Castelion · 5 hours ago
Senior IT Cloud and Systems Engineer
Torrance, CA
Full-time
Onsite
Senior Level
7+ years expCastelion is bringing a new approach to defense development and production, focusing on short, iterative design cycles and modern manufacturing strategies. They are seeking a highly skilled Senior IT Cloud and Systems Engineer to lead the design, implementation, and maintenance of critical IT infrastructure while ensuring compliance with DoD and industry standards.
AerospaceGovernmentManufacturingMilitaryNational Security
No H1B
U.S. Citizen Only
Responsibilities
Own our cloud IaaS and virtualization platforms including Microsoft Azure, AWS, and on-premises platforms
Responsible for enabling our internal IaaS customers, like DevSecOps and software engineering. Ensure their creations are secure, compliant, scalable and stable
Lead and architect IT infrastructure projects including system deployments, upgrades, and migrations
Implement and maintain system hardening in compliance with DoD STIGs, NIST frameworks, CMMC, and more
Administer, maintain, and secure Linux and Windows based server environments
Monitor system performance, conduct root cause analysis, and resolve complex infrastructure issues
Ensure system availability and disaster recovery through backups, patch management, and redundancy planning
Manage Microsoft 365 environment
Collaborate with cybersecurity teams during audits, incident response, and vulnerability remediation
Document system configurations, procedures, and changes to maintain accurate and secure records
Train and mentor junior IT staff, promoting a culture of compliance and technical excellence
Qualification
Required
7+ years of experience in cloud, systems, and/or network administration in a secure, enterprise IT environment
Strong experience designing and managing public cloud and on-premise private cloud
Strong understanding of networking fundamentals, and ability to work alongside Network Engineering on implementation of multi-cloud connectivity
Strong experience managing Linux and Windows servers and endpoints
Experience managing Kubernetes
Strong in automation and scripting - ideally tools like PowerShell, Python, Bash, Azure Automation, Logic Apps, etc
In-depth knowledge of virtualization and enterprise storage options
Familiarity with cybersecurity compliance frameworks
Strong understanding of monitoring strategies for availability, performance and security
Strong problem-solving, documentation, and communication skills
Preferred
Industry certifications such as CompTIA Security+ or CISSP
Active security clearance
Understanding of Zero Trust architecture and secure enclave designs
Benefits
Long-term stock incentives
Comprehensive medical, vision, and dental insurance
Four weeks of paid time off per year
Company
Castelion
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$469.61MKey Investors
Altimeter Capital,Lightspeed Venture PartnersLightspeed Venture PartnersSilicon Valley Bank
2025-12-05Series B· $350M
2025-01-29Series A· $70M
2025-01-29Debt Financing· $30M
Leadership Team
Bryon Hargis
Founder // CEO
Andrew Kreitz
Co-Founder and CFO
Recent News
alleywatch.com
2026-01-23
Company data provided by crunchbase