Senior RMF Cybersecurity Engineer (Top Secret, ICD 503) - Aberdeen Test Center

CyberMyte, LLC; Aberdeen (MD); On-site; USD 135,000 - 155,000; Full time

Job summary

CyberMyte, LLC seeks a Senior RMF Cybersecurity Engineer to handle Top Secret authorization work under ICD 503 at Aberdeen Proving Ground. The role includes building and maintaining TS evidence, POA&Ms, and supporting assessments while backing up on Secret and below systems as needed.

The position is fully onsite with Army-driven start dates and a four-year option period. You will coordinate with government staff and CyberMyte leadership to ensure bid-ready readiness and compliance throughout

Qualifications

• Active Top Secret clearance (Tier 5)
• 3+ years supporting Top Secret lifecycle documentation
• 5+ years supporting RMF lifecycle reporting and reconciliation
• Experience with ICD 503 and DoDI 8510.01
• Experience with Windows/Linux/Apple environments

Responsibilities

• Identify, assess, document and audit cybersecurity requirements for Top Secret systems under ICD 503.
• Maintain lifecycle documentation for Top Secret environments including packages, evidence and POA&Ms.
• Support assessments and authorization activities for Top Secret systems.
• Run continuous monitoring and support Security Control Assessors as needed.

Skills

Top Secret clearance

Documentation

Coordination with government staff

Onsite work

RMF lifecycle knowledge

Tools

eMASS

NIST SP 800-53

DoDI 8510.01

Job description

Senior RMF Cybersecurity Engineer (Top Secret, ICD 503)

Top Secret authorization role under ICD 503. U.S. Army Aberdeen Test Center, Aberdeen Proving Ground, Maryland. Fully onsite.

Read this part first.

This job depends on CyberMyte winning the contract. The Army is buying this work through sealed bidding, and your resume goes in with our bid. The Army checks every resume against hard minimums, and one resume that misses a minimum can sink the whole bid. So before we submit, we need to confirm you meet every gate below, and we need your written permission and a signed letter of intent. The Army expects to award in November 2026. If we do not win, there is no job. We will tell you either way.

This is the surge seat. The Army turns it on when it needs Top Secret support, so the start date is not fixed. We still name you in the bid. If you need a guaranteed start date, tell us up front.

What this job actually is

You handle authorization work for ATC's Top Secret systems under ICD 503. When the Top Secret work is light, you back up the RMF team on Secret and below systems.

Roughly, and it will depend on when the Army needs you:

• Most of your time is Top Secret lifecycle documentation. Building and maintaining the packages, evidence and POA&Ms for Top Secret systems.
• A good share is assessment support. Getting systems ready for assessment and working findings to closure.
• The rest is backing up the RMF team on Secret and below systems across the four ATC networks.

This job is a good fit if

• You have done Top Secret authorization work under ICD 503 and know how it differs from DoD RMF.
• You are fine with a start date that depends on Army demand.
• You write things down without being asked.

This job is not a good fit if

• You want remote or hybrid. Telework on this contract is situational only.
• You need a guaranteed start date.
• Your Top Secret clearance is not active today.

About the contract

Aberdeen Test Center plans, runs and reports developmental and production tests for the Army, the rest of DoD and outside customers. It sits on roughly 70,000 acres of land and water at Aberdeen Proving Ground, with about 2,500 civilian, military and contractor staff.

The contract covers cybersecurity engineering and DoD Risk Management Framework support for four ATC networks: the ATC Local Area Network, the Logically Isolated Network, the Secure Test Environment and the Test and Evaluation Network. Secret and below systems follow DoDI 8510.01. Top Secret systems follow ICD 503. It is one base year plus four option years. The team is two core positions plus two surge positions the Army can turn on when it needs them. CyberMyte is bidding as the prime contractor.

Who directs your work. You report to CyberMyte. The ATC Contracting Officer's Representative and Technical Point of Contact are the Government's points of contact for the work itself, and you will coordinate with them and the ATC cybersecurity staff on technical priorities. Time, leave, schedule changes, task priority, pay and performance all run through CyberMyte.

Responsibilities

• Identify, assess, analyze, document and audit cybersecurity requirements for Top Secret systems under ICD 503.
• Maintain lifecycle documentation for Top Secret environments, including packages, evidence and POA&Ms.
• Support assessments and authorization activities for Top Secret systems.

RMF lifecycle (backup)

• Categorize ATC systems and define system boundaries. Gather mission, roles, operating environment and interconnection information.
• Select security controls based on categorization, then implement them on the systems.
• Assess controls and run verification and validation to confirm they work as intended.
• Support Security Control Assessor visits, assessments and other authorization activities.
• Run continuous monitoring to keep each ATO current, including POA&M upkeep and IAVM compliance.

Required qualifications

Citizenship, clearance and certification

• United States citizen. No exceptions for on-installation federal contract work.
• Active Top Secret clearance (Tier 5 investigation), held for the life of the contract.
• CASP+ (now SecurityX) or an equivalent DoD 8570/8140 baseline certification, held when we submit the bid. We cannot bid on a promise to certify later.

Technical experience

• At least 3 years supporting lifecycle documentation for Top Secret environments.
• At least 5 years supporting RMF lifecycle reporting and software and hardware reconciliation.
• Working knowledge of ICD 503, DoDI 8510.01 and NIST SP 800-53.
• Experience managing networks across Windows, Linux and Apple platforms.
• Experience in both unclassified and classified environments, including Secret level systems.

Work style

• Able to work onsite with limited direct supervision from a standing task list.
• Documentation habits that do not require reminders.
• Comfortable coordinating with Government security staff across different classification levels.

Preferred qualifications

• SCI eligibility.
• Experience with eMASS.
• Prior work at Aberdeen Proving Ground or another Army test and evaluation organization.
• CISSP.

How CyberMyte supports this role

We are making these commitments in writing because we learned they matter. We arrange everything below before your first day, not after.

• A written task list on day one. The Performance Work Statement spells out the tasks. You will have them in writing, with priorities, before you walk in.
• The tools to do the job. The Government provides workspace, laptops, program documents, archives and SOPs. We make sure you have them.
• A weekly check-in with company leadership. CyberMyte is small. You will have a direct line to the CEO, not three layers of management.
• Certifications paid, including renewals, and a $5,000 annual training stipend you direct yourself.

Schedule, environment and conditions

ATC works an alternate work schedule under ATC Regulation 690-9, and you work that schedule. Federal holidays are observed. Test support sometimes needs you outside normal hours, at designated ATC sites, with as little as one hour of notice. The contract is firm fixed price with a set number of hours per position, so after-hours work is offset with flexed hours rather than paid at a premium.

The work is fully onsite at Aberdeen Test Center. Telework is situational only, for things like weather closures or an installation closure, and only under a telework plan the COR has approved. The Government provides your workspace, laptop and network access. Reliable personal transportation to the installation is required. CyberMyte handles Army Account Validation System registration and base access processing before your start date. Within 30 days of starting, you complete Antiterrorism Level 1 training, the DoD Cybersecurity Awareness Challenge and the Army IT User Agreement.

Compensation and benefits

• Salary: $135,000 to $155,000 annually, based on experience and clearance status.
• Health: Individual Coverage Health Reimbursement Arrangement. CyberMyte funds a monthly tax-free allowance you direct toward the individual medical, dental and vision plan that fits your family.
• Retirement: 401(k) accepting employee contributions. An employer match is under evaluation for a future plan year and is not offered today.
• Bonus: Annual performance bonus based on individual contribution and company performance.
• Training: $5,000 annual stipend, directed by you. All job-related certifications and renewals reimbursed.
• Time off: Paid time off plus federal holidays.

CyberMyte, LLC is an Equal Opportunity Employer and a Service-Disabled Veteran-Owned Small Business. Veterans and transitioning service members are strongly encouraged to apply.