Senior Systems Administrator

Senior Systems Administrator

12+ Months Contract

ONSITE - Miami, FL 33102

Senior Systems Administrator - Enterprise Infrastructure & Cloud Services
Position Overview
We are seeking an experienced Senior Systems Administrator with deep expertise in hybrid cloud environments, enterprise directory services, and virtualized infrastructure. This role requires a technical professional who can manage complex systems across on-premises and cloud platforms while maintaining optimal performance, security, and reliability.

Key Responsibilities
Azure & Cloud Enterprise Services
Administer Azure Enterprise Applications including SSO configuration, conditional access policies, and application lifecycle management
Manage Azure Active Directory (Azure AD/Entra ID) for user provisioning, identity governance, and security compliance
Deploy and optimize Azure virtual machines, storage solutions, and networking infrastructure
Implement Azure security frameworks and monitor compliance across cloud resources
Directory Services & Network Infrastructure
Administer Active Directory Domain Services including domain controllers, organizational units, and Group Policy management
Manage DNS infrastructure ensuring reliable name resolution across hybrid environments
Configure and maintain DHCP services including scope management, reservations, and failover clustering
Implement directory synchronization between on-premises AD and Azure AD environments
Virtualization & Infrastructure Management
Design and manage virtualized infrastructure including VMware vSphere, Hyper-V, or similar platforms
Optimize virtual machine performance, resource allocation, and capacity planning
Implement high availability and disaster recovery solutions for virtualized environments
AWS Cloud Operations
Manage AWS EC2 instances, S3 storage, VPC networking, and security groups
Support hybrid connectivity between on-premises and AWS environments
PowerShell Scripting & Automation
Develop PowerShell scripts for system automation, reporting, and administrative tasks
Create Azure PowerShell and AWS PowerShell modules for cloud resource management
System Administration Excellence
Monitor system performance, troubleshoot complex technical issues, and implement proactive solutions
Maintain comprehensive documentation and follow established change management processes
Collaborate with application teams while ensuring proper security protocols and governance

Required Qualifications
Bachelor's degree in Information Technology, Computer Science, or related field
5+ years of hands-on experience with Azure administration and Azure Enterprise Applications
Strong expertise in Active Directory, DNS, and DHCP management
Proficient in virtualization technologies and backup solution administration
Experience with AWS services and PowerShell scripting
Excellent problem-solving abilities and communication skills
Demonstrated organizational skills and punctual completion of administrative tasks
Proven track record of meeting performance objectives
Preferred Certifications
Microsoft Certified: Azure Administrator Associate
Microsoft Certified: Identity and Access Administrator Associate
VMware Certified Professional (VCP) or similar virtualization certification
AWS Certified Solutions Architect or SysOps Administrator

Technical Skills Required
Advanced Active Directory and DNS
Advanced PowerShell scripting and automation
Backup and disaster recovery planning and implementation
Change management and ITIL framework knowledge
Performance monitoring and capacity planning