I am a newish freelancer trying to gain reputation and credibility. I have 5yr experience developing WP sites. See my portfolio for examples of sites I've developed and some that I currently maintain. By day, I'm a professor in a research department where we use synthesized peptides, so I'm intimately familiar with your product.
I would suggest a complete revamp of your website. I can see your previous developer used Microsoft's Frontpage to generate your website. I would use Wordpress and implement a theme that has responsive characteristics. That is, it would look good on a computer, or an iPad sized screen, or a smartphone. Currently you're using a fixed size page, and with trends today, it's important to cater to the mobile sized screens.
I pride myself on my pixel perfect attention to detail and ability to get work done in a timely fashion. I'm also a native English speaker.
Thank you for your consideration.