Senior Systems Administrator

Quantum Electronic Payments•Anaheim, CA

22d•Onsite

About The Position

Quantum ePay® is a growing fintech company focused on delivering innovative payment processing solutions and merchant technology that helps businesses lower costs, earn more, and operate with confidence. We power mission-critical payment processing platforms used by merchants and partners across the U.S. We are looking for a dependable, hands-on Senior Systems Administrator to support and help manage our internal IT environment, systems, infrastructure, and security operations. This role will work directly with our Chief Engineering Officer and serve as the senior onsite IT resource for employees, systems administration, technical escalations, and internal technology improvements. This role is a great fit for someone who takes initiative, stays organized, communicates clearly, and enjoys keeping systems secure, reliable, and running smoothly. The Senior Systems Administrator will help ensure our employees have the access, equipment, systems, and support they need, while also helping strengthen our IT processes, documentation, and overall system reliability.

Requirements

5+ years of experience in systems administration, IT administration, infrastructure support, or a similar role
Strong experience with Microsoft 365, Active Directory, Windows environments, user access management, and endpoint support
Comfortable supporting both hardware and software issues in an onsite office environment
Working knowledge of networking concepts including DNS, DHCP, VPN, firewalls, switches, and wireless networks
Experience with endpoint management, patch management, device security, backups, and system monitoring
Solid understanding of security best practices including MFA, least privilege access, phishing awareness, endpoint protection, and user access reviews
Ability to troubleshoot technical issues independently and communicate updates clearly
Strong documentation habits and attention to detail
Comfortable working in a smaller company environment where priorities may shift and ownership is important
Professional, dependable, responsive, and service-minded
Able to communicate clearly with both technical and non-technical employees

Nice To Haves

Experience in fintech, payment processing, banking, financial services, or another compliance-focused environment
Familiarity with PCI DSS, SOC, or similar security/compliance frameworks
Experience with EDR/MDR tools, vulnerability scanning, SIEM tools, or security monitoring platforms
Experience supporting both Windows and Mac devices
PowerShell scripting or basic automation experience
Experience improving onboarding/offboarding processes, access control, documentation, or IT asset management
Certifications such as CompTIA Security+, Network+, Microsoft certifications, or similar
Prior experience leading a small IT support function or serving as the primary IT point of contact for a business

Responsibilities

Manage and maintain company IT systems, user accounts, access permissions, hardware, software, and internal technology tools
Administer Microsoft 365, Active Directory, email, MFA, shared drives, security groups, and other business systems
Support onboarding and offboarding from an IT perspective, including account setup, access provisioning, equipment preparation, and access removal
Serve as an escalation point for the Desktop Support Technician and assist with more complex technical issues
Support laptops, desktops, printers, phones, conference room equipment, VPN access, and other onsite technology needs
Monitor system performance, troubleshoot issues, and help resolve outages or service interruptions
Maintain endpoint security, patching, device compliance, antivirus/EDR tools, and system updates
Support network equipment and basic network troubleshooting, including firewalls, switches, wireless access points, DNS, DHCP, and VPN
Maintain backups, disaster recovery procedures, and business continuity documentation
Track IT assets, licenses, equipment inventory, and system documentation
Create and maintain IT procedures, troubleshooting guides, onboarding/offboarding checklists, and internal support documentation
Coordinate with vendors and service providers as needed
Partner with the Chief Engineering Officer on IT priorities, security improvements, system upgrades, and internal technology projects
Identify opportunities to improve IT processes, reduce recurring issues, and strengthen system reliability and security