Computer networking Jobs in Concord, CA

Network Administrator II / Senior Systems Engineer

Overview

We're seeking an experienced infrastructure professional to support and maintain a hybrid environment spanning on-premises systems and cloud platforms. This role is responsible for ensuring the reliability, performance, security, and recoverability of enterprise infrastructure.

What You'll Be Doing

• Administer and support VMware environments, including virtual machines, clusters, and virtualization infrastructure
• Manage cloud resources and services within Microsoft Azure
• Support Windows Server environments, patching, upgrades, and system lifecycle management
• Monitor infrastructure performance, capacity, and availability
• Maintain backup, disaster recovery, and business continuity solutions
• Troubleshoot complex infrastructure, storage, virtualization, and cloud-related issues
• Automate operational tasks using PowerShell or infrastructure automation tools
• Collaborate with application, security, and network teams on enterprise initiatives

Ideal Background

• Experience with VMware, Azure, and Windows Server
• Strong understanding of virtualization, storage, backup, and disaster recovery
• Experience supporting enterprise infrastructure environments
• Ability to work independently and drive technical solutions from design through implementation

Additional Skills & Qualifications

Absolute Minimum Qualifications:

- Bachelor’s degree from an accredited college or university with a major in computer science, information processing, or a closely related field.

- Four years of full-time or equivalent qualifying experience designing, installing, administering, and maintaining complex multi-site server operating systems and systems infrastructure, including storage, virtualization, and cloud

- At least one year of experience performing lead duties

- 3–5+ years of hands-on experience administering VMware environments, including vSphere, ESXi, and vCenter

- 2–3+ years of hands-on experience administering Microsoft Azure infrastructure services

- Enterprise Windows Server administration experience

- Experience provisioning and managing virtual machines across VMware and Azure

- Strong understanding of networking concepts, including DNS, DHCP, TCP/IP, firewalls, VPNs, and hybrid connectivity

- Experience supporting system patching, upgrades, lifecycle management, monitoring, capacity, and performance

- Experience supporting disaster recovery, backup, replication, or business continuity solutions

- Strong troubleshooting and problem-solving skills across systems, virtualization, cloud, storage, networking, and enterprise applications

- Ability to work independently, manage competing priorities, and exercise sound technical judgment

- Strong written and verbal communication skills

- Must be authorized to work in the United States

- Must be open to contract-to-hire

- Must be comfortable beginning the assignment 100% onsite

- Must be aligned with the approved contract pay rate and expected conversion compensation before submission

Experience Level

Intermediate Level

Job Type & Location

This is a Contract to Hire position based out of Martinez, CA.

Pay and Benefits

The pay range for this position is $57.42 - $69.80/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a fully onsite position in Martinez,CA.

Application Deadline

This position is anticipated to close on Aug 27, 2026.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We’re a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We’re a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We’re strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We’re building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.