Senior Security Engineer 5503
Tier4 Group
The Senior Security Engineer designs, implements, operates, and continuously improves the security technologies and controls across applications and supporting platforms. Primary focus is Application Security -embedding security into the SDLC and CI/CD pipelines, strengthening web/API protections, and enabling proactive detection, while contributing broadly to Security Engineering capabilities (identity, cloud/onprem security platforms, logging/telemetry, and automation). The role partners closely with development, DevOps, and operations teams to build secure-by-default applications and services.
Before applying for this role, please read the following information about this opportunity found below.
PRINCIPAL RESPONSIBILITIES
- Develop and maintain software application security policies and procedures
- Implement software application security controls
- Partner with DevOps in developing a secure CI/CD pipeline
- Design and operate web application firewall (WAF) and API protections; tune rules, reduce false positives, and automate policy updates
- Identify application security vulnerabilities and issues, perform risk assessments and provide mitigations
- Develop security monitoring for application stack
- Conduct technical investigations of application security incidents
- Interface with senior stakeholders across the IT leadership team to proactively interpret risks and priorities.
- Support the diversity and inclusion strategy by following policies and procedures that ensure opportunities for employees and diverse business partners.
- Assist with other job duties as assigned.
REQUIREMENTS
- A minimum 6 to 8 years of experience in Application Security (designing, implementing, and operating security controls in enterprise application environments).
- Hands-on experience with web application security, including OWASP Top 10 vulnerabilities
- Hands-on experience with WAF/API security (policy design, rule tuning, automation), container security (runtime hardening, image scanning, vulnerability risk assessments)
- Hands-on experience with conducting web application security scans, vulnerability assessments and/or penetration testing
- Experience in investigating problems and processes within established methodologies and best practices.
- Experience working with Authentication and Authorization services like OAuth and OpenID
- Experience in operating on-prem or cloud-based security platforms
- Ability to troubleshoot security and network-related issues and communicate technical findings effectively
- Ability to listen and integrate ideas from diverse groups of individuals, build and maintain respectful relationships, collaborate with others, and resolve conflicts constructively.
- Bachelor's Degree in Information Security or Computer Science or Computer/Electrical Engineering, and/or equivalent field experience. xhyhwjd
- Proof of eligibility to work in the United States.
$105k - $125k
NVR, Inc. is seeking a Senior Security Engineer to work on site in Reston, VANVR’s technology teams thrive on providing multiple business lines with the tools and cutting-edge technologies that support NVR’s mission to create a better living experience for our customers...SeniorWork experience placement$174k - $252k
Identify security issues and implement and design security controls, tools, and services to improve security systems and processes.Embed... ...experience in cloud security, application security, security engineering, computer and network security, or security protocols.Must...SeniorLocal area$148.5k - $223.9k
...agentic era? You’re in the right place! Agentforce is the future of AI, and you are the future of Salesforce.Job Title: Senior Offensive Security Engineer, Red TeamThe ExperienceThe Product Red Team focuses on attacking Salesforce's full deployed product ecosystem and...SeniorFull timeRemote work$178.4k - $226.7k
Amazon Optics is building the next generation of physical security software that protects every AWS data center and Amazon corporate facility worldwide. We need a Security Engineer III who will own the security posture of distributed systems that "have to be available...SeniorInternshipWorldwideFlexible hours- ...Job Description Endurance IT Services is in search of Senior Security Engineer to join a client in North Virginia! This security engineer will help design, implement, and maintain enterprise security solutions that protect systems, data, and users. This role combines...Senior
$174k - $252k
...Senior Security Engineer, OCONUS, Google Pub Sector Share Senior Security Engineer, OCONUS, Google Pub Sector corporate_fare Google place Reston, VA, USA Must be a US Citizen to meet customer and compliance requirements, including potential access to classified...SeniorLocal area$174k - $252k
Work closely with internal Security teams, as well as our partner and customer teams.Develop operating system and hardware security features... ...the scope of the broader area.Review code developed by other engineers and provide feedback to ensure best practices (e.g., style...SeniorWorldwide$99k - $225k
Information Security Engineer, SeniorThe Opportunity:Are you looking for an opportunity to share your experience in network security, DNS, IPAM, and security analysis to support an enterprise-level business? As an Information Security Engineer, you can identify the requirements...SeniorFull timeContract workPart timeWork at officeLocal areaRemote work- ...Senior Information Assurance/Security Engineer Job Description Responsibilities: • Learn, operate, and administer Xacta IA Manager Software Suite. • Ensure technical security benchmarks are maintained. Analyze Xacta system Nessus scans, conduct remediation/system...SeniorLocal area
$99k - $225k
Cloud Security Engineer, SeniorThe Opportunity:Everyone is trying to “harness the cloud”, but not everyone knows how to secure it. As a security engineer, you know how to assess and implement requirements that ensure the safety of information systems and protect them against...SeniorFull timeContract workPart timeWork at officeLocal areaRemote work$174k - $252k
...Responsibilities Collaborate with internal Security teams and partner and customer teams. Develop operating system and hardware... ...within the broader technical area. Review code from other engineers and provide feedback on style, correctness, testability, and efficiency...SeniorFull time$82.3k - $220k
...defense and space exploration to biomedical engineering, lives often depend on the solutions we... ...Summary:Draper is actively seeking a Senior Cyber Effects Engineer that will support... ...innovate for the greater good of our Nation's security. As a part of the Draper Cyber Effects...SeniorFull timeLocal area$145k - $210k
Senior Cyber Security EngineerCooley is seeking a Senior Cyber Security Engineer to join the Security team.Position summary: Cooley Technology embraces a culture of customer service excellence and all members of the department are expected to move this agenda forward....SeniorFull timeTemporary workWork at officeFlexible hoursWeekend work- Senior Information Systems Security Engineer (ISSE) TS/SCI CI PolyDepartment: Government Customer- ChantillyLocation: Chantilly, VASenior ISSEPosition Description:The Senior Information Systems Security Engineer provides support to the customer in the area of Cyber Security...Senior
$164.3k - $222.3k
Verisign helps enable the security, stability, and resiliency of the internet. We are a trusted... ....We have an exciting opportunity for a Senior Information Security Architect. This... ...-domain security challenges, and advise engineering and executive leaders on risk, tradeoffs...SeniorWork at officeFlexible hours- Strategic ACI is seeking an Expert Cyber Security Engineer to capture and refine information security requirements and ensure that the requirements are integrated into information technology component products and information systems through purposeful security architecting...SeniorFor contractors
- Position Overview:This position will serve as a member of the Exostar Information Security Office and will report to the Manager of Governance & Engineering. This role is responsible for designing and implementing technical security controls across application, cloud,...SeniorFull timeWork at officeFlexible hours
$140.44k - $202.3k
...Job Description Job Description FEDERAL HOME LOAN BANKS OFFICE OF FINANCE POSITION : Senior Security Engineer DATE : September 2026 DEPARTMENT : Information Technology FLSA...SeniorWork at officeLocal area$140k - $190k
...flexibility, and ingenuity to strengthen and protect our nation’s vital interests. Title : Information System Security Officers (ISSO), Senior Security Engineers & Security Engineering Leads (CBP) Clearance : Active Top Secret with SCI eligibility, Ability to obtain...SeniorTemporary workImmediate startRemote workRelocation packageDay shift- ...impacts our nation and improves lives. This is where your skills strengthen national security, cybersecurity, health, transportation, and citizen services. We’re a nonprofit engineering, applied research, and advanced technology organization working in the public...SeniorWork experience placementInternshipLocal areaImmediate start3 days per week
$175k - $260k
Senior Information Security Engineer, Offensive Security Seeking experienced offensive security professionals to conduct security assessments, red team operations, and network exploitation activities in support of client security requirements. What You'll be Owning Execute...SeniorContract workWork experience placement- ...impacts our nation and improves lives. This is where your skills strengthen national security, cybersecurity, health, transportation, and citizen services. We’re a nonprofit engineering, applied research, and advanced technology organization working in the public...SeniorWork experience placementInternshipLocal areaImmediate start3 days per week
- M.C. Dean, headquartered in Tysons, Virginia, seeks an Engineer 6 to join the Security and Electronic Systems (SES) unit. The role focuses on designing, engineering, integrating, operating and maintaining electronic security services for federal, local and commercial customers...SeniorLocal area
- ...PASS A POLY CLEARANCE****** Software Engineer IV Our client's Space & Intelligence... ...and automated testing frameworks. For Senior Principal level: A Bachelor's degree with... ...frameworks like Django, FastAPI, or Flask. Security+ or equivalent certification and...SeniorWork at office
$130k - $180k
OverviewAs a Senior Cloud Security Engineer, you will work with our team and clients to design, implement, and maintain secure cloud environments and architectures. You will support cloud security across the system lifecycle, including security architecture, identity and...Senior- M.C. Dean, Inc. seeks an Engineer 6 in the Security and Electronic Systems (SES) unit to design, engineer, integrate, operate, and maintain electronic security services for federal, local, and commercial customers. You will lead large-scale designs and work across disciplines...SeniorLocal area
- ...Role Redhorse transforms the way government uses data and technology. To support this mission, we are seeking a Senior Information System Security Engineer (ISSE) to provide expert technical and programmatic Information Assurance (IA) services. In this role, you will...SeniorContract work
- ...overcome the most advanced technical challenges. The team comprises engineers of multiple disciplines including vulnerability research,... ...challenging, meaningful work that is vital to our national security, apply today!Principal Cyber EngineerCyber Offense and Defense...SeniorFull timeRelocationRelocation package
$122k - $253k
...defense, civil, and commercial markets.Senior Principal Cyber EngineerCyber Offense and... ...Defense Experts (CODEX) is seeking a cyber engineer to join our team to solve crucial cyber... ...work that is vital to our national security, apply today!Technical RequirementsTop Secret...SeniorFull timeRelocationRelocation package$113.2k - $237.8k
Job Title: Cyber Reverse Engineer, SeniorJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: Top SecretEmployee... ...Opportunity:Join our unique team solving wide-ranging national security cyber and hardware challenges. Use your skills in interesting...SeniorContract workWork experience placementFlexible hours
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Security Engineer 5503. Be the first to apply!
- senior security operations engineer Reston, VA
- information technology security engineer Reston, VA
- network security engineer Reston, VA
- physical security engineer Reston, VA
- security engineer Reston, VA
- IT security engineer Reston, VA
- aws cloud security engineer Reston, VA
- security software engineer Reston, VA
- senior cloud security engineer Reston, VA
- security infrastructure engineer Reston, VA




