Dan Gallacher Email & Phone Number

Lafayette, CO

• Maintaining and improving the Citrix infrastructure including XenApp 6.5, XenDesktop 7.6, Machine Creation Services, and NetScaler versions 10 and 11.
• Troubleshooting issues escalated from our support team which include desktop support, server support, network troubleshooting, and support of many Citrix technologies. In some cases, the resolution requires small.
• Maintaining and improving a network of hundreds of virtual servers running on VMWare, XenServer, and Hyper-V technology. Servers include Active Directory, DNS, DHCP, Microsoft SQL, and hosted Citrix servers.
• Performed regular after-hours maintenance tasks on servers, switches, and firewalls as needed.

Westminster, CO

• With the help of the IT Manager, maintained 80 virtual and physical servers using Microsoft Hyper-V, which included Active Directory, Exchange 2010, IIS, and Microsoft SQL 2008 R2 services on Windows 2008 R2 servers.
• Finished migration from Exchange 2007 to Exchange 2010 HA environment.
• Provided desktop support to internal users including developers.

Denver, CO

• Provided end-user technical support and server and network maintenance to 40+ contracted clients and additional non-contracted clients.
• Provided on-site and phone support.
• Provided regular maintenance on multiple servers across multiple networks, including Windows 2003, 2008, 2008 R2 and CentOS.
• Configured, troubleshot, and managed several Windows services for multiple clients including: Exchange 2003, Exchange 2007, Active Directory, DHCP, DNS, RRAS, WSUS, Terminal Services.
• Deployed, troubleshot, and demoed several Palo Alto firewalls
• Deployed and troubleshot Juniper firewalls for most of our contracted clients

Broomfield, CO

• Maintained 20 virtual and physical servers using VMWare.
• Provided end-user technical support to software development users using Windows, Linux, and Mac operating systems.
• Managed Windows services such as: Active Directory, Microsoft SQL, and Terminal Services.
• Managed several Linux servers running Ubuntu, Solaris, and Debian.
• Configured and maintained multiple open source services including: Bind, DHCP3, Apache, OpenVPN, Samba, MySQL, OpenLDAP.
• Maintained an open source VoIP system using Asterisk/Trixbox server and Cisco and Linksys VoIP phones.

Port Orange, FL

• Maintained over 25 Windows Servers running services including: Active Directory, Exchange, Cisco Call Center, Symantec Enterprise Vault, IIS, MySQL, Microsoft SQL.
• Implemented Group Policy Objects to enforce security, install applications, and map network drives and printers.
• Maintained Cisco firewalls, routers, and switches across 14 buildings.
• Maintained and troubleshot a Cisco VoIP network utilizing QoS and phone VLANs.
• Provided end-user technical support for internal users.
• Configured and maintained a mixed DNS environment using Windows DNS and Bind.

Melbourne, Florida Area

• Received PC related problems and resolved them over the phone or in person.
• Resolved problems such as network connectivity, virus infections, processing speed issues, and hardware failures.
• Provided support for various POP3 mail clients.
• Created Batch scripts to help simplify troubleshooting steps