Microsoft 365 Technical Support Engineer Jobs in Riverside, CA

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Systems Engineer III - Microsoft Cloud & Infrastructure
We are seeking a highly skilled Systems Engineer III - Microsoft Cloud & Infrastructure to serve as a senior technical resource for Microsoft cloud services, server infrastructure, identity management, backup and disaster recovery, and escalated support.
The ideal candidate brings extensive experience in Microsoft technologies and MSP environments, with the ability to resolve complex technical issues, mentor junior engineers, improve technical standards, and provide practical guidance to clients and internal teams.
This role focuses primarily on systems, cloud, identity, infrastructure reliability, documentation, and operational improvement. Primary ownership of networking, WAN, wireless, firewall, VoIP, and telecom platforms is expected to sit with a separate Network & Security role.
Key Responsibilities:
Technical Leadership & Escalations

• Serve as a senior escalation point for complex technical issues involving Microsoft 365, Windows Server, cloud services, identity platforms, and backup infrastructure.

• Perform advanced troubleshooting and root-cause analysis across servers, cloud services, authentication systems, endpoint systems, and client environments.

• Provide technical mentorship and guidance to junior engineers and support staff.

• Create customer-ready summaries, technical recommendations, and remediation plans.

• Support service reviews and escalation discussions by identifying practical next steps and long-term remediation opportunities.

Solution Design, Standards & Architecture

• Design and recommend scalable infrastructure, cloud, and identity solutions that align with client business and technical requirements.

• Evaluate existing environments and recommend improvements to reliability, security, performance, and supportability.

• Establish and promote technical standards, best practices, and repeatable configurations across supported environments.

• Contribute to standardization initiatives that improve consistency, efficiency, and engineer effectiveness.

Windows Server & Infrastructure

• Lead the administration and optimization of Windows Server environments.

• Support Active Directory, Group Policy, DNS, DHCP, DFS, file services, and identity infrastructure.

• Troubleshoot domain controllers, authentication issues, replication problems, file permissions, and server performance concerns.

• Support environment transitions and inherited infrastructure stabilization efforts.

• Maintain system reliability, performance, and operational readiness.

Microsoft 365 & Cloud Services

• Administer and support Microsoft 365 environments, including:

• Exchange Online

• SharePoint Online

• Microsoft Teams

• OneDrive

• Entra ID

• Manage user lifecycle processes including onboarding, offboarding, licensing, and access management.

• Troubleshoot email delivery, authentication, collaboration, permissions, and synchronization issues.

• Support Azure Virtual Desktop (AVD) and Remote Desktop Services (RDS) environments.

• Support Microsoft 365 tenant migrations, onboarding activities, cloud adoption, and platform modernization efforts.

Identity & Security

• Implement and support:

• Multi-Factor Authentication (MFA)

• Conditional Access policies

• Identity governance controls

• Access management controls

• Assist with security investigations, remediation activities, and policy-related troubleshooting.

• Support endpoint security tools including Huntress, SentinelOne, and related platforms.

• Promote security best practices and help organizations improve their security posture.

• Participate in security reviews and compliance-related initiatives.

Backup & Disaster Recovery

• Administer and support backup and business continuity platforms, including Datto, Axcient, and comparable solutions.

• Monitor backup success and remediation requirements.

• Validate restores and recovery procedures.

• Assist with disaster recovery planning and testing exercises.

• Support backup platform transitions and recovery readiness initiatives.

Documentation & Operational Standards

• Develop and maintain documentation for system configurations, procedures, and technical standards.

• Maintain accurate client documentation within approved documentation platforms.

• Ensure consistency, quality, and repeatability across supported environments.

• Identify recurring support issues and recommend documentation, automation, or process improvements to reduce ticket volume.

Strategic Planning & Continuous Improvement

• Proactively monitor system performance and identify opportunities for improvement.

• Assist with capacity planning and future growth strategies.

• Monitor platform health trends and recommend improvements to increase stability and efficiency.

• Stay current with emerging Microsoft technologies, security trends, and industry best practices.

• Recommend new technologies and processes that improve service delivery and operational maturity.

• Work closely with business leaders, account managers, service delivery leaders, and stakeholders to align technical solutions with organizational objectives.

Client Engagement

• Build trusted relationships with clients through professional communication and technical leadership.

• Present technical findings and recommendations in business-friendly terms.

• Coordinate with customers, vendors, and internal teams to drive technical issues to resolution.

• Occasionally travel to customer locations for onsite support, assessments, onboarding activities, and issue resolution.

Qualifications:

• 7+ years of experience in systems engineering, IT infrastructure, or MSP environments.

• Advanced experience supporting Windows Server environments.

• Strong expertise with Active Directory, DNS, DHCP, Group Policy, and file services.

• Extensive Microsoft 365 administration experience.

• Strong understanding of Entra ID, authentication, and identity management.

• Experience implementing and supporting Conditional Access and MFA.

• Experience supporting Azure-based workloads and cloud services.

• Experience with backup and disaster recovery platforms.

• Advanced troubleshooting skills with the ability to resolve complex technical issues.

• Excellent interpersonal, written, and verbal communication skills.

• Ability to mentor junior engineers and collaborate with cross-functional teams.

Preferred Experience:
Azure Virtual Desktop (AVD) and Remote Desktop Services (RDS).
Microsoft Azure administration.
ConnectWise PSA.
IT Glue or similar documentation platforms.
Datto and Axcient backup platforms.
Huntress and SentinelOne.
PowerShell automation.
Microsoft certifications.
Experience supporting infrastructure migrations and modernization efforts.
Experience supporting SMB and mid-market environments in an MSP setting.
Why you'll love working here
At Courser, we prioritize the personal and professional development of our employees. We offer best-in-class training, mentorship, and clear self-promotion paths to help you grow. We foster a culture of innovation and encourage challenging the status quo. With teams located across the country, we leverage a wealth of knowledge and a collaborative spirit, eager to share and grow together.
Benefit Highlights
Competitive benefits package, including medical, dental, vision, and life insurance
401(k) company match
Flexible vacation time*
Paid sick time
10 Holidays including your Birthday and a Floating Holiday!
Healthy Lifestyle reimbursement
Membership Subsidy
40 Hours for Volunteer Time
Paid parental leave
Reimbursement for ongoing certifications
*Flexible vacation time after completing one full year of employment. For the first year of employment,
full-time team members are provided 10 vacation days.
Physical Demands and ADA Requirements
The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform these essential functions.
This is a largely sedentary role. The employee is frequently required to sit/stand for long periods and work on a computer.
The employee must be able to verbally communicate effectively with clients, employees and management to address questions and resolve issues. This involves talking, hearing, and understanding.
This position requires the regular use of a laptop computer and other office equipment. The employee must be able to operate a keyboard and other devices for extended periods.
The employee may be required to occasionally lift or move up to 10 pounds.
Specific vision abilities required by this job include close vision, distance vision, and the ability to adjust focus.
Americans with Disabilities Act (ADA) Statement
Our company complies with the ADA and provides reasonable accommodations to qualified individuals with disabilities in all aspects of employment, including the application process, interviewing, and job performance. If you need a reasonable accommodation to perform the essential functions of the job, please contact us.
Equal Opportunity Employer
Courser is an Equal Opportunity Employer. We support diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, creed, religion, sex, sexual orientation, gender, gender identity, genetic information, national origin, citizenship status, marital status, age, physical or mental disability, caregiver status, veteran status, uniformed service member status or any other category protected by applicable federal, state, or loc