Prove your cybersecurity skills
Security skill shows in how you think about an attacker. Lemma records that thinking in live threat-modelling sessions and adaptive scenario questions, alongside security work you connect from GitHub.
What cybersecurity competence looks like
A capable security practitioner looks at a system and sees the paths an attacker would take. They map trust boundaries, spot where untrusted input meets something powerful, and rank risks by likelihood and impact rather than headline drama. Their fixes are proportionate, so teams actually adopt them.
They also work well with developers. They explain a vulnerability in terms of what could happen, suggest a concrete fix and help build guardrails that prevent the next one. During an incident they stay calm, preserve evidence and communicate clearly. They keep learning, because attack techniques do not stand still.
A live threat-modelling session
60 min · Learning · with Zara Q.
Zara Q. rated the session
Practitioner · after the call
Clear reasoning on threat modelling. Talked through trade-offs first.
Threat modelling
Mapping assets, trust boundaries and attack paths to decide which risks deserve attention first.
Web application security
Injection, broken access control, cross-site scripting and the rest of the OWASP Top 10 in real code.
Identity and access
Authentication flows, session handling, least privilege and the common ways each one fails.
Network security
Segmentation, firewalls, TLS and monitoring that limit how far an attacker can move.
Incident response
Detection, containment, evidence preservation and clear communication when something has gone wrong.
Secure development
Code review, dependency scanning and secrets management built into how teams ship software.
What counts as evidence of cybersecurity skills?
Certificates in cybersecurity show an exam was passed. Lemma records how you work: sessions where you talked through a design or an incident, an adaptive test, and configuration in repositories you link. Every entry says where it came from. See the evidence methodology for how each source is weighed.
Cybersecurity
Mei L. · SCI recomputed 9 Oct
Evidence · 4 entries
- Rated 5.0
A live threat-modelling session
Live session · 9 Oct
- Level 7.2
Scenario questions on real threats
Adaptive assessment · 2 Oct
- Verified
Security tooling or fixes on GitHub
GitHub connector · 24 Sep
- Taught · 1.5x
Teaching a secure coding topic
Live session · 11 Sep
A live threat-modelling session
In a session, a practitioner describes a system and you map how it could be attacked and what to fix first. The clarity of your risk ranking and fixes is what gets rated.
Scenario questions on real threats
The adaptive assessment uses realistic security situations, such as a suspicious login pattern or a leaked key, and asks for the best response. Difficulty follows your answers.
Security tooling or fixes on GitHub
Attach a repository or commit with security work you did: a vulnerability fix, a hardening script or a scanning setup. Lemma confirms access and re-checks it over time.
Teaching a secure coding topic
Teaching a session on access control or input validation counts more than learning one. Explaining a vulnerability so a developer can prevent it is a core security skill.
How is a cybersecurity skills test run on Lemma?
The cybersecurity test is adaptive, 15 to 25 questions on failure modes, permissions and cost rather than service names, and it stops once your level holds steady. With sessions and linked work it sets your cybersecurity SCI, where recent evidence carries more weight.
An API key was pushed to a public repository an hour ago. What do you do first?
- ARevoke and rotate the key
- BDelete the commit
- CMake the repository private
- DEmail the team
Model threats with a practitioner
Book a live session and threat-model a system together, from login flow to data storage. The practitioner rates how you identify attack paths and how sensible your prioritised fixes are.
Answer adaptive threat scenarios
The assessment presents realistic security situations with one best response. Difficulty moves with each answer, and per-question time limits mean you rely on judgement you already have.
Link the security work you shipped
Connect GitHub and attach repositories or commits with security fixes, hardening or tooling. It shows your skill reached real code, and the link stays checked over time.
Cybersecurity skills: common questions
How do I prove cybersecurity skills without industry experience?
What does a cybersecurity skills assessment test on Lemma?
Are security certifications or hands-on evidence more useful for hiring?
Can I share security evidence without exposing sensitive details?
Skills related to cybersecurity
Browse the skills directoryCloud architecture
Show how you design cloud systems that scale, fail gracefully and stay affordable.
Evidence for cloud architectureDevOps
Evidence of how you build pipelines, ship safely and keep systems observable.
Evidence for DevOpsAWS
Evidence that you can design, secure and run workloads on AWS, not just name services.
Evidence for AWSSystem design
Show how you reason about scale, failure and trade-offs, in live design sessions reviewed by practitioners.
Evidence for system design
Start your cybersecurity evidence record.
Lemma is in early access. Request an invite and we will email you when your place is ready.