Information Systems Security Engineer (ISSE)

Responsibilities & Qualifications

• Architect, engineer, and implement technical security controls directly into system designs, operating systems, cloud environments, and networks to satisfy RMF Step 2 requirements.
• Apply, test, and enforce DISA STIGs, SRGs, and CIS benchmarks across Microsoft, RHEL operating systems, cloud assets, and virtualization infrastructure using both automated and manual validation methods.
• Deploy, configure, and execute automated vulnerability scanners—including ACAS/Tenable Nessus and the SCAP Compliance Checker (SCC)—to discover flaws and engineer technical, code-level, or system-level mitigations.
• Conduct deep-dive SIAs on all proposed system configuration changes, software updates, and network modifications to maintain a secure baseline.
• Author the technical "How-To" implementation statements within System Security Plans (SSPs) and generate verifiable engineering artifacts to prove control compliance.
• Analyze ACAS and SCAP raw scan outputs to determine residual risk, construct technical remediation pathways, and engineer custom workarounds for system-critical components that cannot be STIGed.
• Own the technical execution of Plan of Action and Milestones (POA&M) items, implementing patches, configuration changes, or architectural adjustments to close security gaps.
• Design, implement, and automate technical ISCM capabilities, including log aggregation, SIEM integration, and host-based security tools.
• Populate and maintain technical evidence, security control mappings, and network boundary diagrams within eMASS to support ongoing RMF accreditation.
• Act as the primary technical security liaison to software developers, system administrators, and network engineers to embed security into the development and operations pipelines.
• Engineer, validate, and audit Next-Generation Firewall (NGFW) rule architecture across on-prem and cloud boundaries, verifying application-layer filtering (App-ID), stateful inspection, and automated rule recertification workflows.
• Design, maintain, and validate host security baselines (ESS, EDR/XDR, Tanium), implementing behavioral detection, host-based firewall policies, Data Loss Prevention (DLP), and rapid host-containment procedures.
• Align system architectures with DoD Zero Trust pillars by engineering software-defined perimeters (SDP), micro-segmentation boundaries, and integrations between Policy Decision Points (PDP) and Policy Enforcement Points (PEP).
• Implement identity federation, PKI/CAC authentication, SAML 2.0, OAuth2, and OIDC, while architecting Privileged Access Management (PAM) controls, just-in-time (JIT) access, and Attribute-Based Access Control (ABAC) models.
• Configure and maintain secure log transport pipelines (Syslog-ng, Logstash), design SIEM/SOAR ingestion schemas, parsing engines, and correlation alert logics, and integrate NetFlow, Zeek, and NDR telemetry feeds.
• Review and validate Software Bills of Materials (SBOMs) and perform hardware/software provenance assessments in strict compliance with DoDI 5200.44 and Section 889 covered telecommunications prohibitions.
• Establish automated continuous monitoring (ConMon) pipelines, integrating continuous threat scanning, real-time risk scoring, and automated compliance telemetry into organizational dashboards.

• Ten (10) or more years of experience.
• BS/BA
• Top-Secret clearance required with SCI or SCI eligibility.
• DoD 8570 IAM Level II or III compliant certification and computing environment certifications required.

Overview

We are seeking an ISSE to join our Prime Contract with the Defense Threat Reduction Agency.

TekSynap is a fast-growing high-tech company that understands both the pace of technology today and the need to have a comprehensive well planned information management environment. “Technology moving at the speed of thought” embodies these principles – the need to nimbly utilize the best that information technology offers to meet the business needs of our Federal Government customers.

We offer our full-time employees a competitive benefits package to include health, dental, vision, 401K, life insurance, short-term and long-term disability plans, vacation time and holidays.

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The safety and health of our employees is of the utmost importance. Employees are required to comply with any vaccination requirements mandated by contract, applicable law or regulation.

Many positions require specific certifications and/or the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. Applicants who accept an offer of employment may be subject to investigations performed by TekSynap and/or the Government to verify the candidate meets the required qualifications and other eligibility requirements.

Additional Job Information

WORK ENVIRONMENT AND PHYSICAL DEMANDS

The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of the job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

• Location: Fort Belvoir, VA
• Type of environment: Professional office environment
• Noise level: Medium
• Work schedule: Schedule is Monday – Friday core hours 0800-1600.
• Amount of Travel: 1-2 weeks/annually (rare deployment occasions and training attendance)

PHYSICAL DEMANDS

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee is regularly required to use hands to handle, feel, touch; reach with hands and arms; talk and hear. The employee is regularly required to stand; walk; sit; climb or balance; and stoop, kneel, crouch, or crawl. The employee is regularly required to lift up to 10 pounds. The employee is frequently required to lift up to 25 pounds; and up to 50 pounds. The vision requirements include close vision, distance vision, peripheral vision, depth perception, and ability to adjust focus.

WORK AUTHORIZATION/SECURITY CLEARANCE

• Must be a US Citizen
• Must possess and maintain an active Top Secret security clearance with SCI eligibility.

WAGE INFORMATION

Target salary range: $145,000.00 - $170,000.00. The salary range displayed is an estimate only and is not a guarantee of compensation or salary, and will be determined on several factors regarding the individual’s particular combination of education, knowledge, skills, competencies and experience, as well as contract parameters and organizational requirements. The displayed salary is one component of the total compensation package for employees.

OTHER DUTIES

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

TekSynap is a drug-free workplace. We reserve the right to conduct drug testing in accordance with federal, state, and local laws. All employees and candidates may be subject to drug screening if deemed necessary to ensure a safe and compliant working environment.

EQUAL EMPLOYMENT OPPORTUNITY

In order to provide equal employment and advancement opportunities to all individuals, employment decisions will be based on merit, qualifications, and abilities. TekSynap does not discriminate against any person because of race, color, creed, religion, sex, sexual orientation, gender identity, protected veteran status, national origin, disability, age, genetic information or any other characteristic protected by law (referred to as “protected status”). This nondiscrimination policy extends to all terms, conditions, and privileges of employment as well as the use of all company facilities, participation in all company-sponsored activities, and all employment actions such as promotions, compensation, benefits, and termination of employment.TekSynap is committed to ensuring that our online application process provides an equal employment opportunity to all job seekers, including individuals with disabilities. If you believe you need a reasonable accommodation in order to search for a job opening or to submit an application, please View email address on click.appcast.io for assistance.