Linux Systems Admin Resume

Title
Linux Systems Admin

Primary Skills
Linux, Voip, Cisco, CCNA, CCVP

Location
US-NY-NYC

Posted
Feb-16-09

SKILLS:
• OS - Linux: [RHEL 3,4,5, CentOS, SUSE 10, Ubuntu] Windows 2000/XP/server2003, Vista.
• Networking: TCP/IP, NFS/NIS/, Telnet, FTP, Bind(DNS), DHCP, NAT, ifconfig, route, netstat, xinetd, Apache(httpd), Samba, Mail (SMTP, POP3, IMAP), qmail, sendmail
• Security: SSH, SSL, IPtables, TCP Wrappers, Tripwire, port scanners, Nessus audits, Retina, Sentry Tools, Snort, VPN (IPSec, PPTP, L2TP), packet filtering: (Wireshark, tcpdump)

• Admin Tools: linuxconf, vmstat, iostat, top, traceroute, ping, sar, ntop, webmin Nagios, Solardwinds Orion, SNMP, CiscoWorks.
• Hardware: Netscreen, cisco PIX Firewall, Dell PowerEdge series servers, Cisco IOS based devices.

• Databases Systems: MySQL (advanced), PostgreSQL, MS SQL Server 2000/2005
• VoIP: cisco gateways (IAD2400, AS5300), Asterisk (expert), OpenSER (expert), deep understanding of protocols (SIP,H.323,IAX2,MGCP,RTP)
• Office: OpenOffice, MS Office, MS Project, MS Visio
• Programming Skills: Bash scripting, some PHP, Perl, C (gcc), C++, Visual Basic 6.0
• Other: LVM, software/hardware RAID, PXE and Kickstart installation, syslog, Backup (Amanda, tar, bzip), CVS/SVN.
• Virtualization Technologies: VMWare Workstation and Server ESX.
• Languages: English, Spanish
EDUCATION:

• RHCE (Red Hat Certified Engineer) (in progress)

• Cisco Certifications:
• Cisco Certified Network Associate (CCNA).
• Cisco Certified Voice Professional (CCVP).

• Polycom Video and Soundpoint Technical certification Tests.

• Bachelor in Computer Science.
National University of Engineering (www.uni.edu.ni)
Managua Nicaragua, 2000-2005


EXPERIENCE:

Systems Engineer
Flint Telecom Group Inc, New York, NY
[January-2008-Today]
• Designed and maintained class5 softswitch using Asterisk, opensips, Mysql and Web Based frontend.
• Keep track of config changes using Version Control system SVN.
• Centralized Configuration Management using Puppet.
• Automated Backup of system using Amanda.
• Maintain monitoring system solardwinds Orion and Nagios.
• Maintain and troubleshoot Class4 softswitch Nextone.
• Installation of Cisco router and switches.
• Co-ordinated the planning and implementation of upgrades and redesigns of the server network.
• Maintain Call Manager Express on different offices using Cisco IAD2431.

Linux Operations Engineer
[November 2005 -- January-2008]
Vistula Communications Inc. New York, NY www.vistula.com

• Set up numerous gateways and IP-phones like Cisco, Polycom, Vegastream, Sipura, Grandstream, etc.
• Setting up, Configuring , Debugging and Troubleshooting proprietary linux-based IP-PBX platform for carriers customers over US and Latin-American countries.
• Network Configurations, setting up routers (Adtran, Cisco) Switches configuration including (CoS -- Class of Service) and QoS for VoIP,
• Generate, document and implement policies for OS, firewalls, routers as well as Network Servers.
• Set up High-availability solution for platform “V-cube” using cluster of servers with heartbeat, and routers (HSRP).
• Maintained and supported Linux RPM packages including security updates, bug fixes, and feature enhancements
• Install new systems using automated environment through kickstart, and puppet.

Consultant
Nov 2006-Present
I have been doing some private consulting for a while. I'm focus on VoIP implementations including Asterisk PBX,SER, OpenSER, with different voip gateways. Implementations include using and modifying to customer needs the following products: FreePBX, TrixBox, VICIDial callcenter, a2billing Calling Card, and other asterisk gui. My consulting work is primarily done remotely. And is limited to outside of my regular job's hours.

VoIP Telecom Engineer
[July 2005- November 2005]
Precise Networks Inc , Brooklyn, NY www.precisenetworks.net

• Configuring and maintain Cisco Cisco Access Servers AS-5300, proprietary calling cards application, DIDs, setting DS3, DS1 connections, Configuring and Maintaining Lucent's TDM Softswitch, setting carrier providers and Network Administration tasks.
• Manage End User Voice Over IP configuration (SIP & H323 Clients) using the Softswitch System “PlatformExperts”
• Setting up Asterisk server for IPPBX and Calling Card platform for Prepaid users. Set up graphical manager AMP, Flash operator, FreePBX.

VoIP Project Manager
[April 2004-July 2005]
ASI Asesores Informáticos, Managua, Nicaragua. http://abacus-telecom.com

• Worked as a team leader implementing and configuring IP-PBX servers with Asterisk in Nicaragua, Spain and Panama.
• Document, Back up all configurations, and monitor network.
• Secure network and VoIP servers using IDS (snort) and firewall tools (smoothwall)
• Set up linux based servers for maximum performance. Create shell scripts to backup data as well as enforce security policies.
• Train rest of the team.


Network Technician (3 months contract)
[February 2004-April 2004]
GBM International, Managua, Nicaragua www.gbm.net

• Worked as part of a team designing, implementing and configuring TCP/IP networks, domains, DNS, active directory and DHCP server in Windows Server 2003.
• General Desktop Support, Hardware installations, upgrades, user account administration and support under stringent deadlines in a fast-paced 24x7 environment.
• Hardware Troubleshooting, physical network installation.

Certifications
CCNA
CCVP



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