Web Application Firewall (WAF) Support Specialist

Sentar is dedicated to developing the critical talent that the connected world demands to create solutions to address the convergence of cybersecurity, intelligence, analytics, and systems engineering. We invite you to join the small business team where you can build, innovate, and secure your career.

Sentar is seeking a Web Application Firewall (WAF) Support Specialist in Charleston, SC!Role Description:

The Web Application Firewall (WAF) Support Specialist is responsible for managing and evolving application-layer security controls using F5 Application Security Manager (ASM) to support DoD cybersecurity initiatives. The role supports F5 WAF policy tuning, site-specific request handling, and enforcement of application security controls across globally dispersed defense networks. This specialist will directly contribute to incident response efforts and coordinate with Cloud, Gateway, and Site Teams to ensure high-performing and effective web protection strategies.

Responsibilities:

• Primary responsibility will be issuing Firewall Acceptances - based on various customer requests

• Web Application Firewall Policy Development

• Develop, tune, and maintain WAF policies using F5 ASM Coordinate deployments and policy changes with cloud architects and local site engineers

• Support proactive tuning of policies based on learning mode analysis and stakeholder feedback

• Site Coordination & Access Management

• Fulfill block/unblock requests; provide technical justification for negative determinations

• Collaborate with subscriber sites to validate false positives and refine rule sets

• Support secure onboarding of new applications into protected environments

• Threat Support & Surge Response

• Participate in incident response surges and assist threat hunting efforts

• Align policy updates with adversary TTPs and emerging vulnerability trends

• Provide input to detection engineering and mitigation teams

Qualifications:Clearance Level: Secret (upgrade to TS/SCI required)

Education: Bachelor's degree and min 6 years of overall technical experience or 10 years of overall technical experience without a a degree

Certifications: DoD 8570 IAT Level II and GCIH, CEH or CySA+

Experience:

• Experience with firewalls

• Experience monitoring network traffic

• Understanding of OWASP Top 10, HTTP/HTTPS protocols, and common web exploits

• Familiarity with incident response workflows and cyber threat mitigation

• Experience supporting DoD cybersecurity or network defense environments

• Experience with Management of Controls and/or Security of an Application

Preferred Qualifications:

• 1–2 years experience with incident response or threat hunting in enterprise or DoD settings

• Experience with F5 firewalls

• Strong verbal and written communication skills for customer interactions and technical documentation

• Understanding of network-level protocol analysis and secure web architecture

• Prior experience supporting remote site deployments or global operations

Benefits at Sentar:

Our unique ownership model attracts top talent, giving employees the freedom to take initiative and drive meaningful improvements. In addition to cultivating a thriving and inclusive work environment, Sentar offers an extensive benefits package designed to support the well-being of employees and their families. Employee ownership is the foundation of our culture, promoting participation, teamwork, and accountability while ensuring long-term financial security and a commitment to excellence.

• Voluntary Medical, Dental, Vision, with Health Savings or Flexible Spending Plan options

• Voluntary Life, Critical Illness, Accident, and Long Term Care insurance options

• Group Term Life, Short-Term and Long-Term Disability is provided by Sentar to all qualifying employees

• Generous 401(k) match

• Competitive PTO plan that graduates quickly with years of service

• Other leave programs; holiday schedule along with bereavement, maternity, jury and military duty

• Mental health awareness programs

• Tuition reimbursement

• Professional development reimbursement

• Recognition and Awards programs

If you are not ready to apply for this position, submit your resume here to join our talent community. We'll keep you updated occasionally on new job opportunities.

Sentar is an Affirmative Action and Equal Opportunity Employer M/F/Vets/Persons with Disabilities

Our culture is one of inclusivity and support. Sentar is proudly an Equal Opportunity and VEVRAA Federal Contractor Employer M/F/Vets/Persons with Disabilities. Follow these links to learn more about your rights: EEO Is the Law Poster; EEO Is Law Supplement; and Pay Transparency.

We want you to build your career at Sentar, so if you are an individual with a disability and require a reasonable workplace accommodation applying for a job or at any point in the employment process, contact the Recruiting Manager at recruiting@sentar.com. Please indicate the specifics of the assistance needed. Thank you for considering Sentar in your employment search.

Build, Innovate, Secure Your Career at Sentar.