Information Systems Security Engineer (ISSE)

Dobbs Defense Solutions; Landover (MD); On-site; USD 120,000 - 170,000; Full time

Job summary

Dobbs Defense Solutions is seeking an experienced Information Systems Security Engineer (ISSE) to support a federal customer in Washington, DC. The ISSE will design, implement, and maintain secure enterprise information systems while ensuring DoD/cyber requirements are met.

Collaboration with ISSOs, admins, and application teams is essential. The role emphasizes RMF, STIGs, vulnerability management, and automation using PowerShell, Python, Bash, and Ansible across Windows, Linux, and cloud

Qualifications

• Active Top Secret clearance with SCI eligibility and IAT Level III certification.
• Extensive experience with RMF, FedRAMP, DoD STIGs, ATO packaging, and cybersecurity compliance.
• Hands-on administration of Nessus, CyberArk, Splunk, VMware, Linux OS, and cloud security.
• Automation development using PowerShell, Python, Bash, and Ansible to improve security operations.
• Experience leading technical projects and briefing senior leadership.

Responsibilities

• Design, implement, and maintain secure enterprise security architectures aligned with RMF and DoD standards.
• Perform security engineering across SDLC, including requirements analysis, reviews, testing, and accreditation support.
• Manage vulnerability assessment and remediation using Nessus, ACAS, Qualys, and Splunk; support incident response.
• Develop automation to improve compliance reporting, remediation, monitoring, and auditing.
• Engineer and maintain secure Windows/Linux environments, cloud infrastructure, virtualization, containers, and CyberArk.
• Produce security documentation, risk assessments, architecture diagrams, SOPs, and executive briefings; mentor juniors.

Skills

PowerShell

Python

Bash

Ansible

Mentoring

Technical briefings

Education

Bachelor's degree

Master's degree

Tools

Nessus

ACAS

Qualys

Trellix ePO

Splunk Enterprise

VMware vSphere

GitLab

Windows Server

Red Hat Enterprise Linux

Ubuntu Linux

CyberArk

Job description

Our Mission

At Dobbs Defense, we deliver mission‑centric IT, Cyber, and data analytics solutions for our government and commercial clients through the convergence of automation, innovation, training, and education. Our vision is to deliver high‑quality IT, cybersecurity, and data analytics solutions through proven and innovative methods.

Job Description

Dobbs Defense Solutions is seeking an experienced Information Systems Security Engineer (ISSE) to support a federal customer in Washington, DC. The ISSE will be responsible for designing, implementing, and maintaining secure enterprise information systems while ensuring compliance with Department of Defense (DoD) and federal cybersecurity requirements. This role partners closely with system administrators, network engineers, Information System Security Officers (ISSOs), and application teams to strengthen cybersecurity posture, support continuous monitoring, and protect mission‑critical systems.

Duties

• Design, implement, and maintain enterprise security architectures aligned with NIST Risk Management Framework (RMF), DoD STIGs, CIS Benchmarks, and organizational cybersecurity policies.
• Perform security engineering throughout the System Development Life Cycle (SDLC), including security requirements analysis, system design reviews, security testing, accreditation support, and security impact assessments.
• Manage vulnerability assessment and remediation efforts using tools such as Tenable Nessus, ACAS, Qualys, Trellix ePO, and Splunk Enterprise while supporting incident response and continuous monitoring activities.
• Develop automation solutions using PowerShell, Python, Bash, and Ansible to improve compliance reporting, vulnerability remediation, security monitoring, and account auditing.
• Engineer and maintain secure Windows and Linux environments, cloud infrastructure, virtualization platforms, containerized applications, and CyberArk Privileged Access Management (EPV, PVWA, CPM, and PSM).
• Produce technical security documentation, risk assessments, architecture diagrams, standard operating procedures (SOPs), and executive‑level briefings while mentoring junior Information Systems Security Engineers.

Qualifications – Required Education and Experience

• Bachelor's degree with five (5) years of relevant experience; Master's degree with three (3) years of relevant experience; or nine (9) years of equivalent experience in lieu of a degree.
• Active Top Secret clearance with SCI eligibility and current DoD 8570.1‑M IAT Level III certification (SecurityX/CASP+, CISSP, CISA, GCIH, or equivalent).
• Demonstrated experience with NIST RMF, FedRAMP, DoD STIGs, ATO package development, cybersecurity compliance, networking, cloud security (AWS/Azure), Kubernetes, and DevSecOps.
• Hands‑on experience administering Tenable Nessus, CyberArk, Trellix, Splunk Enterprise, VMware vSphere, GitLab, Microsoft Windows Server, Red Hat Enterprise Linux, and Ubuntu Linux.
• Experience leading technical projects, mentoring junior cybersecurity professionals, developing automation through PowerShell, Python, Bash, and Ansible, and presenting technical briefings to senior leadership.

Working Environment

Onsite

Required Clearance

Active Top Secret/SCI

Our Equal Employment Opportunity Policy

Dobbs Defense Solutions is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), sexual orientation, gender or gender identity (except where gender is a bona fide occupational qualification), gender expression and transgender status, national origin, ancestry, age, disability, military or veteran status, marital or domestic partner status, genetic information, citizenship, low‑income status, or any other status or characteristic protected by applicable law. We are committed to equal employment opportunity in all decisions related to employment, promotion, wages, benefits, and all other privileges, terms, and conditions of employment.

Salary Range

Pay range information will be disclosed consistent with applicable state and local pay transparency laws once available. For this position, the anticipated salary range will depend on the selected labor category, candidate qualifications, experience, and overall fit for the role.