Senior Infrastructure & Security Engineer (Hybrid)

R.E. Mason; United States; Hybrid; CAD 90,000 - 120,000; Full time

Benefits offered by this job

ESOP

Retirement plan

Medical Insurance

Life Insurance

Paid leave

Parental leave

Company holidays

Career development

EAP

Hybrid work schedules

Job summary

Robert E. Mason & Associates, Inc. is seeking a Senior Systems and Network Administrator to design, secure, and support the company’s infrastructure, including servers, cloud services, networks, and cybersecurity.

The role involves architecture involvement, hands-on implementation, and ongoing optimization, with collaboration across security, applications, data, and operations teams, plus occasional travel and after-hours support.

Qualifications

• Five+ years in systems/network administration or similar role.
• Strong experience with AD, Azure, M365, Windows Server and Windows desktops.
• Knowledge of TCP/IP, DNS, DHCP, routing, switching, VLANs, firewalls, VPNs, secure remote access.
• Experience designing, documenting, implementing, and supporting system and network solutions.
• Experience with virtualization, backup/recovery, and shared-storage tech (VMware, Hyper-V, Veeam, Pure Storage).
• Familiarity with NIST or ISO 27001 security frameworks.

Responsibilities

• Design, implement, administer, and support server, cloud, virtualization, storage, backup, network, and security infrastructure.
• Develop practical architectures balancing security, reliability, scalability, cost, and supportability.
• Configure and support routing, switching, firewalls, wireless networks, VPNs, DNS, DHCP, and secure remote access.
• Monitor performance and troubleshoot complex system, network, and connectivity issues.
• Plan upgrades, patches, migrations, and configuration changes.
• Maintain least-privilege access, segmentation, logging, and security controls.
• Support hosted customer control systems and industrial software environments with secure access and connectivity.
• Automate repetitive tasks and lead infrastructure initiatives from design to operations.

Skills

Strong troubleshooting

Cross-functional collaboration

Documentation

Customer service

Security mindset

Education

Associates or Bachelor's in IT/CS

Tools

Active Directory

Microsoft Entra ID/Azure

Microsoft 365

Windows Server

VMware

Hyper-V

Veeam

Pure Storage

Firewall/VPN/VLAN knowledge

Job description

Robert E. Mason & Associates, Inc. is seeking a Senior Systems and Network Administrator to design, secure, and support the company’s infrastructure, including servers, cloud services, networks, and cybersecurity.

The role involves architecture involvement, hands-on implementation, and ongoing optimization, with collaboration across security, applications, data, and operations teams, plus occasional travel and after-hours support.