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Microsoft Defender Jobs in California (NOW HIRING)

acralending

IT System Security Engineer

Irvine, CA · On-site

$110K - $130K/yr

Experience working with tools such as Microsoft Defender, Microsoft Intune, Okta, SIEM platforms, and enterprise firewalls is highly desirable. This role requires a deep understanding of security ...

acralending

IT System Security Engineer

Irvine, CA · On-site

$110K - $130K/yr

Experience working with tools such as Microsoft Defender, Microsoft Intune, Okta, SIEM platforms, and enterprise firewalls is highly desirable. This role requires a deep understanding of security ...

INSPYR Solutions

Sr. Security Engineer

San Jose, CA · On-site

$70 - $84/hr

Microsoft Defender for Cloud, Microsoft Defender for Endpoint, Cisco AMP * Identity & Access: Microsoft Defender for Identity, Azure Active Directory * Data Loss Prevention: Code42, O365 DLP

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Microsoft Defender information

What is a Microsoft Defender?

A Microsoft Defender job typically involves working with Microsoft's security solutions to protect systems, networks, and data from cyber threats. Professionals in this role may focus on threat detection, incident response, vulnerability management, and security policy enforcement. They use Microsoft Defender products, such as Defender for Endpoint and Defender for Office 365, to monitor and mitigate security risks. This role is common in cybersecurity teams within enterprises, managed security service providers (MSSPs), and Microsoft itself. Strong knowledge of cybersecurity principles, threat intelligence, and Microsoft security tools is essential.

What does a Microsoft Defender do?

In a Microsoft Defender security role, your daily responsibilities usually include monitoring security alerts, analyzing potential threats, conducting vulnerability assessments, and responding to incidents using Microsoft technologies. You’ll collaborate with IT and business teams to implement security best practices, perform regular system audits, and continuously optimize defense strategies. The role may also involve preparing security documentation, participating in incident response drills, and providing guidance on the safe use of digital resources. This position is both dynamic and collaborative, often requiring fast problem-solving to protect organizational assets effectively.

What are the key skills and qualifications needed to thrive in the Microsoft Defender position?

To thrive as a Microsoft Defender (Security Engineer or Analyst), you need a solid background in cybersecurity, network administration, and threat detection, often demonstrated by a relevant degree and certifications like CompTIA Security+ or Microsoft Certified: Security Operations Analyst Associate. Mastery of Microsoft security solutions such as Microsoft Defender for Endpoint, Azure Security Center, and SIEM tools is essential. Strong analytical thinking, attention to detail, proactive communication, and teamwork are key soft skills for success in this role. These abilities ensure you can effectively identify and mitigate threats while collaborating with cross-functional teams to maintain organizational security.

What are the most commonly searched types of Microsoft Defender jobs in California?

The most popular types of Microsoft Defender jobs in California are:

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For Microsoft Defender jobs in California, the most frequently searched job titles are:

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Microsoft Defender jobs near you
Infographic showing various Microsoft Defender job openings in California as of August 2026, with employment types broken down into 87% Full Time, 9% Part Time, 2% Temporary, and 2% Contract. Highlights an 90% Physical, 4% Hybrid, and 6% Remote job distribution.

10331: Sr. Engineering Systems Administrator - Microsoft 365

Hyundai Autoever America

Irvine, CA • On-site

$92K - $125K/yr

Full-time

Re-posted 18 days ago

Job description

10331 - Sr. Engineering Systems Administrator - Microsoft 365
Location: Irvine, CA 92614 (5 days on-site)
COMPANY OVERVIEW
Hyundai AutoEver America (HAEA) is the dynamic IT powerhouse behind Hyundai Motor Corporation, a Fortune 500 global leader in the automotive industry. As a key affiliate, we provide cutting-edge Professional and Managed IT Services and Support to top Hyundai affiliate brands including Kia, Genesis, Hyundai Translead, Hyundai Mobis, Hyundai Capital, and Glovis. 
At HAEA, we understand that IT is the cornerstone of today’s fast-evolving digital world. By uniting all IT resources under one roof, we deliver consistent, top-quality solutions while serving as the crucial information link between Hyundai’s Global Headquarters and North American operations. 
HAEA offers a truly global and collaborative environment. Here, you’ll drive innovation, boost operational efficiency, and help shape the future of mobility for the Hyundai Motor Group. If you’re passionate about technology and eager to make a real impact at a world-class company, Hyundai AutoEver America is the place to grow your career. Join us and be part of the transformation that’s driving the future of automotive innovation. 
Website: http://www.haeaus.com 
What you will be doing:
Sr. Engineering Systems Administrator – M365 is a specialized technical professional responsible for the design, implementation, and support of our M365 environment. This role will serve as the technical authority across all M365 services, ensuring secure, scalable, and efficient collaboration solutions that align with business objectives
Architecture & Engineering
  • Design and implement enterprise-grade Microsoft 365 solutions, including Exchange Online, SharePoint Online, OneDrive, Microsoft Teams, and Entra ID.
  • Lead architecture decisions for hybrid and cloud-first environments.
  • Develop and maintain identity and access strategies (SSO, MFA, Conditional Access).
Administration & Operations
  • Manage and maintain the M365 tenant, ensuring high availability and performance
  • Oversee user lifecycle management, licensing, and service configurations.
  • Monitor service health and proactively resolve issues.
Security & Compliance
  • Implement and manage security solutions including Microsoft Defender and compliance tools.
  • Configure Data Loss Prevention (DLP), retention policies, eDiscovery, and insider risk controls.
  • Ensure adherence to security standards and regulatory requirements.
Identity & Access Management
  • Administer Entra ID (Azure AD), including Conditional Access, identity protection, and RBAC.
  • Manage hybrid identity integrations with on-prem Active Directory.
  • Implement modern authentication and certificate-based access.
Collaboration & Productivity
  • Optimize Microsoft Teams, SharePoint, and OneDrive for business productivity.
  • Establish governance for collaboration tools, including lifecycle management and external sharing.
  • Support automation initiatives using Power Platform.
Migration & Integration
  • Lead migrations to Microsoft 365 from on-prem or third-party platforms.
  • Integrate M365 services with enterprise applications and SaaS platforms.
Automation & Scripting
  • Develop automation using PowerShell and Microsoft Graph API.
  • Improve operational efficiency through scripting and process automation.
Incident Management
  • Serve as escalation point for complex technical issues.
  • Conduct root cause analysis and implement preventive solutions.
Governance & Documentation
  • Define policies, standards, and best practices for M365 usage.
  • Maintain technical documentation, runbooks, and procedures.
What we require from you:
  • Bachelor's degree in IT/IS desired or equivalent practical 10+ years of experience in IT Systems Engineering required.
  • 10 years of experience with Microsoft 365 administration and engineering.
  • Microsoft Certification is desired.
  • Awareness of ITIL- highly preferred
  • Core Microsoft 365 Platform Expertise which include:
    1. Deep hands-on knowledge of the major workloads:
  • Microsoft 365 (overall architecture, licensing, tenant management)
  • Exchange Online (mail flow, connectors, hybrid setup, security)
  • SharePoint Online (sites, permissions, governance)
  • Microsoft Teams (voice, meetings, policies, integrations)
  • OneDrive (sync, sharing controls, retention)
B. Experience designing and troubleshooting Identity & Access Management
  • Microsoft Entra ID
  • Hybrid identity (AD Connect, federation, SSO)
  • Conditional Access, MFA, Zero Trust
  • RBAC and least privilege design
  • Identity lifecycle (joiner/mover/leaver)
    1. Deep hands-on knowledge of Security & Compliance
  • Microsoft Defender for Office 365
  • Microsoft Purview
  • Data Loss Prevention, Insider Risk, eDiscovery
  • Information Protection (sensitivity labels, encryption)
  • Threat protection (phishing, malware, Safe Links/Attachments)
    1. Expert Level knowledge of Messaging & Collaboration Architecture
  • Mail routing, SMTP relays, hybrid Exchange
  • Teams telephony
  • External sharing and B2B collaboration
  • Governance strategies
    1. Deep understanding of
  • DNS (MX, SPF, DKIM, DMARC)
  • Certificates and TLS
  • Firewalls, proxies, and endpoints
  • Latency and service connectivity

SALARY RANGE: $110-125K
TEAM CULTURE
Our team thrives on collaboration, innovation, and continuous learning. We foster a supportive environment where every member is encouraged to share ideas and contribute to problem-solving. We value: 

  • Passion for Technology: We are enthusiastic about emerging technologies and their potential to transform the automotive industry. 
  • Agility: We work in an agile environment, adapting quickly to changes and continuously improving our processes. 
  • Teamwork: We believe in the power of teamwork and collaboration, supporting each other to achieve common goals. 
  • Growth: We prioritize personal and professional growth, offering opportunities for learning and development. 
  • Inclusivity: We maintain an inclusive culture where diverse perspectives are valued, and everyone feels welcome. 


Our Company adheres to the equal employment opportunity guidelines set forth by federal, state and local laws. The information requested on this form is sought in good faith and will not be used to discriminate against the applicant based on race, religion or creed, color, national origin, ancestry, physical disability, mental disability, medical condition, genetic characteristics, marital status, sex or gender (which includes pregnancy, childbirth, or related circumstances), gender identity, gender expression, age, citizenship, sexual orientation, family care or medical leave status, military and veteran status, political affiliation, or any other characteristic protected by federal, state and local laws.
 

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