ISSO/ISSE – TS/SCI Clearance, Defense-In-Depth Security

Constellation Technologies, Inc; Hanover (MD); On-site; USD 120,000 - 190,000; Full time

Benefits offered by this job

Healthcare options with employer-paid%

Dental insurance

Vision insurance

Life insurance

Disability insurance

Training reimbursement

HSA funding

401(k) with company match

Job summary

Constellation Technologies, Inc. seeks a security engineer with TS/SCI clearance to lead and support RMF-based security operations for large IT programs. You will help maintain SSPs, enforce policies, and coordinate security assessments across domains.

The role requires deep knowledge of NIST 800-53, defense-in-depth, and experience in enterprise security architecture. A high level of diligence and collaboration with DoD stakeholders is essential.

Qualifications

• Must have TS/SCI clearance with active polygraph.
• Must be a US citizen.
• This role accepts multiple experience levels; 2 of last 5 years related to ISSO/ISSE or security engineering.
• Level 04 requires 15+ years; Level 03 requires 12+; Level 02 requires 9+; Level 01 requires 6+ years.
• DoD 8570 compliance with IAT Level I or higher.
• Experience with ISSO/ISSE and defense-in-depth architecture.
• Knowledge of RMF and NIST 800-53 controls.
• Familiarity with STE/STN requirements and security toolsets.
• Experience evaluating security of software/architectures and SSPs.

Responsibilities

• Perform day-to-day security operations for large, complex systems.
• Prepare and maintain SSPs and other security documentation.
• Propose, coordinate, implement, and enforce information systems security policies.
• Support security audits and ongoing accreditation activities.

Skills

TS/SCI clearance

US citizenship

IAT Level I+

ISSO/ISSE experience

RMF/NIST 800-53

Defense-in-Depth

security operations

security policies

Education

High School Diploma

Tools

Nessus

NMAP

Wireshark

Job description

Constellation Technologies, Inc. seeks a security engineer with TS/SCI clearance to lead and support RMF-based security operations for large IT programs. You will help maintain SSPs, enforce policies, and coordinate security assessments across domains.

The role requires deep knowledge of NIST 800-53, defense-in-depth, and experience in enterprise security architecture. A high level of diligence and collaboration with DoD stakeholders is essential.