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Comply Defense
Category: Authorization & Accreditation

Enterprise Mission Assurance Support Service

Also known as:
Simply put

eMASS is a government-owned, web-based application used to manage cybersecurity and authorization activities for information systems. It helps users track and document the steps needed to assess and authorize a system, guiding them through the process in a structured way.

Formal definition

eMASS is a government off-the-shelf (GOTS), web-based application that provides integrated cybersecurity management services and, in most implementations, automates and guides users through the Assess and Authorize (A&A) process as defined by the Risk Management Framework (RMF). It supports Information Assurance program management functions such as documenting security controls, tracking authorization workflows, and managing related artifacts. This entry describes eMASS as a tool and does not cover agency-specific configurations, access requirements, or the substantive RMF steps themselves, which readers should verify against current authoritative sources and the governing organization managing a given eMASS instance.

Why it matters

The Assess and Authorize (A&A) process under the Risk Management Framework (RMF) generates substantial documentation and requires coordinated workflows among system owners, security control assessors, and authorizing officials. eMASS matters because it provides a government-owned platform to manage these cybersecurity activities in a structured, integrated way, helping organizations track security controls, maintain artifacts, and move systems through authorization workflows. For compliance officers and information system security managers, having a consistent tool to document and organize A&A evidence supports repeatability and traceability across an authorization effort.

Because eMASS is described as automating and guiding users through the A&A process as defined by the RMF, it can reduce the administrative friction of managing control documentation and workflow steps. However, using eMASS is not the same as achieving security or authorization. The tool supports the process of assessment and authorization, but it does not by itself confer an Authority to Operate, nor does completing entries in the tool substitute for the substantive assessment of controls or the risk decision made by an authorizing official. Readers should treat eMASS as a management and documentation aid rather than as evidence that a system is secure or compliant.

Entries and workflows within eMASS reflect the specific configuration of the organization managing a given instance. Agency-specific configurations, access requirements, and the substantive RMF steps themselves fall outside the scope of the tool's general description and should be verified against current authoritative sources and the governing organization managing the relevant eMASS instance.

Who it's relevant to

Information System Security Managers and Security Control Assessors
These practitioners use eMASS to document security controls, manage artifacts, and track the assessment activities that feed into an authorization decision. They should understand that recording data in the tool supports the A&A process but does not replace the substantive assessment of controls.
Authorizing Officials and Their Staff
Authorizing officials rely on the workflow and documentation eMASS manages to review a system's authorization package. They should recognize that eMASS supports, but does not make, the risk-based authorization decision, and that an Authority to Operate remains a distinct determination subject to continuous monitoring.
Compliance Officers and Auditors
Those responsible for oversight and audit use eMASS as a central location for tracking authorization workflows and related artifacts. They should confirm agency-specific configurations and access requirements against the organization managing the relevant eMASS instance, since these fall outside the tool's general description.
System Owners and Program Managers
System owners and program managers use eMASS to organize and move their systems through the A&A process in a structured way. They should treat the tool as an aid for managing documentation and workflow rather than as evidence that a system is secure or that compliance obligations have been met.

Inside eMASS

Enterprise Mission Assurance Support Service (eMASS)
A DoD government off-the-shelf (GOTS) web-based application used to support and automate portions of the Risk Management Framework (RMF) process for DoD information systems. It generally serves as a workflow and records tool rather than a security control itself.
RMF Package Management
Functionality for building and maintaining authorization packages, which typically include the System Security Plan (SSP), security control implementation details, assessment results, and the Plan of Action and Milestones (POA&M). Specific package contents can vary by organization and RMF revision.
Security Control Implementation and Assessment Tracking
Capabilities to record how NIST SP 800-53 controls (as tailored for DoD systems) are implemented and to capture assessment status. eMASS documents these determinations but does not perform the assessment or make the authorization decision.
POA&M Tracking
A structured record of identified weaknesses, planned corrective actions, resources, and milestones. eMASS provides a place to manage POA&M items but does not by itself remediate findings.
Workflow and Role-Based Access
Support for RMF roles and approval workflows (such as those associated with system owners, security personnel, and authorizing officials), routing packages through review and decision steps according to the implementing organization's configuration.
Authorization Decision Documentation
A repository for recording authorization-related decisions and supporting artifacts. The tool documents the Authority to Operate (ATO) status but is distinct from the human authorizing official who grants it.

Common questions

Answers to the questions practitioners most commonly ask about eMASS.

Does using eMASS mean my system is automatically compliant or secure?
No. eMASS is a governance, risk, and compliance workflow tool used to document and manage the Risk Management Framework (RMF) process; it is not itself a security control or a guarantee of compliance. Recording control implementation status, assessment results, and artifacts in eMASS supports the authorization process, but the underlying system must actually implement and sustain the controls. Compliance documentation in the tool should not be confused with the effective security of the system, and populated fields do not substitute for validated technical and operational controls.
Once I receive an Authority to Operate (ATO) tracked in eMASS, is the authorization permanent?
No. An ATO recorded in eMASS is time-bound and subject to continuous monitoring conditions. The authorization reflects a point-in-time risk decision by the Authorizing Official and generally carries expiration or reauthorization requirements, as well as ongoing obligations to update control status, manage plans of action and milestones (POA&Ms), and report changes. Treating the ATO as a one-time, permanent approval is a common mistake; the system's authorization status in eMASS must be maintained as conditions and the environment change. Verify specific timelines and continuous monitoring requirements against current applicable policy.
How does eMASS relate to the RMF steps and the artifacts an assessor expects to review?
eMASS is generally used to document the RMF workflow, including control selection and tailoring, implementation status, assessment findings, POA&Ms, and the authorization decision. It typically serves as the repository where control implementation statements, test results, and supporting artifacts are recorded for review. The specific fields, required artifacts, and workflow steps can vary by organization and eMASS instance configuration, so confirm your program's expectations and the applicable RMF guidance rather than assuming a uniform layout.
Who typically holds which roles in eMASS during an authorization effort?
eMASS supports role-based workflows that generally map to RMF roles such as the Information System Security Manager or Officer, the Security Control Assessor, and the Authorizing Official, among others. Permissions and the ability to enter, review, or approve content are typically tied to assigned roles. Because role assignments and access are configured by the sponsoring organization, confirm your specific responsibilities and access rights with your program's eMASS administrator rather than assuming default permissions.
How are POA&Ms managed within eMASS?
eMASS is generally used to record and track plans of action and milestones for controls that are not fully implemented or that have identified weaknesses, including associated milestones and status updates. Maintaining accurate, current POA&M entries supports continuous monitoring and the Authorizing Official's ongoing risk decisions. The precise required fields, scheduling conventions, and closure procedures can vary by organization, so follow your program's guidance and applicable policy for POA&M formatting and review cadence.
Does an authorization documented in eMASS for a DoD system satisfy other frameworks such as FedRAMP or civilian FISMA requirements?
Not necessarily. eMASS is used to manage RMF-based authorizations, commonly for DoD systems, but an authorization tracked there does not automatically satisfy the distinct requirements of other programs. FedRAMP authorization and civilian agency FISMA processes have their own authorities, baselines, and scope, and a DoD ATO does not inherently transfer. Where reciprocity or reuse of artifacts is contemplated, confirm the specific acceptance conditions with the relevant authorizing bodies rather than assuming cross-framework equivalence.

Common misconceptions

eMASS is a security control or a tool that makes a system compliant or secure.
eMASS is a workflow and documentation platform that supports the RMF process. Recording controls and packages in eMASS does not implement controls or make a system secure; compliance documentation is not the same as security.
An ATO recorded in eMASS is permanent once entered.
An ATO is generally time-bound and subject to continuous monitoring. eMASS reflects the current authorization status, but the authorization must be maintained and reassessed; the tool does not extend or perpetuate an ATO on its own.
eMASS performs the security assessment or issues the authorization decision.
eMASS records assessment results and authorization decisions, but assessment and authorization are distinct activities carried out by responsible personnel (such as assessors and authorizing officials). The application supports these activities rather than replacing the human decisions.

Best practices

Treat eMASS as a system of record for RMF artifacts and keep the SSP, control implementation statements, assessment results, and POA&M items current and consistent with the actual system state.
Manage POA&M items actively with realistic milestones and resource information, and update status as weaknesses are remediated rather than allowing entries to become stale.
Apply role-based access and workflow controls appropriately so that package routing and approvals align with your organization's defined RMF roles and separation-of-duties expectations.
Remember that authorization is time-bound; track ATO expiration and continuous monitoring obligations in coordination with the authorizing official rather than assuming a recorded ATO remains valid indefinitely.
Do not equate a complete eMASS package with a secure or fully compliant system; verify that documented control implementations reflect operational reality through assessment activities.
Confirm current DoD, RMF revision, and agency-specific guidance for eMASS use and package requirements against official sources, since tailoring, baselines, and processes can change across revisions.