Sure! There are several reliable penetration testing services that can help assess your network's vulnerabilities. Here are a few options:

1. Trustwave - Trustwave offers comprehensive penetration testing services to identify and address security weaknesses in your network. Their team of experienced professionals uses industry-standard methodologies to simulate real-world attacks and provide actionable recommendations.

2. Rapid7 - Rapid7's penetration testing services help organizations proactively identify and address vulnerabilities. Their team of experts uses a combination of automated tools and manual techniques to thoroughly assess your network's security posture.

3. Synopsys - Synopsys offers penetration testing services that help organizations identify and mitigate security risks. Their team of certified ethical hackers performs comprehensive assessments and provides detailed reports with prioritized recommendations.

It's important to note that the choice of a penetration testing service depends on your specific requirements and budget. Before finalizing a provider, consider factors such as their expertise, reputation, and customer reviews.

References:

1. Trustwave: https://www.trustwave.com/en-us/services/penetration-testing/
2. Rapid7: https://www.rapid7.com/services/penetration-testing/
3. Synopsys: https://www.synopsys.com/software-integrity/services/penetration-testing.html