Information System Security Engineer (ISSE)

Tier4 Group; Chambersburg (Franklin County); Hybrid; USD 130,000 - 160,000; Full time

Job summary

Tier4 Group is seeking an Information System Security Engineer (ISSE) to serve as a customer-facing cybersecurity engineering consultant across DoD-inspired environments. The role requires RMF/NIST expertise, DoD policy interpretation, and strong risk-focused design capabilities, with hybrid onsite work in Chambersburg, PA or Fort Meade, MD.

As an ISSE you will guide engineering teams, translate requirements into actionable controls, and mentor staff while ensuring secure SDLC practices and

Qualifications

• Bachelor's degree or equivalent professional experience.
• 10+ years of related experience.
• DoD 8140 Work Role 652 Security Architect Certification requirement.
• Current DoD Top Secret clearance.
• Must reside within commutable distance of Fort Meade, MD or Chambersburg, PA for hybrid onsite schedule.
• Expert-level RMF/NIST SP 800-37 knowledge.
• Expert-level NIST SP 800-53 controls knowledge.
• Hands-on engineering/configuration with enterprise security technologies.

Responsibilities

• Embed as security engineering expert for Mission Partners and system owners.
• Provide security engineering support through SDLC including design reviews and modernization.
• Translate RMF and DoD policy into actionable, threat-informed solutions.
• Conduct security architecture and design reviews for new/existing systems.
• Analyze architectures, cloud/native setups, apps, APIs, containers and data flows for weaknesses.
• Collaborate with architects/developers to implement achievable controls and reduce friction.
• Develop vulnerability mitigation strategies and support POA&M actions.
• Create solutions to reduce attack surface without compromising mission.
• Translate requirements into MFA, encryption, secure zoning and related controls.
• Apply DoD STIGs, SRGs, PPSM to system engineering.
• Use SIEM/vuln/EDR findings to drive improvements.
• Mentor ISSMs, ISSOs, developers, and owners.
• Present risks and mitigations to tech staff and leadership.
• Document customer interactions and recommendations.

Skills

RMF expertise

Security architecture

Threat modeling

Leadership

Communication

Education

Bachelor's degree

DoD 8140 Certification

Tools

Splunk

Elastic

ACAS/Nessus

EDR

Job description

Maximum Conversion Salary: $130k-$160k
Position Location: Customer Site - Chambersburg, PA, Customer Site - Fort Meade, MD
Location Type (Remote, Hybrid, Onsite): Hybrid (4 days onsite)

The Information System Security Engineer (ISSE) serves as a dedicated, customer-facing cybersecurity engineering consultant supporting organizational ISSMs, ISSOs, Mission Partners, system owners, architects, and development teams. The ISSE provides expert security architecture and Risk Management Framework (RMF) guidance for on-premises, cloud-hosted, legacy, and modernizing systems throughout the System Development Lifecycle (SDLC). The ISSE helps customers understand cybersecurity requirements and develop actionable technical solutions that implement controls, remediate vulnerabilities, and improve system security before or following formal assessment.

Essential Duties and Responsibilities:

• Serve as the embedded security engineering expert for Mission Partners, ISSMs, ISSOs, system owners, architects, and development teams.
• Provide security engineering support throughout the SDLC, including requirements gathering, design reviews, sprint planning, modernization, implementation, and production.
• Translate RMF, NIST SP 800-53, DoD cybersecurity policy, and other governance requirements into actionable, threat-informed engineering solutions.
• Conduct in-depth security architecture and design reviews for new and existing systems.
• Analyze network architectures, cloud-native architectures, applications, APIs, microservices, containers, serverless functions, interfaces, and data flows to identify security weaknesses.
• Collaborate with architects and developers to identify achievable security controls and reduce compliance friction before formal assessment.
• Engineer and document vulnerability mitigation strategies and provide technical consultation supporting POA&M corrective actions.
• Develop solutions that reduce system attack surface and improve resiliency without unnecessarily compromising mission capability.
• Translate security requirements into specific technical implementation activities such as MFA, database encryption, secure network zoning, and related controls.
• Apply DoD STIGs, SRGs, and PPSM guidance to system engineering activities.
• Use security telemetry and findings from SIEM, vulnerability scanning, and EDR technologies to recommend architectural and engineering improvements.
• Provide technical mentorship and guidance to ISSMs, ISSOs, developers, and system owners.
• Present cybersecurity risks, architectural findings, mitigation strategies, and recommendations to technical personnel and Government leadership.
• Document customer interactions, systems supported, issues addressed, and technical recommendations as required.

Required Skills, Qualifications and Experience:

• Bachelors degree or equivalent professional experience.
• 10+ years of related experience.
• DoD 8140 Work Role 652 Security Architect Certification requirement (must have at least one of the following): Security X/CASP+CE, CCSP, Cloud+, CISSP, CSSLP, CISM, CISSP-ISSAP, CISSP-ISSIP, CSSLP, and GSEC.
• Must have and maintain a current DoD Top Secret clearance.
• Must reside within a commutable distance of Fort Meade, MD or Chambersburg, PA in order to work a hybrid onsite schedule (4 days onsite weekly).
• Expert-level knowledge of RMF and NIST SP 800-37.
• Expert-level knowledge of NIST SP 800-53 security and privacy controls.
• Strong security architecture and systems-security engineering experience.
• Practical experience applying DoD STIGs, SRGs, and PPSM requirements.
• Experience converting compliance requirements into practical engineering solutions.
• Hands-on engineering/configuration experience with enterprise security technologies, including:

o SIEM platforms such as Splunk or Elastic.
o Vulnerability scanners such as ACAS/Nessus.
o Endpoint Detection and Response (EDR) technologies.
Knowledge of traditional and cloud-native architectures.
Ability to support multiple concurrent systems, projects, and development efforts.
Strong written, verbal, consulting, and presentation skills.