Information System Security Engineer (ISSE)

Ngpartners; San Antonio (TX); Hybrid; USD 141,000 - 184,000; Full time

Benefits offered by this job

Health insurance

Life insurance

Disability insurance

Tuition assistance

Paid leave

Job summary

Ngpartners is seeking an Information System Security Engineer (ISSE) to design and assess complex system architectures across enclaves with varying data protection requirements. The role supports DoD RMF processes and STIGs, with a hybrid schedule and location flexibility.

Key duties include authoring authorization packages, risk assessment of COTS/GOTS components, vulnerability management, and guiding development teams to meet security posture objectives while collaborating with government and

Qualifications

• Active Secret U.S. Government Security Clearance required.
• 9+ years as an ISSE on large multi‑tiered programs; or 7 years with a Masters.
• Experience implementing DoD system accreditation processes (DIACAP acceptable and RMF preferred).
• Working knowledge of TCP/IP protocols, computer architectures, and networks.
• Familiarity with NIST SP 800‑53 and RMF/DIACAP concepts.
• DoD 8140 IAT Level II (SSCP, Security+, CCNA‑Security, or GSEC).
• Experience with DISA STIGs/SRGs and vulnerability management tools.
• Ability to work independently and in a team; hybrid work with Columbia, MD office.

Responsibilities

• Design system/network architectures across enclaves with varying data protections.
• Assess risk of integrated open source and COTS/GOTS components.
• Utilize vulnerability management systems and automated scanning tools.
• Prepare authorization documents per DoD policy and RMF requirements.
• Support security planning, risk analysis, and risk management for programs.
• Advise development teams to meet security posture requirements.
• Collaborate with external systems and architectures to enforce trusted relationships.
• Apply DISA STIGs and SRGs in operations.

Skills

Security clearance

Team collaboration

Analytical thinking

Communication

Education

Bachelor's degree in a related field

Master's degree in a related field

Tools

eMASS

Xacta

STIGs tooling

Job description

9463 Information System Security Engineer (ISSE)

(9463) ISSE

Estimated Salary: The estimated salary range for this position is between $141,000 and $184,000 DOE

About our client: Our client delivers high‑quality solutions and services to IC, DoD, Federal, and commercial customers. Their security, software, and systems engineers and architects work at the forefront of national challenges, solving some of the most complex problems in cyber analytics and data science.

Our Client’s Values Professionalism and a mission‑centric mindset are core to how they operate, shaping both their work and the way they conduct themselves.

They take pride in fostering a culture of learning, growth, and excellence — for their employees, their partners, and the customers they serve.

Description

The candidate will perform system or network designs that encompass multiple enclaves, to include those with differing data protection/classification requirements. The candidate should understand distributed architectures and cloud-based systems for big data applications. Must be willing to work a hybrid schedule and be flexible to accommodate any schedule changes as needed.

Requirements

• Will create, review and edit authorization documentation for completeness and accuracy in accordance with federal and DoD policy.
• Thoroughly understand and be able to implement DoD RMF system accreditation processes.
• Assess use case and operational risk of integrated open source, and GOTS/COTS software components.
• Will use vulnerability management systems, automated security scanning tools, and system accreditation record systems.
• Must be able to grasp new concepts, facilitate information exchanges for data gathering, and collaborate with diverse audiences.
• Must be able to interpret and apply Defense Information Systems Agency (DISA) Security Technical Implementation Guides (STIGs) and Security Requirements Guides (SRGs).
• Will follow established processes where applicable, and establish and execute defensible processes where none are prescribed.
• Provide security planning, assessment, risk analysis, and risk management support.
• Recommend system‑level solutions to resolve security requirements and guide the development team in meeting the security posture requirements.
• Support the Government in the enforcement of the design and implementation of trusted relationships among external systems and architectures.
• Must apply existing knowledge of IA policy, procedures, and workforce structure to design, develop, and implement secure networking, computing, and enclave environments.
• Must be able to interact well with others to complete work.
• Other duties as assigned.

Minimum Qualifications

• Clearance Requirement: Must currently have and maintain an active Secret U.S. Government Security Clearance; U.S. Citizenship required.
• 9+ years of experience as an ISSE with large multi‑tiered programs and Bachelors in related field; OR 7 years relevant experience with Masters in related field; OR High School Diploma or equivalent and 13 years relevant experience.
• Experience implementing DoD system accreditation processes (DIACAP acceptable and RMF preferred).
• A working knowledge of TCP/IP suite of protocols and services, computer architectures, and network topologies is required.
• An understanding of the underlying framework, control inheritance, and artifact generation utilizing the NIST SP 800‑53.
• DoD 8140 compliance with IAT Level II (SSCP, Security+, CCNA‑Security, or GSEC certification).
• Experience with DISA STIGs and SRGs, vulnerability management systems, mitigation and compliance processes, and reviewing results from automated security scanning tools.
• The ability to work independently and as part of a team is needed.
• Prior hands‑on experience navigating workflows, uploading artifacts, managing POA&Ms in eMASS & Xacta or equivalent RMF system of record.
• Must be able to work in a hybrid environment, spending an average of 1‑2 days per week at our Columbia, MD office. Flexibility is essential to adapt to schedule changes as needed.

Preferred Requirements

• CISSP‑ISSEP is highly desired

Compensation

Our client is building a team of like‑minded individuals who aren’t afraid to work hard and support one another to achieve exceptional results. Fostering an environment where high‑calibre employees can shine means offering meaningful benefits and support both in the office and beyond.

The benefits include health insurance, life insurance, disability insurance, financial and retirement plans, paid leave, professional development, tuition assistance, and dependent care.

Salary varies based on location, education, skills, experience, and contract‑specific affordability. The estimated salary range for this position is $141,000 and $184,000, representing one component of our client’s overall compensation package.