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Name : Krishna Mohan S
Email : krishnamohan.s@live.in
Cellular : 9943329299, 9994089111
Skype : krsnanzs
Gtalk : krsnanzs
http://in.linkedin.com/in/krsnanzs
http://facebook.com/krsnanzs
http://linuxblogs.wetpaint.com/


Objective

A position as a Senior Network/Systems Administrator that lets me utilize my extensive network administration experience and team management skills. To aggressively and successfully manage Local and Wide Area Computer Networks and provide maintenance, troubleshooting and support for reliability and growth.

Summary
12 years of cross-platform experience in systems administration including analyzing, designing, installing, maintaining, and repairing hardware, software, peripherals and networks. Superior troubleshooting and technical support abilities with migrations, network connectivity, and security. Work well alone or in a group and also have experience managing groups. Employs an unwavering work ethic with an insatiable desire to learn and develop professional skills. My technical experience and interests as a system and network administrator focuses mainly on Linux and Open Source software. Linux systems and network administration are my primary interests.

Technical Skills

Operating Systems:
Linux (Arch, Centos, SuSE, Fedora, Debian, Slackware, Ubuntu, igelle)
Free BSD, PC-BSD
Desktop support of Windows 95/98/NT/2000/XP Clients Windows NT, 2000, 2003 Server.
Cisco IOS

Networking:
Complete understanding of the OSI & DOD model
Network troubleshooting
Server configuration
Physical network maintenance and upgrades
Basic switch and router maintainence
Familiar with Intel's PXE netboot protocol
DHCP
DNS
SNMP

Security:
Secure internet services
LAN/WAN security, VPN
Firewalls (Ipcop, Smoothwall, Iptables)
IPSEC
Encryption (PGP, GnuPG, SSL)
SSH (SSH v1, v2 and OpenSSH)

Host-based security:
OS hardening, disabling or encrypting unsafe network services
Security Policy Design, Implementation
Network/Host Security Auditing

Software:
Apache HTTP/HTTPS servers (versions 1.3.x/2.0)
DNS (BIND 8/9)
Vi, and ViM
NFS
NTP
POP, IMAP, IMAPS
SMTP (Postfix, Sendmail, Zimbra)
Samba
Squid

Hardware:
All forms of x86 hardware (from laptops to quad Xeon CPU servers)
Sun SPARC hardware Sun Netra V120 & 240
Cisco routers/switches/terminal servers
Lots of co-location facility experience, large server installations, racking, power management, etc

Protocols: TCP/IP, UDP, PPP, HDLC, ATM, Fast Ethernet, Gigabit Ethernet, SMTP/POP3/IMAP/LDAP, FTP, VTP, STP, Telnet, SSH, SNMP, DHCP, DNS, Frame relay, RIP, RIP2, OSPF, EIGRP, SIP, IAX, IAX2, skinny, H.323

VIRTUALIZATION:
Proxmox VE, Vmware server & workstation, VirtualBox

VoIP:
I have experience installing and configuring Asterisk and Asterisk based software IP-PBX's like Elastix, AsteriskNOW, PBX in a Flash, Predictive Dialers like Vicidial Call Center Suite and Trixbox systems for small office use, along with configuring firewalls to handle VoIP traffic efficiently. Cisco, Soyo and Grandstream IP Phones Softphones like X-lite, Eye-Beam and Wengo Phone. Digium TDM voice cards like Digium Wildcard X100P, TE122P, TE220P and TDM400P interface cards, Sipura, VoicePulse & Linksys ATA's and other IPT products. Install configure and maintain class 5 soft switch like Voip Switch. Implement quality of service (QoS) in challenging connectivity environments.

Experience
[05/2007 - present]
"Sharon Technologies" - Network administrator
Voice and data communications technical lead for the company. Involvement in a number of initiatives related to improved centralized and automated network management systems to meet corporate goals with minimum capital expenditure. Lead for the network re-architecture efforts to facilitate better product delivery to customers. Team of 5.

[03/2005 - 02/2007]
"Shavin Infotech" - Network Operations Support Specialist
Designed, installed and administered the 40 seater call center from scratch. Installed and maintained all networking and telecommunication equipment, including leased line. Installed and configured Predictive-dialer from scratch with open-source tools. Managed all aspects of network implementations including network planning, design, testing, documentation, deployment and maintenance of Linux based systems. Responsible for complete support, installation, maintenance of all network and system components. Besides technical support, performed many functioning aspects of a systems administrator. Supported LAN with printing and Internet. Monitored hardware and software functionality 24/7 to ensure their connectivity and availability. Conducted research on proposed system upgrades and identified potential incompatibilities that led to alternative system purchase.

[6/2000 - 6/2005]
"World Net" - Systems Administrator / Tech Support
Installation & Configuration of ADSL1+, ADSL2+ Modems (Beetel, DLink 502T, Zyxel & Net gear)
Troubleshooting remote users through Support Software, Remote Desktop software's.
Installing and Configuring Wireless Security (WEP, WPA) on Beetle Modems.
Technical Support for Dynamic & Static IP Configurations on ADSL Modems.
Install and configure servers, desktops and networking equipments.
Troubleshooting problems with networks, Operating systems and any other hardware related issues.
Troubleshoot hardware, software and network issues.
Install client O/S and software, connect PC's to network and configure new ISP's.
Daily virus, anti spyware prevention measures on all systems/servers.
Maintaining all computers in LAN environment.
Experience in network security and firewall configuration.
Ability to handle continuous calls.

[2/1999 - 4/2000]
"Raam Computers" - Service Engineer
Assembled computers, performed upgrades, analyzed and fixed device conflicts. Consulted customers to choose the proper configuration, for their needs. Installed and managed small networks for residents. Install and configure LAN using various hardware devices such as Hubs, Switches, and NIC and cabling Researched and resolved any technical trouble with Desktops or Laptops. Installed and repaired hardware and software; including scanners, printers, fax machines, copiers, projectors and modems. Evaluate and isolate network problems and implement fixes to ensure problem free network operation. Provide client consulting and training on the problems interfacing and use of the network.Provided technical assistance primarily end-user and small companiesÂ’ networks, and gained experience in servicing & repairing many different types of computer systems.

[11/1998 - 1/1999]
"Smart Systems" - Service Engineer

Education:
L.L.B Discontinued
Advanced Diploma in Computer Hardware and Networking (ADCHM)

Interests & Activities:
• IT Management • Networking • Linux • Virtualization • VOIP • SIP • Asterisk

Beyond that I am extensively self-educated in addition to numerous workshops, classes etc. I feel that my experience has helped to solidify much of my book knowledge. Working with SMB networks and dealing with the day-to-day issues that SMB's face has been very valuable to me personally and I believe has strengthened my skills professionally. I have focused the last 6 years of my career on utilizing open source technologies as a profitable business strategy, adapting quickly to technological trends. I have a strong understanding of open source web architectures including Linux server administration.






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