Website Security Audit & Vulnerability Assessment

I'm seeking a cybersecurity expert to conduct a comprehensive vulnerability assessment on my website. The primary concern is broken authentication vulnerabilities. The site is built using custom HTML/CSS/JavaScript, not on a platform like WordPress or an E-commerce solution.

Key Requirements:
- Extensive experience in conducting vulnerability assessments
- Proficient in identifying and addressing broken authentication vulnerabilities
- Skilled in working with custom HTML/CSS/JavaScript websites
- Proven track record in cybersecurity and website security audits

Please provide examples of previous similar work in your proposal.