Dennis M. Ritchie

Mt. Prospect, IL ******

847-***-****

Email: adg4ds@r.postjobfree.com

LinkedIn: www.linkedin.com/in/dennis-ritchie-b188b279

Professional Experience:

360Insights Chicago, IL 01/01/2019 thru 03/25/2020

Windows Administrator

Installed and patched Server 2008/2016

Removed Windows 7 & Installed Window 10 64-bit OS's

Upgraded to Office 2016/2019

CentOS (Red Hat Enterprise Linux Open Source) 5, 6 & 7

Digium Phone System IVR creation

Assist with MySQL troubleshooting

Maintain and Support TCP Network

SVN and GIT installations

Upgraded Bugzilla, OTRS

Installed, Configured and used Nagios w/Check_mk monitoring software

Used Bugzilla and Jira problem tracking software

MTC Performance Chicago, IL 02/2012 thru 01/01/2019

Windows Administrator

Patched Windows Server 2003 and Server 2008

Switched company over from Windows XP, first to Windows 7, then to Windows 10 64-bit OS's

Upgraded from Office 2007 /2016

Installed and configured CentOS (Red Hat Enterprise Linux Open Source) 5, 6, and 7

Removed Cisco Phone System, Installed, Configured, and Patched Digium Phone Systems & IVR

Troubleshoot and Backup SVN and GIT installations

Installed, configured and maintained Bugzilla/OTRS

Oversaw moving of email service (over 300 accounts), phone service (over 300 numbers) and internet service

Create Open SSL Certificate Requests

Maintain wired and wireless networks

Installed, Configured, and used Nagios w/Check_mk monitoring software

Installed, configured, and used Bugzilla and Jira problem tracking software

Howard Orloff Imports Chicago, IL 01/2005 thru 11/2011

IT Manager/Network Administrator

Migrated 100+ desktops and laptops from Windows Workgroup to 2003 AD

Specified, Installed, and Configured Server 2003 Domain Controller

Setup 2 SonicWALL firewalls and 1 Netgear firewall

Patched and repaired 130+ desktops and laptops

Installed and administrated ADP Programs and websites associated with FORD dealerships

Installed Jaguar, Land Rover, and Volvo car repair programs

Installed and configured old ADP Customer Relationship Management Software to the Higher Gear CRM application and back

Installed and configured NEC digital phone system to an Avaya Phone system with voice mail

Setup, configure and maintain LAN and Wireless Networks

Visteon Inc. Chicago, IL 03/2004 thru 1/2005

Network Administrator / IT Support

Ensured Smooth startup of Automobile Manufacturing Facility

Supported >100 users in use of ALTA (plant error correction program)

Supported > 50 users in use of Visual Plant (Plant control program)

Used Manage Now (a problem tracking program)

Supported > 100 users on MS Exchange, Windows 98, Windows 2000 (Professional and Server) Active Directory, and Windows XP

Sara Lee Coffee and Tea Bensenville, IL 12/2003 thru 03/2004

Help Desk

Supported >1500 End Users on Windows 2000, Windows XP and Novell

Supported >1500 end users on Dial-Up Networking, VPN and Server Access

Guided other Help Desk support for resolving issues

Genematrix, Inc. Elk Grove Village, IL 03/2000 thru 08/2003

Technical Consultant

Configured and installed Windows NT Domain, Windows 2000 Active Directory, and Exchange Server 5.5 for various customers

Built, loaded and installed Windows 2000 servers, Workstations, MS Windows software, Networks, Tape Backup Systems and UPS

Supported software for precision machining company including CAD/CAM software

Created security policies, wrote security procedures, and monitored for compliance

Configured routers and firewalls

Setup Both Wired and Wireless Networks for Clients

Tomoegawa (U.S.A.) Inc. Wheeling, IL 08/1985 thru 02/2000

Network & Exchange Administrator, AS-400 Administrator 08/1997 through 02/2000

Production Control Senior Staff, AS-400 Administrator 06/1995 through 08/1997

Warehouse Supervisor 06/1993 through 06/1995

Configure, Wire and Maintain LAN

Skills:

Windows Server 2008, 2016, 2019 * Active Directory * Open SSL Certificates (PKI Infrastructure) * Windows 7/8/10 * Microsoft Exchange 2016, 2019 * Red Hat 5/6/7 * Ubuntu Linux * CentOS * Microsoft Office 2016, Office 365 * Bugzilla * OTRS * Version Control Software (GIT & SVN) * MySQL * TCP/IP * Internet Connectivity, DSL, T1, Fiber * SMTP, DNS, FTP, DHCP * AS-400 (CISC and RISC) * Routers, Firewalls, Switches, Hubs * Supervised Employees and Manufacturing Floor * Phone Systems (Digium, Cisco, Avaya) * ADP Software *

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