Is this a replacement for a formal audit?

No. Periodic reviews — freeze commit or rolling commit — are an expected part of the engagement, run by a full Sigma Prime review team that the integrated engineer joins.

Will the engineer write features for us?

No. The scope is security-related work. The integrated engineer works closely with your developers but does not take responsibility for software development or feature delivery.

Is it always the same engineer?

Engineers may be rotated periodically where appropriate, so the engagement is backed by the wider Sigma Prime team rather than depending on one individual. Handover is managed to preserve context.

How is this different from Secstant?

The Integrated Security Engineer is a service engagement with our team. Secstant is product tooling under development.

Integrated Security Engineer

The Integrated Security Engineer engagement embeds a Sigma Prime security engineer alongside your team and development processes. The engagement combines periodic reviews — freeze commit or rolling commit — with ongoing security-related work between reviews: early-stage security input, review of protocol upgrades and material codebase changes, security testing artifacts such as fuzzers and property tests, and validation of fixes. It keeps security judgment close to active development without making Sigma Prime responsible for software delivery.

Request a scoping call

What the engagement covers.

The scope of this engagement is security-related work. While the integrated engineer works closely with the development team, they are not a member of the client’s engineering team and do not take on software development or feature delivery.

01

Periodic reviews. Freeze commit or rolling commit reviews run during the engagement. For these, Sigma Prime stands up a standard review team — engagement director, account manager, lead reviewer, and supporting reviewers — with the integrated engineer joining, typically as a lead reviewer.
02

Early-stage security input during the development process, including design review, threat assumptions, and release-blocking risks as the system evolves.
03

Review of planned protocol upgrades, fork changes, and other material codebase changes.
04

Development, maintenance, and improvement of security testing artifacts: fuzzers, attack-vector harnesses, property tests, and other review tooling.
05

Follow-up review and validation of fixes for identified vulnerabilities, keeping the original threat model intact through remediation.

How the engagement operates.

Time between periodic reviews is spent on security-related work for the client, with direction predominantly coming from the client and reporting to both the client and Sigma Prime.

The integrated engineer remains a Sigma Prime employee throughout the engagement, backed by the wider Sigma Prime team. Engineers may be rotated periodically where appropriate, with handover managed so knowledge is shared and the engagement does not depend on a single individual.

This is separate from Secstant, our security tooling product under development. The Integrated Security Engineer is a service model led by engineers; tooling may support the work, but it does not replace engineering judgment.

How integrated security engineering works.

This is not a standing audit report

A fixed-scope audit gives a clear report for a clear code snapshot. The integrated model is different: it is useful when a team needs recurring security input while design, implementation, and release planning are still moving. The output is review notes, finding triage, security testing artifacts, and the periodic review reports themselves.

Security work, not feature delivery

The integrated engineer works closely with your developers but is not a member of your engineering team. They do not become responsible for software development or feature delivery — the engagement stays focused on security review, security tooling, and security decision-making.

Security leadership is practical, not ceremonial

For some teams, the gap is not another line-by-line review. It is the absence of a senior security counterpart who can make risk tradeoffs legible, challenge weak release assumptions, and help leadership decide what needs to block a launch. This can provide practical security leadership support without pretending to be a full internal security department.

Where this model fits

Protocols shipping frequent upgrades that need recurring security review between formal audits.
Teams that want security input early in the design process rather than at the end.
Codebases that benefit from maintained fuzzing, property testing, and attack-vector harnesses.
Leadership teams that need a credible external security counterpart while building internal process and ownership.

Related research and guidance.

Frequently asked questions.

Is this a replacement for a formal audit?

No. Periodic reviews — freeze commit or rolling commit — are an expected part of the engagement, run by a full Sigma Prime review team that the integrated engineer joins.
Will the engineer write features for us?

No. The scope is security-related work. The integrated engineer works closely with your developers but does not take responsibility for software development or feature delivery.
Is it always the same engineer?

Engineers may be rotated periodically where appropriate, so the engagement is backed by the wider Sigma Prime team rather than depending on one individual. Handover is managed to preserve context.
How is this different from Secstant?

The Integrated Security Engineer is a service engagement with our team. Secstant is product tooling under development.

Other engagements you might be considering.

Talk to us about an integrated security engineer.

If your team needs recurring security engineering support or a senior external security counterpart around active releases, tell us what you are building and where the decision pressure sits.

Request a scoping call

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