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About the Role

The Information System Security Manager (ISSM) provides cybersecurity oversight, governance, and compliance management for the organization’s SIPRNet circuit and associated classified information systems. This role ensures compliance with DoD, IC, and federal cybersecurity requirements, maintains system accreditation, and leads security operations for mission-critical classified environments.

Responsibilities

Lead and manage the cybersecurity program for the SIPR circuit and all connected classified systems.
Ensure full compliance with DoD, Intelligence Community, and federal cybersecurity policies including RMF, NIST SP 800-53, CNSSI 1253, and applicable DoD instructions.
Oversee the development, documentation, review, and maintenance of RMF artifacts including SSPs, CONOPS, POA&Ms, SARs, and continuous monitoring records within eMASS.
Conduct or supervise risk assessments, vulnerability evaluations, and threat analysis.
Identify residual risks and recommend appropriate mitigation strategies.
Maintain the system’s Authorization to Operate (ATO) and ensure all continuous monitoring requirements are met.
Review and approve security-relevant configuration or software changes affecting the SIPR network.
Validate implementation of STIGs, configuration baselines, security patches, and vulnerability remediation.
Coordinate with network administrators, ISSOs, engineers, and security teams to ensure system hardening and compliance activities are executed correctly.
Ensure proper handling, transmission, and storage of classified data.
Validate appropriate boundary protection mechanisms, enclave configurations, and physical security requirements for SIPR systems.
Maintain accurate, auditable security documentation and system records.
Prepare required cybersecurity reports for inspections, audits, and system reviews.
Lead remediation efforts addressing audit findings, compliance gaps, and security vulnerabilities.
Manage cybersecurity incident response procedures for the SIPR environment.
Coordinate reporting to government authorities as required by DoD policy.
Oversee account management, auditing, and access control enforcement.
Ensure all SIPR users complete required cybersecurity training and understand proper classified handling procedures.
Brief leadership, participate in meetings, and engage with auditors, AOs/DAOs, and other cybersecurity stakeholders.
Communicate technical security issues clearly to both technical and non-technical audiences.

Requirements

Active Secret or TS/SCI (as required by the position/organization)
Deep understanding of DoD SIPRNet architecture and classified network handling rules.
Proficiency in network security principles including firewalls, IDS/IPS, encryption technologies, and cross-domain constraints.
Experience managing secure enclaves, boundary protections, and classified physical security requirements.
Hands-on experience with vulnerability scanning and auditing tools such as ACAS/Nessus.
In-depth knowledge of DoD Risk Management Framework lifecycle.
Strong ability to create, review, and maintain RMF control evidence and accreditation documentation.
Experience interacting with AOs, cybersecurity compliance teams, and inspection authorities.
Excellent written and verbal communication skills.
Ability to prepare and deliver leadership briefings.
Highly organized, detail-oriented, and capable of managing multiple concurrent tasks.
DoD 8570/8140 IAM Level II or III (e.g., CAP, CISSP, CASP+, CISM, GSLC, or equivalent).
Bachelor’s degree from an accredited university, OR CNSSI 4012 certificate OR ADQ GA7.
3–5 years of experience as an ISSM, ISSO, or similar cybersecurity leadership role.
Completion of one of the following is required or strongly preferred: NEC 2779 (CIN: A‑531‑0009), NEC 3372 (CIN W‑3B‑1500, EKMS Manager), A‑4C‑1340 (KMI)
ACAS, Nessus, audit tools, and configuration management systems.

Skills

Cybersecurity
Governance
Compliance Management
SIPRNet
Classified Information Systems
DoD Cybersecurity Requirements
IC Cybersecurity Requirements
Federal Cybersecurity Requirements
System Accreditation
Security Operations
Risk Management Framework (RMF)
NIST SP 800-53
CNSSI 1253
DoD Instructions
System Security Plans (SSPs)
Concept of Operations (CONOPS)
Plans of Action and Milestones (POA&Ms)
Security Assessment Reports (SARs)
eMASS
Risk Assessments
Vulnerability Evaluations
Threat Analysis
Authorization to Operate (ATO)
Continuous Monitoring
System Hardening
Change Management
Security Information and Event Management (SIEM)
Intrusion Detection/Prevention Systems (IDS/IPS)
Encryption Technologies
Cross-Domain Constraints
Boundary Protection
Enclave Configurations
Physical Security
Audit Tools
Configuration Management Systems
Incident Response
Access Control
User Training
Leadership Briefings
Technical Communication
Network Security
Firewalls

Location

Austin, TX

Work Type

Onsite

Experience Level

3-5 years

Education Level

Bachelor's degree
CNSSI 4012 certificate
ADQ GA7

Benefits

Competitive Paid Time Off
Comprehensive Medical, Dental and Vision Insurance
Employee Assistance Programs
Flexible Spending Accounts (Medical, Dependent Care & Commuter)
Company-paid Short-Term, Long-Term, Life and AD&D Insurance
401(k) match
Tuition Reimbursement
Paid Certifications

About the Company

Decision Technologies, Inc. provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.
This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.

Equal Opportunity

Decision Technologies, Inc. provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.
This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.