than McKinsey. It will have just a few pages such as the following (as a guide): - Landing homepage - About Us - What we do (further subdivided into 2-3 further pages) - Case studies - Contact Us - Careers I will provide all content and images - but I need someone who will provide me with a good finish with a professional look and feel - together with an easy to follow guide if I need to make changes in the future - or include support for the first 6 months to make any minor changes. Please submit no more than 2 examples of website you have created so I can see your previous work. Most importantly please look at [login to view URL] and bear in the mind that mine will be less complex than this site - but my finishes website should look as professional. I look forward to working with you.