Cybersecurity Engineer II

Firefly Aerospace, Inc.; Cedar Park (TX); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Unlimited PTO

3-month sabbatical for every 5 years

Medical, dental, vision, life, anddis

Mental health services

Paid military leave

12 weeks paid maternity leave

4 weeks paid spouse leave

$20k towards family planning

Dog friendly workplace

$10k/year towards trade school orcol

Ongoing coaching to advance leadership

Employee-ownership with stock bonuses

4% Safe Harbor 401(k) matching

$10k home purchase bonus in Cedar Park

Job summary

Firefly Aerospace, Inc. is seeking a Cybersecurity Engineer II to architect and implement robust security across Linux and macOS endpoints, servers, and cloud infrastructure.

You will own the Unix-based security posture, configure hardening baselines, and drive vulnerability management while collaborating with cross-functional teams to safeguard data and systems. You will lead security monitoring, incident response, and compliance efforts, including ISO 27001, SOC 2, PCI-DSS, and NIST

Qualifications

• Bachelor's degree in Computer Science, Information Security, or a related field.
• 2+ years of information security engineering experience.
• Certifications such as CISSP, CKSS, or similar; familiarity with NIST, ISO 27001, SOC 2, and PCI-DSS.

Responsibilities

• Design, implement, and maintain security measures across Linux and macOS environments.
• Secure Kubernetes clusters and containerized apps; manage images and registries.
• Monitor security tools, respond to incidents, and develop incident response plans.
• Maintain security documentation and assist with audits and compliance.

Skills

Linux security

macOS security

Incident response

Kubernetes security

Container security

Security monitoring

Cloud security

DevSecOps

Networking security

CI/CD security

Education

Bachelor's degree in Computer Science, Information Security, or a related field

Tools

Docker

Kubernetes

Ansible

Terraform

Chef

SIEM

Job description

At Firefly, we’re focused on making space attainable for everyone – including you! Each team member’s passion, dedication, and innovative ideas have a direct impact on fueling our successful trajectory into space. And there’s no shortage of meaningful projects to work on at Firefly. With launch, lunar, and orbital vehicles, Firefly has a diverse line of business with opportunities to get hands‑on experience launching rockets, operating in space, and landing on the Moon.

Our missions are powered by our incredible team …

Headquartered in the Lone Star State, Firefly’s hardworking team reflects Texas’ GO BIG culture in everything we do. We build big, achieve big, and dream big. We’re building launch vehicles and spacecraft to provide rapid, reliable space access. We’ve achieved some incredible wins, including the first successful commercial Moon landing. And we’re dreaming bigger than this planet with ambitions to Mars, Venus, and beyond. Our core values are what drive us along the way.

Passion

Fireflies believe in perseverance, responsiveness, and mentoring others with a focus on inspiring a better future.

Accountability

Fireflies act with integrity and take ownership of our actions, commitments, decisions, and outcomes.

Fireflies work in alignment across teams and communicate clearly with mutual respect for one another.

Fireflies deliver high-quality work through technical rigor and timely disciplined execution for our customers.

We take care of our Fireflies with some of the best benefits in the industry. Our mission to make space for everyone starts with our employees and allowing them to make space for their family, their career, and their future.

Space for You

• Unlimited PTO for exempt employees
• 3-month sabbatical for every 5 years of service
• Medical, dental, vision, life, and disability insurance
• Mental health services
• Paid military leave

Space for Your Family

• 12 weeks paid maternity leave
• 4 weeks paid spouse leave
• $20k towards family planning: fertility, surrogacy, adoption
• Dog friendly workplace

Space for Your Career

• $10k/year towards trade school or college
• Ongoing coaching to advance leadership skills

Space for Your Future

• Employee-ownership with stock bonuses
• 4% Safe Harbor 401(k) matching
• $10k bonus for home purchase in Cedar Park, Texas

Job Openings

From launch technicians to propulsion engineers, Firefly has open roles across the company. We’re looking for passionate, bright innovators to join our team and help make space an achievable dream for everyone.

Firefly Aerospace is a space and defense technology company that enables our world to launch, land, and operate in space – anywhere, anytime. As the partner of choice for critical space missions, Firefly is the only commercial company to launch a satellite to orbit with 24-hour notice and the only company to achieve a successful Moon landing. Our launch vehicles, lunar landers, and orbital vehicles provide government and commercial customers with full mission services from low Earth orbit to the Moon and beyond. Headquartered in north Austin, Texas, Firefly is looking for passionate, hardworking innovators to join our team and help fuel our successful trajectory into space.

SUMMARY

As a Cybersecurity Engineer II at Firefly, your primary responsibility is designing, implementing, and maintaining robust security measures across our Linux and macOS environments. You will own the security posture of our Unix-based endpoint and server fleet — hardening configurations, managing vulnerabilities, and responding to threats — while also extending secure practices into our cloud infrastructure and containerized environments. You will collaborate closely with cross-functional teams to safeguard our data and systems against cyber threats, ensuring compliance with industry standards and regulations.

RESPONSIBILITIES

• Linux & macOS Security (Primary Duty):
  • o Develop, implement, and maintain security policies and procedures for Linux and macOS systems, ensuring alignment with compliance standards such as ISO 27001, SOC 2, PCI-DSS, and NIST.
  • o Conduct regular security assessments and vulnerability scans across Linux and macOS endpoints and servers, implementing patches and hardened configurations to mitigate risk.
  • o Monitor security tooling and Linux/macOS system logs for suspicious activity; analyze security incidents and respond promptly to contain and remediate threats.
  • o Manage endpoint protection, device compliance, and configuration baselines across the Linux and macOS fleet.
• Kubernetes and Containerization Security:
  • o Secure Kubernetes clusters using best practices, including RBAC, network policies, and pod security standards.
  • o Manage and secure containerized applications (Docker, Kubernetes), ensuring integrity of container images and registries.
  • o Monitor and remediate vulnerabilities within container environments.
• Security Monitoring and Incident Response:
  • o Monitor security tools and systems for alerts and events; investigate and respond to incidents.
  • o Develop and maintain incident response plans and playbooks, with regular drills.
  • o Coordinate with internal and external stakeholders during incident response.
• Documentation and Compliance:
  • o Maintain comprehensive documentation of security policies, procedures, and configurations, with emphasis on Linux/macOS environments.
  • o Support security audits and assessments with necessary documentation and evidence.
  • o Stay current on emerging threats, technologies, and regulatory requirements, adapting strategies accordingly.

QUALIFICATIONS

Required

• Bachelor's degree in Computer Science, Information Security, or a related field.
• 2+ years of experience in information security engineering, with a strong, demonstrated focus on Linux and macOS security.
• Proficiency in Linux/Unix/macOS operating systems, including security configurations, hardening, and best practices.
• Working knowledge of Kubernetes and container orchestration platforms, including security best practices.
• Excellent problem-solving skills, attention to detail, and the ability to work both independently and collaboratively.
• Certifications such as CISSP, AWS Certified Security – Specialty, Certified Kubernetes Security Specialist (CKS), or similar.
• Experience with compliance frameworks such as NIST, ISO 27001, SOC 2, and PCI-DSS.
• Experience with cloud platforms (e.g., AWS, Azure), including security services and configurations.
• Familiarity with configuration management tools (e.g., Ansible, Terraform, Chef) and infrastructure as code (IaC) practices.
• Experience with containerization technologies (e.g., Docker, Kubernetes) and their security considerations.
• Experience with Security Information and Event Management (SIEM) monitoring tools and incident response processes.
• Strong understanding of networking concepts, protocols, and security measures.
• Knowledge of DevSecOps practices and integrating security into CI/CD pipelines.

Firefly offers outstanding benefits for our employees, including generous health, dental and vision plans with low plan deductibles, parental leave, relocation benefits, educational reimbursement, short term disability, and flexible PTO options.

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State.

Firefly Aerospace, Inc. is an Equal Opportunity Employer; employment with Firefly is governed based on merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.