Manager, Security Engineering, Cloud & AppSec

Horizon3 AI

2d•$149,850 - $185,000•Remote

About The Position

Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results. This role will lead the engineers responsible for securing our Cloud environments and embedding security into the software development lifecycle. The ideal candidate brings strong technical depth in cloud security, practical application security experience, and the ability to partner effectively across engineering, infrastructure, and compliance. By strengthening both our cloud and application security posture, this role will directly support the security, resilience, and scalability of our platform and internal systems.

Requirements

Must be proficient in AWS security services, Terraform, GitLab, and modern CI/CD security practices
Must have a deep understanding of AWS security architecture, IAM, cloud posture management, data security principles, and secure SDLC practices
Must have experience leading or closely partnering with Application Security efforts, including threat modeling, vulnerability management, and security reviews
Must be knowledgeable in compliance standards and security frameworks, including SOC 2, GDPR, ISO 27001, FedRAMP, NIST, CIS, and MITRE ATT&CK
Must have strong written and verbal communication skills, with the ability to explain technical risks and tradeoffs to both technical and non-technical stakeholders
Must be able to work independently and as part of a team, with a strong sense of ownership and accountability
Must have experience developing metrics and reporting that communicate risk and security posture to leadership
Must have familiarity with DLP concepts, including data classification, identification, and protection
Bachelor’s degree in Computer Science, Cybersecurity, Information Systems, or a related field, or equivalent practical experience
5+ years of experience in cybersecurity
5+ years of experience securing AWS environments
5+ years of experience securing cloud-native systems and modern software delivery pipelines
Prior experience leading security engineers or serving as a technical lead in a security engineering function
AWS
Terraform
Crossplane
ArgoCD
GitLab
CI/CD security tooling
Cloud security monitoring and posture tools
IAM and access control systems

Nice To Haves

Experience leading both Cloud Security and Application Security teams
AWS Certified Security – Specialty
CISSP or other relevant security certifications
Experience in high-growth SaaS or cybersecurity companies
Experience building security programs that scale across engineering organizations
Broad knowledge across the security domain, with deeper specialization in one or more areas such as incident management, detection engineering, response tooling, or logs/events processing

Responsibilities

Lead, coach, and grow the Security Engineering team, including both Cloud Security Engineers and Application Security Engineers
Set priorities and operating rhythms for the team, balancing strategic security investments, day-to-day engineering support, and incident response
Design and implement security controls across our Cloud environments, such as but not limited to: AWS, Azure, GCP, Digital Ocean, OCI, etc.., including IAM, SCPs, VPC security, S3 bucket policies, security groups, key management, and logging
Continuously monitor and improve cloud posture by managing and tuning services such as GuardDuty, Security Hub, AWS WAF, CloudTrail, and Inspector
Partner with engineering teams to embed security into the SDLC, including secure design reviews, threat modeling, architecture review, and CI/CD security automation
Lead the application security program, including secure coding practices, vulnerability management, developer enablement, and product security reviews
Continuously monitor and improve application security tooling by managing and tuning services such as SonarQube, Dependency Track, ZAproxy, Trufflehog, Trivy,
Build and maintain GitLab CI/CD pipelines and tooling for automated security testing and scanning of cloud resources and applications
Conduct threat modeling, architecture reviews, and risk assessments for cloud deployments, product features, and new systems
Implement security monitoring, secure systems hardening, and detective controls for malicious activity across AWS and application environments
Respond quickly to new and emerging threats and vulnerabilities; support investigations, post-mortem analysis, root cause identification, and preventive actions
Define and enforce identity and access management best practices, including least privilege, federated identity, role-based access control, and automated remediation
Develop and maintain security policies, standards, and procedures aligned to frameworks such as SOC 2, GDPR, ISO 27001, FedRAMP, NIST, CIS, and MITRE ATT&CK
Create metrics, reporting, and risk narratives that communicate security posture, trends, and priorities to business owners and leadership
Evaluate and recommend new tools, techniques, and controls to improve the security posture of our cloud and application environments
Demonstrate a commitment to integrity, process improvement, and customer satisfaction
Recruiting and onboarding talented individuals to support our organizational goals
Mentoring, coaching, equipping, and developing your team
Recognizing and retaining high performers
Leading horizontally with peer management and senior leaders