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Sr. Systems Administrator

Job in San Diego, San Diego County, California, 92189, USA
Listing for: Applications International Corporation
Full Time, Per diem position
Listed on 2026-07-14
Job specializations:
  • IT/Tech
    Cloud Computing: Infrastructure & Operations, Systems Administrator, Cybersecurity, Systems Engineer
Salary/Wage Range or Industry Benchmark: 110000 - 130000 USD Yearly USD 110000.00 130000.00 YEAR
Job Description & How to Apply Below

We are a dynamic SaaS company building innovative software solutions that make a difference in the Environmental Health Risk and Safety industry. Our collaborative team is passionate about technology and committed to excellence. We are looking for a talented and skilled Senior Systems Administrator to join our team in San Diego, CA and help drive our technical vision forward.

THIS IS AN ON-SITE POSITION IN SAN DIEGO, CA 92127.

Important Note:

This is a full-time, on-site with benefits role in San Diego, CA. We are only considering local candidates at this time. Relocation assistance is not available.

  • Competitive Salary Range: $110,000-$130,000 per year DOE
The Role

We are looking for a Senior Systems Administrator who will own the design, implementation, and reliability of an organization's core server and cloud infrastructure. The role will handle the most complex technical work in the operations team, mentor junior administrators, lead infrastructure projects, and serve as the senior escalation contact for critical system outages. It bridges individual technical contribution and team leadership.

Duties

and Responsibilities
  • Architect, implement, and maintain our hybrid infrastructure (on-premises servers and Azure cloud) supporting business-critical SaaS applications
  • Lead infrastructure projects end-to-end: requirements gathering, design documentation, implementation, testing, and transition to operations
  • Serve as the primary escalation contact for complex incidents involving servers, storage, identity, and cloud components
  • Build and maintain automation using Power Shell and infrastructure-as-code tools (Terraform, Ansible) to reduce manual overhead
  • Manage our identity environment:
    Active Directory, Azure AD / Entra , Group Policy, and conditional access policies
  • Maintain infrastructure documentation: architecture diagrams, runbooks, change history, and disaster recovery procedures
  • Lead DR planning and testing: validate RTO/RPO targets, test backup systems, and run periodic tabletop exercises
  • Participate in security reviews, vulnerability management, and risk assessments
  • Pitch in across IT as needed as this is a small team and everyone contributes
  • Other duties as assigned.
The Ideal Candidate Education
  • 5–10 years of progressive systems administration experience, with at least 3 to 4 years in a role with genuine technical ownership
  • Track record of leading or substantially contributing to infrastructure projects and not just executing tasks
  • Experience with disaster recovery planning, testing, and documentation
  • Bachelor's degree in Computer Science, Information Systems, or equivalent experience accepted
Core Technical Skills
  • Virtualization: VMware vSphere/vCenter or Hyper-V in a production environment
  • Identity:
    Active Directory forest management, Group Policy, PKI fundamentals
  • Automation:
    Power Shell scripting at a production level;
    Terraform or Ansible experience a strong plus
  • Monitoring: experience configuring and tuning at least one platform (Azure Monitor, Datadog, PRTG, or similar)
Technical Preferences
  • Microsoft certifications: AZ-104 (Azure Administrator) or AZ-305 (Azure Solutions Architect) — valued but not a gate
  • Enterprise storage experience (Net App, Dell EMC, Pure Storage, or similar)
  • Exposure to security frameworks or compliance programs (SOC 2, HIPAA, NIST)
  • Experience in a SaaS or software product environment
Competitive

Salary and Benefits Package
  • Competitive salary range: $110,000-$130,000 per year DOE
  • 401K Retirement with a generous 6% employer match – 100% vested immediately
  • Medical Coverage (HMO & PPO options) –100% paid by employer for employee and their dependents
  • Employer-paid life insurance
  • Dental and Vision coverage
  • Vacation Time Off
  • Paid Holidays
  • Wellness Program including weekly chair massage and in-office gym
  • Company-provided daily office snacks
  • Dog-friendly office
Work Schedule & Location
  • Monday to Friday, 8 AM to 5 PM; occasional weekends depending on business needs
Physical Requirements

The physical demands are representative of those that must be met by an employee to successfully perform the essential functions of this job with or without reasonable accommodation.

This position primarily involves…

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