Senior Linux & Network Engineer — On-Site Infrastructure Lead

Digital Cloak; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Digital Cloak is seeking a highly skilled Linux and Network Engineer to operate as a matrixed resource managing and securing the enterprise digital infrastructure. This role supports client delivery efforts and requires the ability to direct multiple workstreams in a fluid environment with minimal supervision, including occasional after-hours involvement.

You will own the internal environment, patching, virtualization with Proxmox, Docker-based workloads, Ceph storage, and automation tooling

Qualifications

• Expert-level Linux system administration with complete fluency in the terminal (Windows administration not required).
• Strong Bash scripting and Python skills able to design and build tools, not just run one-off scripts.
• Hands-on networking experience with pfSense, OPNsense, Cisco, and Aruba, including router/firewall, switch, and wireless AP configuration.
• Proxmox VE experience including VM configuration, software-defined networking, Ceph storage.
• Competent Docker user: building images, writing Compose stacks, and managing container networking, volumes, and runtime troubleshooting.
• Root-cause analysis in complex, multi-layer environments.
• Excellent oral and written communication skills, with the ability to explain the same issue to both technical and non-technical audiences.
• Adept leadership skills demonstrating the ability to guide others in shared tasks, recognizing strengths and creating space for input, and receiving constructive feedback.
• Self-starter who operates effectively with minimal direction and takes full ownership of outcomes.
• Cybersecurity and system hardening experience.
• Automation-first mindset: builds tooling to enhance and scale everyday work.

Responsibilities

• Own the full internal environment: Linux servers, enterprise applications, network infrastructure, and end-user computing.
• Perform patching, maintenance, and lifecycle management across systems and network devices.
• Maintain environment uptime and availability; respond to rare after-hours issues when systems are impacted.
• Configure and manage routers, firewalls, switches, and wireless across pfSense, OPNsense, Cisco, and Aruba platforms.
• Build, operate, and optimize the Proxmox virtualization environment, including VM provisioning, software-defined networking, and Ceph distributed storage.
• Deploy, maintain, and troubleshoot containerized services and workloads on Docker-based infrastructure.
• Diagnose complex, multi-layer issues end-to-end, tracing problems to true root cause rather than treating symptoms.
• Communicate findings and resolutions clearly to technical stakeholders, non-technical staff, and end users alike.
• Design and write automation tooling in Bash and Python to streamline provisioning, monitoring, maintenance, and daily operations.
• Identify and implement process and design improvements that scale the effectiveness of a one-person IT function.
• Unblock end users promptly and serve as the primary point of contact for internal IT needs.

Skills

Linux admin

Bash scripting

Python

Networking (pfSense/OPNsense/Cisco/Ar

Proxmox

Docker

Root-cause analysis

Communication

Leadership

Self-starter

Security hardening

Automation

Education

Bachelors degree or 305 years hands-on experience

Tools

Proxmox VE

Ceph

Docker

pfSense/OPNsense/Cisco/Aruba

Job description

Digital Cloak is seeking a highly skilled Linux and Network Engineer to operate as a matrixed resource managing and securing the enterprise digital infrastructure. This role supports client delivery efforts and requires the ability to direct multiple workstreams in a fluid environment with minimal supervision, including occasional after-hours involvement.

You will own the internal environment, patching, virtualization with Proxmox, Docker-based workloads, Ceph storage, and automation tooling