Sean Ryan
PREVOST CONSTRUCTION / SKYLINE CONSTRUCTION
San Marcos,CA
1
Certification
31
years of professional experience
Sr. Systems Administrator designs and supports Microsoft 365, Active Directory, Windows Server, VMware, and SonicWall environments for distributed business operations. Built the full technology stack for a new 30+ office headquarters and remote construction jobsites, covering networking, cabling, wireless, secure connectivity, and conference room AV. Owns infrastructure strategy, vendor coordination, licensing, procurement, and end-user support with limited resources.
Work History
Sr. Systems Administrator
17 Years 7 Months- Served as Prevost Construction's sole IT professional for approximately 14 years, supporting about 75 employees across the corporate office and remote construction locations.
- Administered Microsoft 365, Exchange Online, Teams, SharePoint Online, Active Directory, Windows Server, VMware infrastructure, SonicWall firewalls, enterprise networking, backups, and end-user systems.
- Designed and implemented the complete technology environment for a new 30+ office headquarters during a full building redevelopment; coordinated IT and AV requirements with construction teams and outside vendors.
- Designed the MDF/server room, rack and cabling infrastructure, network topology, wireless coverage, and conference room AV systems.
- Designed and deployed remote jobsite offices from the ground up, including internet service, networking, secure connectivity, workstations, printers, and supporting equipment.
- Maintained virtualized server infrastructure supporting domain controllers, file services, backup systems, and Crestron AV services.
- Managed technology purchasing, licensing, vendor relationships, lifecycle planning, and an annual IT budget of approximately $100K-$200K.
- Following the Skyline acquisition, continued supporting infrastructure and users while collaborating with dedicated Microsoft 365, SharePoint, and SonicWall administrators.
- Prevost Construction was acquired by Skyline Construction in 2023.
Systems Engineer
6 Years- Supported IT infrastructure and business systems in large luxury resort, ensuring seamless operations in high-demand environment.
- Administered Windows infrastructure, Active Directory, networking, and desktop systems to enhance reliability and support resort departments.
- Collaborated with resort management, engineering, staff, and vendors on troubleshooting and implementing systems and technology upgrades.
Site Network Administrator
2 Years- Designed and supported campus network infrastructure, structured cabling, servers, user accounts, workstations, printers, and security upgrades to enhance system reliability.
- Administered network infrastructure, ensuring optimal performance and reliability across campus systems.
- Monitored network security, implementing protocols to safeguard sensitive information and prevent breaches.
- Configured and maintained routers, switches, and firewalls to support seamless connectivity for users.
Computer Technician
5 Years- Delivered onsite and telephone desktop/network support, installed systems, troubleshot issues, maintained equipment, and trained business clients on technical processes.
- Diagnosed and repaired hardware and software issues to ensure optimal system performance.
- Configured and maintained computer networks, enhancing connectivity and security across multiple platforms.
- Provided technical support to clients, resolving inquiries efficiently and improving customer satisfaction levels.
Education
Bachelor of Science - Computer Science
A.A.
Skills
Microsoft 365
Exchange Online
Entra ID
SharePoint Online
Windows Server
Azure administration
PowerShell scripting
Microsoft Intune
VMware
Hyper-V
SonicWall
UniFi
Backup and disaster recovery
Infrastructure planning
Vendor management
Procurement
Structured cabling
MDF/server room design
Patch management
Endpoint management
Asset lifecycle management
Certification
Microsoft Certified: Azure Fundamentals (AZ-900) — Microsoft, 2026
Microsoft 365 Administrator (MS-102) — In Progress
Timeline
Sr. Systems Administrator
PREVOST CONSTRUCTION / SKYLINE CONSTRUCTION
01.2009 - CurrentRead More
Systems Engineer
LA COSTA RESORT AND SPA (NOW OMNI LA COSTA)
01.2003 - 01.2009Read More
Site Network Administrator
GUAJOME PARK ACADEMY
01.2001 - 01.2003Read More
Computer Technician
PACIFICOM
01.1996 - 01.2001Read More
Palomar College
A.A.
Read More
San Diego State University
Bachelor of Science from Computer Science
Read More