FOUR SQUARED SOLUTIONS
About the job IT Infrastructure Manager
IT Infrastructure Manager (Windows)
Location:
South Florida Employment Type:
Full-time Seniority Level:
Senior Environment:
Mid-sized, fast-paced organization
Position Overview:
We are seeking an experienced and hands-on IT Infrastructure Manager (Windows) to lead and manage the administration of our Windows-based IT systems and messaging platforms. This role is vital to the successful operation, security, and scalability of our enterprise environment, which includes Active Directory, Exchange Server, Office 365, and Azure AD. The ideal candidate is a self-driven, senior professional who thrives in a hands-on role and has extensive experience in managing Windows Server environments, Exchange systems, and other core Microsoft technologies.
This position will require a deep understanding of Windows Server (2016/2019/2022), Exchange (on-prem and hybrid), and Microsoft 365 services, as well as a proactive approach to system optimization, troubleshooting, and security compliance.
Key Responsibilities:
Windows Systems Administration:
Manage and maintain
Windows Server (2016/2019/2022) infrastructure, including Active Directory, Group Policy, DNS, DHCP, file/print services, and network shares. Monitor system performance, availability, and capacity
to ensure a stable and secure operating environment. Implement and
enforce security measures
(e.g., patch management, vulnerability remediation, security policies) to maintain system integrity and compliance with organizational standards. Administer virtualization environments
using VMware or Hyper-V, ensuring optimal resource allocation and system performance. Messaging & Exchange Administration:
Oversee and support
Exchange Server environments
(2016/2019) and
hybrid Exchange Online setups , managing mail flow, connectors, retention policies, transport rules, and public folders. Troubleshoot mail delivery
and handle anti-spam/anti-malware configurations to ensure secure and reliable communications. Execute migrations
and upgrades, such as moving from Exchange to Exchange Online or migrating mailbox data between environments. Microsoft 365 / Office 365 Administration:
Manage Microsoft 365 tenant services , including Exchange Online, SharePoint Online, Teams, OneDrive, and Azure Active Directory. Administer M365 security tools such as
DLP, M365 Defender, Conditional Access, and MFA , to ensure user and data security. Manage
user provisioning, license assignments, and access controls
via Azure AD/Entra, ensuring proper permissions and compliance. Utilize
PowerShell scripting
to automate administration tasks, streamline reporting, and improve operational efficiency. Leadership & Collaboration:
Provide leadership and technical direction to a small team of IT professionals, ensuring they are aligned with organizational goals and standards. Collaborate with other IT teams
to support cross-functional projects and ensure smooth system integrations and operations. Mentor junior administrators
and foster a culture of continuous learning and improvement within the IT department. Qualifications:
Required:
8+ years of hands-on experience
in a Windows systems administration role, with a strong background in Windows Server, Active Directory, Exchange, and Office 365. Proven expertise in managing hybrid environments , including on-prem and cloud solutions (Exchange Server, M365, Azure AD). Advanced knowledge of Windows Server
(2016/2019/2022) and related technologies, with a focus on security, performance tuning, and troubleshooting. Strong PowerShell scripting skills
for automating administrative tasks and system management. Solid understanding of
networking principles
and
security best practices
for enterprise IT infrastructure. Ability to manage complex IT environments and handle critical incidents or system outages effectively. Preferred:
Bachelors degree
in Information Technology, Computer Science, or a related field. Microsoft certifications
such as:
Microsoft Certified: Windows Server Hybrid Administrator Associate Microsoft 365 Certified: Enterprise Administrator Expert Microsoft Certified: Messaging Administrator Associate
Experience with
VMware or Hyper-V virtualization platforms .
About Us:
At
Four Squared Solutions , we provide innovative IT staffing, managed solutions, and consulting services that empower organizations to thrive. Headquartered in South Florida, we help our clients build dynamic IT teams and deliver exceptional technology solutions. We believe in connecting great people with great opportunities, fostering success both for individuals and businesses.
Equal Opportunity Employer (EOE): Four Squared Solutions is an equal employment opportunity/affirmative action employer. We do not discriminate against any qualified individual based on sex, race, color, national origin, religion, sexual orientation, age, marital status, mental, physical or sensory disability, or any other classification protected by applicable laws. We comply with all employment eligibility verification requirements.
IT Infrastructure Manager (Windows)
Location:
South Florida Employment Type:
Full-time Seniority Level:
Senior Environment:
Mid-sized, fast-paced organization
Position Overview:
We are seeking an experienced and hands-on IT Infrastructure Manager (Windows) to lead and manage the administration of our Windows-based IT systems and messaging platforms. This role is vital to the successful operation, security, and scalability of our enterprise environment, which includes Active Directory, Exchange Server, Office 365, and Azure AD. The ideal candidate is a self-driven, senior professional who thrives in a hands-on role and has extensive experience in managing Windows Server environments, Exchange systems, and other core Microsoft technologies.
This position will require a deep understanding of Windows Server (2016/2019/2022), Exchange (on-prem and hybrid), and Microsoft 365 services, as well as a proactive approach to system optimization, troubleshooting, and security compliance.
Key Responsibilities:
Windows Systems Administration:
Manage and maintain
Windows Server (2016/2019/2022) infrastructure, including Active Directory, Group Policy, DNS, DHCP, file/print services, and network shares. Monitor system performance, availability, and capacity
to ensure a stable and secure operating environment. Implement and
enforce security measures
(e.g., patch management, vulnerability remediation, security policies) to maintain system integrity and compliance with organizational standards. Administer virtualization environments
using VMware or Hyper-V, ensuring optimal resource allocation and system performance. Messaging & Exchange Administration:
Oversee and support
Exchange Server environments
(2016/2019) and
hybrid Exchange Online setups , managing mail flow, connectors, retention policies, transport rules, and public folders. Troubleshoot mail delivery
and handle anti-spam/anti-malware configurations to ensure secure and reliable communications. Execute migrations
and upgrades, such as moving from Exchange to Exchange Online or migrating mailbox data between environments. Microsoft 365 / Office 365 Administration:
Manage Microsoft 365 tenant services , including Exchange Online, SharePoint Online, Teams, OneDrive, and Azure Active Directory. Administer M365 security tools such as
DLP, M365 Defender, Conditional Access, and MFA , to ensure user and data security. Manage
user provisioning, license assignments, and access controls
via Azure AD/Entra, ensuring proper permissions and compliance. Utilize
PowerShell scripting
to automate administration tasks, streamline reporting, and improve operational efficiency. Leadership & Collaboration:
Provide leadership and technical direction to a small team of IT professionals, ensuring they are aligned with organizational goals and standards. Collaborate with other IT teams
to support cross-functional projects and ensure smooth system integrations and operations. Mentor junior administrators
and foster a culture of continuous learning and improvement within the IT department. Qualifications:
Required:
8+ years of hands-on experience
in a Windows systems administration role, with a strong background in Windows Server, Active Directory, Exchange, and Office 365. Proven expertise in managing hybrid environments , including on-prem and cloud solutions (Exchange Server, M365, Azure AD). Advanced knowledge of Windows Server
(2016/2019/2022) and related technologies, with a focus on security, performance tuning, and troubleshooting. Strong PowerShell scripting skills
for automating administrative tasks and system management. Solid understanding of
networking principles
and
security best practices
for enterprise IT infrastructure. Ability to manage complex IT environments and handle critical incidents or system outages effectively. Preferred:
Bachelors degree
in Information Technology, Computer Science, or a related field. Microsoft certifications
such as:
Microsoft Certified: Windows Server Hybrid Administrator Associate Microsoft 365 Certified: Enterprise Administrator Expert Microsoft Certified: Messaging Administrator Associate
Experience with
VMware or Hyper-V virtualization platforms .
About Us:
At
Four Squared Solutions , we provide innovative IT staffing, managed solutions, and consulting services that empower organizations to thrive. Headquartered in South Florida, we help our clients build dynamic IT teams and deliver exceptional technology solutions. We believe in connecting great people with great opportunities, fostering success both for individuals and businesses.
Equal Opportunity Employer (EOE): Four Squared Solutions is an equal employment opportunity/affirmative action employer. We do not discriminate against any qualified individual based on sex, race, color, national origin, religion, sexual orientation, age, marital status, mental, physical or sensory disability, or any other classification protected by applicable laws. We comply with all employment eligibility verification requirements.