521 Best national security Jobs in Irvine, California (May 2026)

System Administrator

3 days ago

Irvine

The Systems Administrator primarily performs monitoring, maintenance, installation, upgrades, and end-user support on Windows Domain servers and related hardware & software infrastructure across multiple sites. This will involve using best practices for deployment and management of systems as well as responding to and diagnosing problems through discussion with support teams and end users, including problem recognition, research, isolation, resolution, documentation and follow-up steps Essential Duties and Responsibilities • Support Linux workloads running on virtualized hyperconverged and cloud platforms., • Knowledge of Kubernetes cluster deployment and basic administration of containerized environments., • Familiarity with creating and managing SMB and NFS storage connections., • Perform account creation and maintain PAM configurations., • Applying OS updates and security patches at both the individual server level and cluster level., • Ability to perform analysis of system and application-level logs for troubleshooting., • Manage environment backup systems with the ability to restore service and systems when needed., • Familiarity with system automation tools, primarily Ansible., • Create and maintain documentation, runbooks, and troubleshooting guides., • Analyze & identify upgrades to essential IT systems and make recommendations for systems and servers based on patch release cycles., • Perform daily backup operations, ensuring all required file systems and system data are successfully backed up to the appropriate media and media is recycled., • Manage Office 365 tenant, assigning licenses, enabling or disabling features, troubleshooting issues and, • performing audits and compliance reviews., • Develop, create and maintain scripts to support most repetitious activities., • Support the file storage systems and assign access and permissions as requested or needed., • Enroll and manage devices in our MDM solution., • Support mail and mail flow along with filtering via our mail security suite., • Manage server certificates., • Repair and recover from hardware or software failures and communicate with impacted constituencies., • Create documentation supporting administrative duties assigned in a centralized and shared location. Update, • documentation as needed., • Undertake project work – installing new Windows and Linux based systems, servers and services for specific uses and purposes., • Utilize a helpdesk ticketing system to track projects, log support calls, and keep management up to date with all issues. Additional Responsibilities • Demonstrates high degree of professionalism in communication, attitude and teamwork with customers, peers and, • management, • Demonstrates high level of quality work, attendance and appearance, • Adheres to all Company Policies & Procedures and Safety Regulations, • Adheres to local, state and federal laws, • Performs any other duties that may be assigned by management, • Understands and complies with all company rules and regulations, • Travel up to 10% of the time Qualifications • Bachelor’s degree in Computer Science, Business or equivalent relevant experience., • 3+ years of System Administration experience in a fast-paced corporate environment; retail highly preferred., • Strong understanding of Windows Domain Group Policy necessary to support and enforce company HR, Network, Security, and/or Regulatory Compliance policies., • Strong understanding of Exchange (On-Premise), Exchange Online roles, and O365 management., • Strong understanding of Delegation and Security Group strategies in support of least privilege access control and auditing policies., • Strong understanding of PowerShell AD & Exchange management and automation., • Demonstrate associate level knowledge of Windows Server including but not limited to Active Directory, DNS,, • DHCP, File and Storage, Print and Document, Remote Desktop, Volume Activation, Web Server, and Windows, • Server Update roles and hardware., • Demonstrate basic-to-intermediate knowledge of various virtualization platforms., • Demonstrate basic-to-intermediate knowledge of networking protocols and hardware., • Demonstrate ability to translate complex concepts into simple process flows., • Ability to work independently while executing projects from vision through implementation., • Experience in Azure cloud management., • Flexibility and willingness to work extended hours when necessary. Competencies Ensure Effective Communication • Clearly and professionally communicates technical information to diverse audiences., • Proactively provides updates to stakeholders and escalates issues appropriately., • Listens attentively and incorporates feedback to improve service delivery. Establish Trust • Consistently follows through on commitments and demonstrates accountability., • Handles sensitive and confidential information with integrity and discretion., • Promotes and models company values, standards, and compliance requirements. Problem Solving & Ownership • Takes ownership of complex technical issues through resolution., • Identifies root causes and recommends long-term solutions to prevent recurrence., • Demonstrates sound judgment in incident response and escalation Boot Barn Benefits & Additional Compensation Opportunities • Competitive hourly rate., • Merchandise discount: 50% off of Exclusive Brands and 40% off of third-party brands., • Paid Time Off plan for year-round Boot Barn Partners., • Medical, Dental, Vision and Life Insurance., • 401(k) plan with generous company matching., • Flexible schedules and work/life balance., • Opportunities for growth at every level – we are opening 50+ new stores each year. **For eligible Boot Barn Partners PAY RANGE: $100,000.00 - $115,000.00/yr *compensation varies based on geography, skills, experience, and tenure Physical Demands In general, the following physical demands are representative of those that must be met by a Partner to successfully perform the essential functions of this job. Reasonable accommodations may be made to allow differently abled individuals to perform the essential functions of the job. • Standing, walking and squatting less than fifty percent of the work shift., • Required to lift, move and carry up to 40 pounds., • Ability to read, count and write to accurately complete all documentation and reports., • Must be able to see, hear and speak in order to communicate with partners and customers., • Specific vision abilities include close vision, distance vision, peripheral vision, depth perception and ability to adjust focus., • Manual dexterity required using hands to finger; handle, feel and type; reach with hands and arms. [ ] Sedentary: Limited activity, no lifting, limited walking [ X ] Light: Office work, some lifting, bending, stooping or kneeling, walking [ ] Moderate: Mostly standing, walking, bending, frequent lifting [ ] Arduous: Heavy lifting, bending, crawling, climbing Work Environment In general, the following conditions of the work environment are representative of those that a Partner encounters while performing the essential functions of this job. Reasonable accommodations may be made to allow differently abled individuals to perform the essential functions of the job within the environment. • The workspace is clean, orderly, properly lighted and ventilated with the proper safety compliance., • Noise levels are considered moderate. Boot Barn, Inc. reserves the right to make exceptions to modify or eliminate this document or its content. This document supersedes all previous policies, procedures or guidelines pertaining to this subject. Our core value of community bands us together in supportive and inclusive ways to drive our collective success. Boot Barn provides equal employment opportunity to all applicants and employees without regard to race, color, religion, sex, sexual orientation, age, national or ethnic origin, veteran or military status, disability, as well as any other protected status under the law. Americans with Disabilities Act (ADA) - Boot Barn will provide reasonable accommodations (such as a qualified sign language interpreter or other personal assistance) with the application process upon your request as required by applicable laws. If you have a disability and require assistance in this application process, please visit your nearest Boot Barn Store or Distribution Center or reach out to Human Resources at 1-949-453-4400, Option 4. _

National security jobs in Irvine, CaliforniaCreate job alerts

Popular jobs searches in Irvine, California

Popular national security jobs locations