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Cyber Risk Council
Category: Third-Party & Supply Chain Risk

Standardized Information Gathering (SIG) Questionnaire

Also known as: SIG, Standard Information Gathering Questionnaire, SIG Questionnaire
Simply put

The Standardized Information Gathering (SIG) Questionnaire is a standardized set of questions used to collect security and risk information from vendors and other third parties. Organizations use it to assess how well a vendor protects data and manages security before or during a business relationship. It provides a common format so companies do not have to build vendor security questions from scratch each time.

Formal definition

The SIG Questionnaire is a standardized vendor risk assessment instrument used to perform security risk assessments of third parties. It is maintained and distributed through the Shared Assessments program, where a questionnaire is generated from a stored template and can be scoped and customized to the assessment's needs. The questionnaire maps to the requirements of numerous cybersecurity regulations and frameworks, enabling organizations to evaluate a vendor's security controls in a consistent, comparable manner. In practice, tooling such as a SIG Manager is used to create the Excel-based questionnaire from a standard scoping template, and variants exist to support broader or more focused assessments. Note that the SIG supports the information-gathering and control-evaluation stage of third-party due diligence; interpreting responses, validating evidence, and making risk decisions remain the responsibility of the assessing organization.

Why it matters

As organizations increasingly depend on third parties for critical services, the security posture of those vendors becomes an extension of the organization's own risk exposure. The SIG Questionnaire addresses a practical problem in third-party risk management: without a standardized instrument, each organization would have to design vendor security questions from scratch, and each vendor would face a different questionnaire from every customer. By providing a common, mapped format, the SIG reduces duplicated effort on both sides and enables assessing organizations to evaluate vendor security controls in a more consistent and comparable manner.

The SIG is valuable precisely because it maps to the requirements of numerous cybersecurity regulations and frameworks, allowing a single questionnaire to inform multiple compliance and due diligence needs. This makes it useful during vendor onboarding, periodic reassessment, and contract renewal. However, it is important to be clear about what the SIG does and does not accomplish. It supports the information-gathering and control-evaluation stage of due diligence; it does not, on its own, validate that a vendor's stated controls are actually in place or effective. The value of a SIG-based assessment depends heavily on the assessing organization's willingness to interpret responses critically, request supporting evidence, and follow up on gaps.

A common mistake is to treat a completed SIG as proof of vendor security or as a substitute for a risk decision. It is neither. Interpreting responses, validating evidence, and deciding whether a vendor's risk is acceptable remain the responsibility of the assessing organization. Used well, the SIG is a structured starting point for a risk conversation; used poorly, it becomes a checkbox exercise that produces a false sense of assurance.

Who it's relevant to

Virtual and Fractional CISOs
A virtual or fractional CISO often advises client organizations on how to structure and run their third-party risk program, and the SIG is a widely recognized instrument for that purpose. In this capacity the vCISO typically provides governance and guidance: helping scope the questionnaire, defining criteria for evaluating responses, and advising on risk decisions. Note that a vCISO generally advises and directs rather than executing operational assessment tasks unless that work is explicitly contracted, and accountability for the resulting vendor risk decisions usually remains with the client organization.
Third-Party Risk and Vendor Management Teams
These teams are the most direct users of the SIG. They scope and distribute the questionnaire, collect vendor responses, and evaluate reported controls as part of onboarding and periodic reassessment. The SIG helps standardize their workflow, but its effectiveness depends on the team's discipline in requesting supporting evidence and following up on gaps rather than accepting responses at face value.
Vendors and Service Providers Being Assessed
Organizations that supply services to others are frequently asked to complete the SIG for their customers. Because it is a standardized instrument, a vendor may be able to reuse much of its response across multiple customer requests, reducing repeated effort. Vendors should treat the questionnaire as a good-faith representation of their controls, since assessing organizations may request evidence to validate the responses.
Compliance and Governance Leaders
Because the SIG maps to the requirements of numerous regulations and frameworks, compliance and governance leaders can use it to support due diligence obligations across multiple regulatory contexts. It is important, however, to understand that completing a SIG supports assessment and readiness activities and does not by itself assert a vendor's certification or guarantee compliance with any given framework.

Inside SIG

Standardized Question Set
A library of pre-built questions covering security, privacy, and risk management domains, designed to be reusable across multiple vendor assessments rather than re-created for each engagement.
Domain Coverage
Questions organized across control areas such as information security policies, access control, network security, incident response, business continuity, third-party management, and privacy, typically mapped to common frameworks.
Framework Alignment
Cross-references to widely used standards and regulations such as NIST CSF, ISO 27001, SOC 2, HIPAA, PCI DSS, and GDPR, intended to help organizations relate responses to controls they may already recognize. Alignment supports mapping and does not by itself constitute compliance or certification.
Tiered or Scoped Versions
Different levels of depth, often distinguishing a shorter higher-level assessment from a more detailed one, allowing the assessing organization to match the questionnaire's rigor to the sensitivity of the relationship or data involved.
Response Format
A structured format, frequently spreadsheet-based, in which the assessed vendor supplies answers and supporting context, enabling more consistent comparison across vendors than free-form responses.
Supporting Evidence References
Fields or expectations for the vendor to reference documentation, attestations, or audit reports that substantiate their answers, since self-reported responses alone may vary in reliability.

Common questions

Answers to the questions practitioners most commonly ask about SIG.

Does completing a SIG Questionnaire mean my organization is certified or compliant?
No. The SIG Questionnaire is a standardized assessment tool used to gather information about a vendor's security, privacy, and control practices; it is not a certification and does not confer compliance status. Responding to a SIG reflects an organization's self-reported controls and, where applicable, supporting evidence, but it does not substitute for a formal audit, attestation, or certification such as SOC 2 or ISO 27001. Buyers typically use SIG responses as one input into a broader third-party risk assessment rather than as proof of compliance.
Is the SIG Questionnaire the same thing as a security audit or a penetration test?
No. The SIG is a questionnaire-based assessment used to collect information about controls and practices, not an independent examination of your environment. A security audit involves an assessor evaluating and often verifying controls against defined criteria, while a penetration test is a technical exercise to identify exploitable weaknesses. Treating a completed SIG as equivalent to audited or tested assurance is a common mistake; the SIG conveys what an organization reports about its controls, and the depth of validation depends on whether supporting evidence is requested and reviewed.
How can a virtual CISO help my organization respond to SIG Questionnaires?
A virtual CISO can typically provide governance and strategic support around SIG responses, such as helping interpret questions, mapping them to existing controls and documentation, coordinating input from internal stakeholders, and reviewing responses for accuracy and consistency before submission. The scope may vary by provider and engagement. Note that a vCISO generally advises and directs rather than performing every operational task, so responsibilities such as gathering evidence or maintaining underlying controls often remain with client teams, and accountability for the accuracy of responses stays with the client organization.
Should we use the full SIG or the SIG Lite version?
The choice often depends on the depth of assessment required and the risk associated with the relationship. A more comprehensive version is generally used for higher-risk or more complex vendor relationships where broader coverage is warranted, while a lighter version may be appropriate for lower-risk assessments or initial screening. In many engagements this decision is driven by the requesting party's third-party risk program, the sensitivity of data involved, and the level of assurance needed. A vCISO can help evaluate which version aligns with your risk profile and reporting obligations.
How do we keep SIG responses consistent with our other compliance documentation?
Consistency typically depends on mapping questionnaire items to your existing control framework and source documentation, such as policies, procedures, and any attestations you maintain. Maintaining a central reference of validated responses that ties back to authoritative sources can reduce contradictions across questionnaires. The effectiveness of this approach often depends on organizational maturity, stakeholder cooperation, and disciplined document management. A vCISO can advise on establishing this mapping, though ongoing maintenance and evidence ownership generally remain with internal teams.
Who inside our organization should be involved in completing a SIG Questionnaire?
Completing a SIG often requires input from multiple functions because the questions span security, privacy, governance, and operational domains. In many engagements this includes stakeholders responsible for information security, IT operations, privacy or legal, human resources, and business owners who understand the relevant processes. A virtual CISO can help coordinate these contributors and provide executive-level oversight, but the value of the process depends on access to the right stakeholders and their timely cooperation. Accountability for the accuracy and approval of the final response typically rests with the client organization and its officers.

Common misconceptions

Completing a SIG questionnaire proves a vendor is compliant or certified against a framework.
The questionnaire typically supports readiness and due diligence by gathering information and mapping to frameworks, but it does not itself certify compliance or guarantee that controls are effectively implemented. Responses are often self-reported and may require independent verification.
A virtual CISO who helps with SIG questionnaires is performing hands-on operational security work.
A vCISO generally advises on governance, risk, and third-party assessment strategy, and may help design, review, or interpret questionnaire responses. This is executive-level guidance rather than operational tasks such as running scans or administering tools, and it is typically out of scope unless explicitly contracted.
One standardized questionnaire fits every vendor relationship equally.
The value depends on selecting an appropriate scope or tier for the risk involved, and on the assessed vendor's cooperation and accuracy. A single fixed set may over- or under-assess depending on the vendor's maturity and the sensitivity of the data at stake.

Best practices

Match the questionnaire tier or scope to the risk level of the vendor relationship rather than applying one uniform depth to all vendors.
Request supporting evidence such as audit reports or attestations to corroborate self-reported answers, since responses alone may vary in reliability.
Use the questionnaire's framework mappings to relate responses to standards your organization already governs against, while avoiding treating a completed questionnaire as proof of compliance or certification.
Clarify in the engagement scope whether a virtual CISO's role is to advise on and interpret the assessment versus perform ongoing vendor monitoring, and confirm that accountability for accepting vendor risk remains with the client organization.
Establish a repeatable review cadence so questionnaire responses are reassessed as vendor relationships, data sensitivity, or the vendor's controls change over time.
Ensure stakeholder cooperation and access, as the assessment's value depends on the assessed vendor providing accurate, complete, and timely responses.