Cyber Range Platform Engineer

Get to Know Us

Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and 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 ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, 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.

Summary/Overview

We are looking for a Platform Engineer to help lead the deployment and operation of our Cyber Range infrastructure. Your goal will be to help build, maintain and improve our infrastructure running in on-premise and cloud environments. Your expertise in cloud infrastructure, kubernetes, VMware vCenter, and tools like Terraform, Ansible, Packer and GitLab CI will be essential in creating scalable and resilient real-world like scenarios that enable innovative experimentation. Join us in shaping the future of our Cyber Range infrastructure, driving growth and empowering developers with a flexible and efficient environment.

Essential Functions

• Implement highly scalable, secure, resilient cloud-native and on-premise application platforms that host vulnerable applications, configurations, and other services vital to research and development of our product.

• Identify, design, and implement improvements in deployment processes so engineers can begin development anytime with confidence.

• Design and implement tooling for the internal platform to collect telemetry data used to gauge its effectiveness in supporting H3's engineers.

• Help create an effective documentation culture within the Engineering Organization (Confluence, Documentation as code).

• Participate in effective project management and work allocation (Jira, Agile Concepts).

• Create Terraform modules and Ansible playbooks that are extensible across the infrastructure to reliably and effectively deploy vulnerable testing scenarios for engineering development efforts.

• Be a positive example of automation for infrastructure-as-code, platform operations, and overall CI/CD methodologies.

• Evaluate new technologies and patterns for automation, application hosting, and improving infrastructure provisioning. Recommend and define the work needed.

Competencies

• 5+ years of experience in DevOps, Platform engineering, or related roles.

• 2+ years of experience in Systems and Network administration.

• Ability to manage concurrent initiatives and use effective judgment in prioritization and time management.

• Creative, self-motivated, pragmatic, disciplined, detail and results oriented.

• Excellent analytical/problem solving ability.

• Strong understanding and experience with solution design and flow

• Strong technical documentation and communication

Tools (5+ years with each is ideal):

• Gitlab CI/CD

• SSO (OIDC, SAML, Okta, Social Sign-ins)

• Infrastructure as Code (Terraform, CloudFormations)

• Secret Management (HashiCorp Vault, AWS Secret Manager, External Secrets Operator)

• Configuration Management (Ansible)

• Shell Scripting
Image Building (Packer, QEMU)

• Programming Languages (Python, Powershell)

• Container Engines (Docker)

• Kubernetes (RKE2, K3S, EKS)

• Logging and Metrics (Datadog, OpenSearch)

On-Premise Technologies:

VMware vCenter Server/vSAN

Dell Network Switches

Fortinet Network Security Devices

Cloud Technologies:

AWS/Azure Core Services

• Compute (EC2, Lambda, EKS, Virtual Machines)

• Storage (S3, EBS, Image Gallery, Storage Accounts)

• Database (AuroraRDS - Postgres)

• Networking (VPC, VPCe, RT53, Resource Groups, vnets)

• Event-Driven Architecture (SQS, EventBus)

• Security (IAM Roles and Policies, KMS, Cloudtrail)

• User Management (Cognito, Organizations, SSO, Subscriptions, Tenants)

• Hybrid Domains (MSEntra/AzureAD)

Education:

• Bachelors in Computer Science or STEM or equivalent experience

• MS in Computer Science a plus

Nice to Haves

• Experience in Offensive or Defensive cyber security roles and/or certifications.

Other duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

Why H3

• Competitive Compensation: We offer a highly competitive salary and benefits package.

• Growth Opportunities: Be part of a dynamic and growing team with numerous career advancement opportunities.

• Innovation-Driven Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.

• Flexible Work Environment: Enjoy the convenience and work-life balance that comes with remote work.

• Inclusive and Diverse Team: We value diversity and promote an inclusive culture where everyone can thrive.

Travel Required

We are a fully remote company, and this job may require up to 5% of travel to be successful. Job-related travel expenses are reviewed and must be approved by your manager

Compensation and Values

At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.

In accordance with various State’s transparency regulations, we provide the following salary range information for this position:

• Base salary range: $180,000 - $220,000 annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

• Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.

You Belong Here

Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, or any other legally protected status by law.

Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.

We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.