Job Description
Job Description
About Castelion
Castelion is bringing a new approach to defense development and production: one that focuses on short, iterative design cycles, rapid testing in development, and modern commercial manufacturing strategies for production at scale. We're designing, building, and testing next generation long range strike weapons systems to give America and its Allies a definitive edge and deter future conflicts.
Senior IT Network Engineer
We are seeking a highly skilled and security-cleared Senior Network Engineer to design, implement, manage, and maintain complex network infrastructures supporting our mission-critical systems. The ideal candidate will bring deep technical knowledge of networking protocols and architecture, an understanding of cybersecurity requirements (e.g., DISA STIGs, RMF), and proven experience operating in a fast paced, growing organization.
Responsibilities
- Design, deploy, and maintain secure and scalable enterprise network infrastructures, including LAN, WAN, VPN, VoIP, and wireless.
- Collaborate with cybersecurity, systems engineering, and project teams to ensure compliance with DoD and NIST cybersecurity compliance standards.
- Manage all components in a modern hybrid cloud network infrastructure, including workloads on-premises, in major cloud providers, and in the field.
- Configure and manage routers, switches, firewalls, and other network devices from vendors such as Cisco, Juniper, Palo Alto, and Fortinet.
- Implement and maintain system hardening in compliance with DoD STIGs, NIST frameworks, CMMC, and more.
- Lead troubleshooting and root cause analysis of complex network issues in a multitude of environments.
- Develop and maintain network documentation, diagrams, and standard operating procedures.
- Provide mentorship and guidance to junior network engineers and technicians.
- Participate in audits, accreditation, and certification processes.
- Support deployments and field operations, including as-needed travel (5-10%) to other Castelion sites.
Basic Qualifications
- Bachelors degree in Computer Science, Information Technology, or a related field (or equivalent experience).
- 7+ years of experience in network engineering roles, preferably in fast-paced companies, startup, defense, or government environments.
- Expert-level knowledge of networking protocols (TCP/IP, BGP, OSPF, EIGRP, MPLS).
- Hands-on experience with Cisco, Juniper, or similar network hardware.
- Experience applying controls as directed by cybersecurity frameworks (RMF, STIGs, NIST, CMMC).
- Strong documentation and communication skills.
- Strong experience with SD-WAN and software-defined networking (SDN).
Preferred Qualifications
- Industry certifications such as CompTIA Security+ or CISSP.
- Experience supporting classified networks.
- Experience with automation tools (Ansible, Terraform, Puppet, PowerShell DSC).
- Understanding of Zero Trust architecture and secure enclave designs.
- Active Security Clearance
Working Conditions
- On-site work; some after-hours/on-call support may be necessary.
- Occasional lifting of IT equipment (up to 40 lbs) and data center work.
Leadership Qualities
- Bias to Action and Creative Problem Solving. Desire and experience questioning assumptions in ways that lead to break through ideas that are ultimately implemented. Successfully bring in applicable processes/concepts/materials from other industries to achieve efficiency gains. Ability to personally resolve minor issues in development without requiring significant support.
- High Commitment, High Initiative. A successful candidate will have a genuine passion for Castelion's mission and consistently look for ways to contribute to the company's technical goals and prevent hardware blockers. Ability to work in a fast paced, autonomously driven, and demanding atmosphere. Strong sense of accountability and integrity.
- Clear Communicator. Proactively communicates blockers. Trusted in previous roles to be voice of company with regulators, suppliers, gate keepers and customers. Capable of tactfully managing relationships with stakeholders to achieve company-desired outcomes without compromising relationships. Emails, IMs and verbal interactions are logical, drive clarity, and detailed enough to eliminate ambiguity.
ITAR Requirements
- To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State.
Employment with Castelion is governed on the basis of 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.
All employees are granted long-term stock incentives as part of their employment at Castelion. All employees receive access to comprehensive medical, vision, and dental insurance, and the company offers four weeks of paid time off per year.