Network Engineer
Astro Digital
IT
San Jose, CA, USA
Posted on Oct 10, 2025
Network Engineer and Administrator (AWS + On-Prem Hybrid Infrastructure)
Employment Type: Full-Time
About the Role
We are seeking a skilled Network Administrator with hands-on experience managing hybrid cloud and on-prem network environments. The ideal candidate will have practical experience with AWS infrastructure (EC2, VPC, VPN, Route53, Veeam Backup) and Cisco Firepower (FTD 1010) firewalls, as well as managing site-to-site VPNs, network security, and remote access systems.
This role involves maintaining and improving our secure network connectivity between physical sites and AWS-hosted infrastructure, ensuring uptime, security, and smooth operation across mission-critical systems that support our satellite operations and internal teams.
Key Responsibilities
- Administer and maintain AWS environments, including EC2, VPC, Route53, and AWS VPN configurations.
- Manage AWS Veeam backup systems for EC2 instances and VM snapshots (weekly and on-demand backups).
- Configure and maintain Cisco FTD 1010 firewalls, including site-to-site VPNs to connect remote offices and AWS VPC instances.
- Monitor and troubleshoot VPN connectivity for users and infrastructure.
- Manage and maintain on-prem network infrastructure, including switches, routers, and Wi-Fi management (e.g., UniFi UDM SE).
- Support ESXi servers and virtualized environments hosting GitLab runners, internal VMs, and development resources.
- Maintain and update OpenVPN server configurations, renew certificates, and manage user access via scripts and automation tools.
- Assist with DNS management via Route53 for hosted zones.
- Ensure network security policies and backups are consistently applied across all environments.
- Troubleshoot system connectivity, network routing, and performance issues between sites and cloud resources.
- Collaborate with IT, DevOps, and Engineering teams to support operations and future scaling of infrastructure.
Required Skills & Experience
- B.S. in Information Technology, Computer Engineering, or related field, or equivalent experience.
- 3+ years of hands-on experience as a Network Administrator or Systems Administrator.
- Proficiency with AWS infrastructure: EC2, VPC, VPN, Route53, and IAM management.
- Experience configuring and maintaining Cisco Firepower Threat Defense (FTD 1010) or similar firewalls.
- Strong understanding of site-to-site VPNs, routing, NAT, and tunneling protocols.
- Experience with Veeam Backup for AWS or equivalent backup solutions.
- Familiarity with VMware ESXi environments and VM lifecycle management.
- Knowledge of Linux systems administration (Ubuntu preferred) and SSH key management.
- Hands-on experience managing OpenVPN servers and scripting basic user operations.
- Understanding of DNS administration and domain hosting (Route53).
- Strong documentation skills and ability to maintain operational continuity for multi-site networks.
Bonus / Nice-to-Have
- Experience with GovCloud, GitLab infrastructure, or similar DevOps platforms.
- Familiarity with UniFi network management and Raspberry Pi remote nodes.
- Basic understanding of security systems (e.g., ADT, keyfob access) for site management.
- AWS Certification (Solutions Architect, SysOps, or Network Specialty).
- Cisco Certification (CCNA or higher).
Why Join Us?
- Work at the intersection of cloud and on-prem infrastructure supporting real satellite operations.
- Own critical networking systems spanning multiple physical sites and AWS environments.
- Collaborate with a small, talented engineering team where your work directly impacts mission reliability.
- Opportunity to grow into CloudOps or Infrastructure Engineering roles as the company expands.
