Junior Information Systems Security Officer – ISSO

Amentum

. Provide cybersecurity engineering support for development and maintenance of MDA IC common use systems in RMF using eMASS .

Posted 10/23/2026full-timeUnited StatesJunior💰 $90,000 - $120,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Cybersecurity Engineering, particularly in Risk Management Framework (RMF) processes and eMASS tool utilization. Capable of managing ATO packages, conducting Continuous Monitoring (ConMon) activities, and supporting cybersecurity inspections while maintaining compliance with DoD standards.

Highest-signal resume keywords

Cybersecurity EngineeringEMASS Tool ProficiencyDoD 8570.01 IAT Level II CertificationRisk Management Framework (RMF) KnowledgeATO Package Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Cybersecurity EngineeringRisk Management Framework (RMF)ATO Package ManagementContinuous Monitoring (ConMon)Security Control DocumentationNetworking KnowledgePolicy and Procedure DraftingControl Validation TestingCustomer Responsibility MatricesCND Tools Experience

Tools & Technologies

EMASSBMC HelixACASE-STIG

Certifications & Qualifications

DoD 8570.01 IAT Level II CertificationCompTIA Security+ CE Certification

Industry Keywords

ATO RenewalsIATT RenewalsPlans of Action and Milestones (POA&Ms)Cybersecurity InspectionsInformation Assurance

Tech Stack

Tools & technologies

Cyber Security

About the role

Key responsibilities & impact

Provide cybersecurity engineering support for development and maintenance of MDA IC common use systems in RMF using eMASS
Review, update, quality-check, and process ATO renewals
Review and process IATT renewals
Review Control and Package workflows using MDA’s eMASS instance
Maintain Plans of Action and Milestones (POA&Ms), including AO Liens
Produce and maintain weekly, monthly, and quarterly reports as needed by the ISSM
Support MDA Control Validation Testing (CVTs) by tasking and tracking deliverables to ensure timely completion
Support MDA cybersecurity inspections, including MCTO, CCRI, CORA, and ESM
Document and review Security Controls and Control Correlation Identifier (CCI) answers
Interface with the Admin/ISSM and other ISSOs to provide coordinated responses on IC common use systems
Participate in technical discussions with Government and Contract customers
Perform Continuous Monitoring (ConMon) activities on assigned systems
Support senior ISSOs in completing cybersecurity and information assurance tasks for the Missile Defense Agency

Requirements

What you’ll need

1 or more years of directly related experience
Direct experience with eMASS
Current DoD 8570.01 IAT Level II Certification, e.g. CompTIA Security+ CE Certification
Ability to work on site 5 days per week
Active DoW Secret Security Clearance
Demonstrable experience with ATO packages, including Customer Responsibility Matrices for IaaS, PaaS, and SaaS
Demonstrable knowledge of the Risk Management Framework (RMF)
Demonstrable knowledge of the Enterprise Mission Assurance Support Service (eMASS) tool
Fundamental networking knowledge
Experience with BMC Helix (desired)
Fundamental project management knowledge (desired)
Experience drafting and peer reviewing policy and procedure (desired)
Experience with CND tools such as ACAS and E-STIG (desired)
Resume submitted in month and year format with the application

Benefits

Comp & perks

Health, dental, and vision insurance
Paid time off and holidays
Retirement benefits, including 401(k) matching
Educational reimbursement
Parental leave
Employee stock purchase plan
Tax-saving options
Disability and life insurance
Pet insurance