If you are working toward DoD 8140 compliance in an information security management role, you have almost certainly run into the same question: CISSP or CISM? Both certifications appear on the DoD 8140 approved list for IAM Level II and IAM Level III roles. Both are globally recognized and respected. But they are built around different areas of expertise, and the right choice depends heavily on where you are in your career and what your current role actually requires.
What Each Certification Covers
CISSP (Certified Information Systems Security Professional, issued by ISC2) covers eight domains of information security knowledge: Security and Risk Management, Asset Security, Security Architecture and Engineering, Communication and Network Security, Identity and Access Management, Security Assessment and Testing, Security Operations, and Software Development Security. It is a broad certification designed to validate deep technical and managerial knowledge across the entire security discipline.
CISM (Certified Information Security Manager, issued by ISACA) focuses on four domains: Information Security Governance, Information Risk Management, Information Security Program Development and Management, and Information Security Incident Management. As the name implies, it is built for managers and leaders who govern security programs, not generalists.
The practical difference: CISSP tests whether you know security deeply across a wide range. CISM tests whether you can govern, build, and manage a security program.
Which DoD Roles Each Satisfies
Under the DoD 8140 framework and its predecessor DoD 8570, both CISSP and CISM qualify for the same IAM tiers:
IAM Level I: Neither CISSP nor CISM is typically required at this level. CompTIA Security+ satisfies most IAM Level I requirements.
IAM Level II: Both CISSP and CISM are approved qualifiers. Also approved at this level: CASP+, GSLC, CCISO, and CAP.
IAM Level III: Both CISSP and CISM qualify at the senior level. GSLC and CCISO are also approved alternatives.
IASAE roles: CISSP appears in IASAE Level I and II requirements. CISM does not have the same presence in IASAE roles, which are more technically oriented toward security architecture and engineering.
If your role is on the IASAE track, CISSP is the clear choice. For management and governance roles at IAM Level II or III, either credential satisfies the baseline requirement.
Who Should Get CISSP
The CISSP is the right choice if:
You are in or moving toward a technical security leadership role, security architect, systems security engineer, ISSM, or senior analyst. You want the broadest possible credential that proves depth across all security domains. Your role touches IASAE requirements, where CISM does not appear. You are earlier in your management career and want a credential that also demonstrates hands-on technical depth.
The five-year experience requirement (or four years with a qualifying degree) applies to CISSP. Candidates who do not yet meet the experience requirement can earn the Associate of ISC2 designation by passing the exam and fulfill their experience requirement afterward.
Who Should Get CISM
The CISM is the right choice if:
You are in a governance or program leadership role, ISSM, security director, CISO-track, or information security officer. Your job is less about technical implementation and more about policy, risk management, and program oversight. You want a credential that signals management focus rather than broad technical coverage. You have already earned your CISSP and want a complementary credential with a narrower governance lens.
CISM requires five years of information security management experience, with some substitutions allowed. The exam is shorter than CISSP and its domains are more tightly focused on program management and governance.
Can You Do Both?
Yes, and for senior DoD security professionals, holding both is increasingly common. CISSP plus CISM covers the widest range of Oversee and Govern work roles under the DoD Cyber Workforce Framework. Some senior ISSMs and security managers pursue CISSP first for the breadth, then add CISM to signal their management expertise. Others take CISM first because the governance focus aligns more directly with their current role, then add CISSP when they move into a more technical leadership position.
Both credentials require ongoing continuing education, so factor that maintenance commitment into your decision when planning your certification sequence.
How IT Dojo Can Help
IT Dojo offers instructor-led preparation courses for both CISSP and CISM. Our courses are taught by instructors with direct DoD and federal experience, available live online and on-site for commands and organizations throughout Hampton Roads and the National Capital Region.
If you are unsure which direction to go, contact IT Dojo and we can help you map your current role and career goals to the right certification path.