I need someone to check security on my application

My name is Joe and I'm looking for a specialist to check the security of my application. Security is of the utmost importance to me, which is why I've already taken steps to ensure all aspects of my business are secure. However, I would like to go a step further by conducting a security test. Specifically, I need someone to check my network security, as I already have protocols in place. Furthermore, I require the specialist to carry out a penetration test to scan for any vulnerabilities, which may present a threat to my application. I trust that you can provide this service to the highest of standards and I look forward to reviewing your offers.