Information Systems Security Engineering (ISSE) with Security Clearance

Overview Abile Group has an exciting and challenging opportunity for an Information Systems Security Engineer (ISSE) supporting a DoD Customer's Classified Network Services. The mission will include Operations, Compliance, Cyber Security, Customer Service, and Engineering. The right Information Systems Security Engineer candidate will possess the below skills and qualifications and be ready to handle all responsibilities independently and professionally. Responsibilities * Designs, implements, and maintains enterprise security architecture aligned with NIST RMF, DoD STIGs, CIS benchmarks, and organizational cybersecurity policies. * Performs security engineering activities across system development lifecycle (SDLC), including requirements analysis, system design reviews, security testing, and accreditation support. * Implements vulnerability management processes utilizing Tenable Nessus, ACAS, and Qualys to identify, assess, and remediate system vulnerabilities. * Integrates cybersecurity requirements into Windows and Linux server environments, cloud infrastructure, virtualization platforms, and containerized applications. * Supports incident response and forensic investigations by analyzing security logs, SIEM alerts, network traffic, and endpoint telemetry using Splunk Enterprise. * Develops automation scripts using PowerShell, Bash, and Python to streamline vulnerability remediation, account auditing, compliance reporting, and security monitoring tasks. * Collaborates with system administrators, network engineers, ISSOs, and application teams to remediate security findings and implement secure configuration baselines. * Performs security impact analysis for system changes, software deployments, and infrastructure upgrades to ensure continued compliance and operational security. * Engineers endpoint protection and hardening solutions utilizing Trellix ePO - On-prem, host-based firewalls, and application whitelisting technologies. * Evaluates and implements cybersecurity tools and technologies to improve system security posture, continuous monitoring, and threat detection capabilities. * Produces technical security documentation, architecture diagrams, standard operating procedures (SOPs), and executive-level risk assessment reports. * Experience administrating, configuring, and troubleshooting core modules such as Enterprise Password Vault (EPV), Password Vault Web Access (PVWA), Central Policy Manager (CPM), and Privileged Session Manager (PSM) in CyberArk. * Monitors, analyzes, and detects cyber events and incidents within information systems and networks under general supervision. * Assists with integrated, dynamic cyber defense, coordinates and maintains security toolsets to support organizations' continuous monitoring and ongoing authorization programs. * Establishes a framework by which cyber risk can be measured and quantified in the marketplace. * Determines security requirements by evaluating business strategies and requirements; researching information security standards; conducting system security and vulnerability analyses and risk assessments; studying architecture/platform; identifying integration issues; preparing cost estimates. * Implements security systems by specifying intrusion detection methodologies and equipment; directing equipment and software installation and cali bration; preparing preventive and reactive measures; creating, transmitting, and maintaining keys; providing technical support; completing documentation. Verifies security systems by developing and implementing test scripts. * Maintains security by monitoring and ensuring compliance to standards, policies, and procedures; conducting incident response analyses; developing and conducting training programs. * Responsible for the design, development, implementation, and integration of a DoD IA architectures, systems, or system components for use within computing, network, and enclave environments. * Ensures that the architecture and design of development and operational systems are functional and secure. * This includes designs for program of record systems and special purpose processing nodes with platform IT interconnectivity. Qualifications Clearance Required: TS/SCI. Degree and Years of Experience: 5 to 8 years with BS/BA or 3 to 5 years with MS/MA or 0 to 2 years with PhD. Required Certifications: * Must be DoD 8570.1-M/8140 IAT Level III certification (SecurityX (CASP), GCIH, CISA, CISSP) compliant. Required Skills: * Strong background in networking (TCP/IP, firewalls, VPNs), cloud security (AWS/Azure), Kubernetes, and DevSecOps. * Deep understanding of NIST SP 800-161, NIST RMF, FedRAMP, Common Criteria, ATO package development, and cybersecurity compliance (STIGs). * Hands-on experience managing and deploying Tenable Nessus, CyberArk, Trellix, Splunk Enterprise, VMware vSphere, GitLab, Microsoft Windows Server, Red Hat Enterprise Linux and Ubuntu Linux. * Experience with scripting and automation with Powershell, Python, Bash and Ansible. * Proven experience in leading projects and mentoring junior ISSE's. * Present technical briefings to leadership. Salary Range: $104,814.71 - $161,320.10 The estimate displayed represents the typical salary range for this position. Salary is determined by factors including, but not limited to geographic location, position requirements, Federal Government contract labor categories, relevant prior work experience, specific skills and competencies, education, and certifications. Salary is just one component of Abile Group's total compensation package for employees. Other rewards may include annual bonuses, short- and long-term incentives, and program-specific awards. Abile Group provides a comprehensive package of benefits including employer subsidized Medical and Dental, generous PTO, and 401(k) with Employer match after 90 days of employment. About Abile Group, Inc. Abile Group, founded in July 2004 to support the Intelligence Community and its contractors across Enterprise Analytics, IT && Systems Engineering, and Program && Project Management, merged with Valiant Solutions in January 2026 - an established provider of cybersecurity technologies and services for Federal Agencies since 2005. Together, this partnership creates a stronger, more integrated cybersecurity organization with expanded opportunities for employees, deeper technical collaboration, and a unified mission. With significant experience serving the Federal Government, we remain dedicated to our employees and clients and seek high‑performing professionals who excel at providing guidance, developing solutions, and delivering implementation support that blends industry best practices with client expertise and Abile's broad technical capabilities. Hiring Statement Abile is committed to hiring the most qualified and best fit person for the job - always has, always will. Anyone requiring reasonable accommodations should email with requested details. A member of the HR team will respond to your request within 2 business days. Please review our current job openings and apply for the positions you believe may be a fit. If you are not an immediate fit, we will also keep your resume in our database for future opportunities.