Hire the Best Penetration Testers
in the United States
Fayetteville, North Carolina
Hi I am Daniel Hayes a experienced penetration tester specializing in red teaming, with a strong focus on adversary emulation. I have been ethically hacking for over five years and working as a cybersecurity consultant for three. I have successfully breached multi-million and billion-dollar organizations worldwide. As a former penetration tester for one of the top seven professional services firms globally, I have extensive experience working with different organizations from various industries to ensure their cybersecurity needs are met. Services I Perform (But not limited to) - Web Application Penetration Testing (Black Box / White Box) - External Penetration Testing (Black Box / White Box) - Internal Penetration Testing (Black Box / White Box) - Red Teaming / Adversary Simulation - Compliance and Regularly Frameworks (NIST, SOC2, HIPAA, Etc) I look forward to helping you keep your organization safe from any threat!
- Penetration Testing
- Network Penetration Testing
- Web App Penetration Testing
Baltimore, Maryland
Stop relying on automated scans. I find the vulnerabilities they miss. I’m a senior penetration tester and vulnerability researcher with deep experience across enterprise networks, web apps / APIs and cloud platforms. Most testers just run automated tools and hand you a generic report. I simulate how an attacker actually thinks, perform thorough testing, and deliver professional, tailored reporting suitable not just for your own remediation efforts but also for audit / compliance. Benefits of manual testing: - Chaining multiple low/medium findings to show more significant impact - Breaking multi-tenant isolation - Bypassing auth controls (JWT, OAuth, misconfigurations) - Identifying cost-amplification / abuse vectors (e.g., billing attacks in serverless environments) - ZERO false positives (and wasted time trying to remediate non-issues) - REAL severity scoring (not just CVSS or ratings with no connection to actual impact/risk for your systems and data) What I Deliver - Manual, attacker-style testing (not just scans) - Clear, prioritized findings with real business impact - Proof-of-concept exploits where it matters - Practical remediation guidance your devs can use immediately - Optional retesting to verify fixes Common Engagements - SaaS / multi-tenant application security testing - API and authentication testing (JWT, OAuth, session flaws) - Cloud security reviews (GCP, AWS, Azure, O365) - DevOps security reviews (Gitlab/hub, BitBucket, etc.) - Pre-SOC2 / investor readiness assessments - High-intensity black-box pentests Why Clients Hire Me - I go beyond the scan—I find what others miss - I understand both offense and architecture - I communicate clearly with both engineers and leadership - I’ve worked on MANY real-world, high-impact systems I also help organizations: - Investigate breaches - Contain active threats - Recover compromised systems (Note: I do not assist with social media account recovery.)
- Penetration Testing
- Security Assessment & Testing
- Ethical Hacking
- Network Penetration Testing
- Network Security
- Vulnerability Assessment
- Web App Penetration Testing
- Security Analysis
- Security Engineering
- Web Application Security
- Certified Information Systems Security Professional
- OWASP
- White Box Testing
- Security Infrastructure
- Incident Management
Carbondale, Illinois
Cybersecurity professional specializing in Red Teaming, Network Security, and Adversary Emulation. Skilled in bypassing EDR solutions, executing stealthy attacks, and assessing enterprise security postures. Led 12+ Active Directory-focused CTF events with 120+ participants, automated offensive security workflows, and evaluated vendor security solutions. Focused on TTP research, OPSEC evasion, and improving threat detection. I have worked on building test environments using Atomic Red Team and AWS Lambda, running attack campaigns, and securing APIs, web applications, and AI models. As the founder of Assumed Breach, I provide services such as penetration testing, red team operations, phishing simulations, and incident response. I am certified in PNPT, CRTO, and Security+, bringing expertise in offensive security.
- Penetration Testing
- Network Penetration Testing
- Vulnerability Assessment
- System Security
- Application Security
- Windows Server
- Linux System Administration
- Linux
- Cisco Certified Network Associate
- Python
- Scripting
- Computing & Networking
- Web Application Security
- Web Application
Kings County, New York
As a seasoned freelance programmer with a strong foundation in security and Unix systems, I bring a wealth of expertise to the realm of software development. With a passion for tackling complex challenges, I specialize in full-stack development, reverse engineering, and imparting knowledge through tutoring. Technical Proficiency: - Programming Languages: Proficient in a diverse range of languages including Python, Java, Ruby, Perl, C, JavaScript, and more! - Security Expertise: Extensive experience in identifying and mitigating security vulnerabilities. Adept at conducting penetration testing, threat modeling, and implementing robust security measures. - Unix Mastery: In-depth understanding of Unix-based systems, with a focus on Linux. Capable of optimizing system performance and ensuring the security and stability of Unix environments. Full Stack Development: - Frontend: Skilled in crafting responsive and user-friendly interfaces using HTML, CSS, and JavaScript frameworks such as React and Angular. Backend: Experienced in developing scalable server-side applications with proficiency in Node.js, Django, and Flask. Database Management: Proficient in designing and implementing databases using MySQL, PostgreSQL, and MongoDB. Reverse Engineering: - Binary Analysis: Expertise in reverse engineering and analyzing binaries to uncover vulnerabilities and enhance software security. Tutoring and Mentorship: - Educational Background: Possessing a comprehensive understanding of programming fundamentals, security concepts, and Unix systems, I am adept at conveying complex ideas in an accessible manner. - Mentorship: Committed to fostering the growth of aspiring developers through personalized guidance, code reviews, and hands-on mentorship. Additional Skills: - DevOps: Proficient in implementing CI/CD pipelines, containerization (Docker), and orchestration (Kubernetes) for streamlined development and deployment processes. - Networking: Knowledgeable in networking protocols, firewall configurations, and VPN setups to ensure robust and secure communication. - Cloud technologies: AWS, GCP, and Azure. Professional Approach: - Problem Solver: Known for my analytical mindset and creative problem-solving skills, I thrive in dynamic environments and excel at finding innovative solutions to intricate challenges. - Collaborative Team Player: Effective in cross-functional collaborations, I communicate technical concepts to both technical and non-technical stakeholders, fostering a cohesive and productive working atmosphere. With a commitment to continuous learning and a track record of delivering high-quality solutions, I am well-equipped to contribute to projects requiring a versatile and experienced freelance programmer with a focus on security and Unix environments.
- Java
- JavaScript
- C++
- Python
- Ruby
- SQL
- Perl
- C
- HTML
- Assembly Language
Poulsbo, Washington
As a 15-year cybersecurity professional and security researcher, I have a broad, deep understanding of end-to-end security processes and technologies. With my experience in the academic and business worlds, I have provided information security expertise to a variety of companies operating globally. I hold several security certifications, including: ► Offensive Security Certified Professional (OSCP) ► GIAC Penetration Tester (GPEN) ► GIAC Reverse Engineering Malware (GREM) ► Certified Information Systems Security Professional (CISSP) In addition to my hands-on work in security research, penetration testing, and reverse engineering, I hold a Doctoral degree in Computer Science. I regularly write and speak on security topics, including data security, network security, penetration testing, and digital forensics.
- Information Security
- Network Security
- Technical Writing
- Writing
- Certified Information Systems Security Professional
Wakefield, Massachusetts
Dedicated Cyber Security Professional IT - 15+ Years InfoSec - 10+ Years Penetration Testing - 10+ Years Certifications include: - Information Security (23) - Offensive Security Certified Professional (OSCP), Offensive-Security Certified Information Systems Security Professional (CISSP), (ISC)2 Network Security Professional, CompTIA Network Vulnerability Assessment Professional, CompTIA Pentest+, CompTIA Certified Information Systems Auditor (CISA), ISACA Certified Risk and Informations Control (CRISC), ISACA Systems Security Certified Practitioner (SSCP), (ISC)2 Security+, CompTIA Cybersecuirty Analyst+ (CSA+), CompTIA Certificate of Cloud Security Knowledge (CCSK), Cloud Security Alliance Cloud Essentials, CompTIA Security Analytics Professional, CompTIA Nessus Certificate of Completion, Tenable CSX Cybersecurity Fundamentals, ISACA IT Fundamentals+, CompTIA Certified Red Team Professional (CRTP), Pentester Academy eJPT - Junior Penetration Tester, e-LearnSecurity Certified Red Team Expert (CRTE), Pentester Academy WorkshopPLUS - Office 365: Security and Compliance, Microsoft AWS Certified Cloud Practioner, AWS Cybersecurity Audit Certificate, ISACA Attacking Active Directory with Linux, Pentester Academy - CVE (3) - CVE-2019-17526 CVE-2018-11628 CVE-2023-33524 - Industries (6) - Healthcare Financial Education Government Technology Consulting I am available for consulting, with a speciality in penetration testing, at the earliest convenience.
- Penetration Testing
- Information Security
- Network Penetration Testing
- Vulnerability Assessment
- Web App Penetration Testing
- System Security
- Red Team Assessment
- Application Audit
- API
- Cloud Security
- Risk Assessment
- Information Technology
- User Identity Management
- HITRUST Common Security Framework
How it works
Post a job for free Post a job
Tell us what you need. Create your own job post or generate one with AI then filter talent matches.
Hire top talent fast
Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.
Collaborate easily
Use Upwork to chat or video call, share files, and track project progress right from the app.
Payment simplified
Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.
Don't just take our word for it
“Upwork provides an umbrella-level of security. I can see a talent’s work history and ratings. I can hold payments in escrow. I can communicate through Upwork Messages instead of working through my email address.”
Kim Darling
Emerald Tiger
“Upwork is the best platform to hire skilled professionals when we're not looking for a full-time employee. All the companies in our portfolio use Upwork to find talent across a wide range of fields.”
David Merry
Kinetic Investments
“Our very specific requirements can be a challenge—With Upwork, we’re able to access a bigger community to ensure the success of our projects.”
Katja Krohn
Summa Linguae
How do I hire a Penetration Tester in the United States on Upwork?
You can hire a Penetration Tester in the United States on Upwork in four simple steps:
- Create a job post tailored to your Penetration Tester project scope. We'll walk you through the process step by step.
- Browse top Penetration Tester talent on Upwork and invite them to your project.
- Once the proposals start flowing in, create a shortlist of top Penetration Tester profiles and interview.
- Hire the right Penetration Tester for your project from Upwork, the world's largest work marketplace.
At Upwork, we believe talent staffing should be easy.
How much does it cost to hire a Penetration Tester?
Rates charged by Penetration Testers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.
Why hire a Penetration Tester in the United States on Upwork?
As the world's work marketplace, we connect highly-skilled freelance Penetration Testers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Penetration Tester team you need to succeed.
Can I hire a Penetration Tester in the United States within 24 hours on Upwork?
Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Penetration Tester proposals within 24 hours of posting a job description.
Find more freelancers
Top states for Penetration Testers in the United States
- Penetration Testers in California
- Penetration Testers in Florida
- Load Testing Engineers in California
- Selenium Developers in Oregon
- Selenium Developers in Illinois
- Test Cases Freelancers in California
- Software Testers in Maryland
- Software QA Testers in Massachusetts
- Software QA Testers in Colorado
- Software QA Testers in Illinois
- JUnit Specialists in California
- QA Manual Testing Freelancers in Florida
- QA Engineers in Texas
- Integration Testing Specialists in Washington
- Integration Testing Specialists in Florida
- User Acceptance Testing Specialists in Colorado
More top skills in the United States
- Network Pentesters in the United States
- Network Security Engineers in the United States
- Application Security Freelancers in the United States
- Vulnerability Assessment Specialists in the United States
- Web Testing Specialists in the United States
- Information Security Audit Freelancers in the United States
- Internet Security Specialists in the United States
- Certified Ethical Hackers in the United States
- Load Testing Engineers in the United States
- JMeter Specialists in the United States
- Test Execution Freelancers in the United States
- Performance Testing Specialists in the United States
- Firewall Developers in the United States
- Regression Testers in the United States
- Software Testers in the United States
- Certified Information Systems Security Professional (CISSP) in the United States
Similar Penetration Tester Skills
- Penetration Testers
- Vulnerability Assessment Specialists
- Application Security Professionals
- Network Pentesters
- Network Security Engineers
- Security Consultants
- Kali Linux Professionals
- Information Security Analysts
- Web Application Security Professionals
- Wireless Security Specialists
- Web Testing Specialists
- Information Security Audit Professionals