SUMMARY:

• Solutions - oriented Red Hat RHEL Engineer/ Unix Admin/ Programmer with a proven track record of effective systems engineering demonstrated through 9+ years of experience in IT, computer programming, teaching, UNIX, voice over IP, and project management within the telecommunications industry.
• Extensive comprehensive experience as Linux RHEL administrator.
• Possess credential as a Cisco Certified Network Associate
• Extensive Database experience including DBA administration and optimizing complex SQL queries.
• Cisco CCNP candidate (2 tests due for completion).
• Possess credential as a Linux Professional (LPI 47593)
• Exceptional programming skills within a UNIX environment.
• Broad knowledge and success in a software engineering development environment.
• LAMP stack programming demonstrable experience, including heavy Java programming and deployment.
• Leading experience in a support and development environment.
• Foreign language proficiency in Spanish.

CORE COMPETENCIES:

• Networking (TCP/IP)
• UNIX / LINUX
• Programming
• Voice over IP (SIP, H323)
• Telephony
• Databases

TECHNICAL SKILLS:

Platforms: Linux, Solaris, AIX, FreeBSD, SCO, Cisco routers, Cisco Call Manager, VoIP gateways/gatekeepers, TGBM Softswitch, Talking SIP Softswitch, Mind CTI Softswitch, Proprietary RealTime Monitoring VoIP Tools, Confidential STX/NTS Tandem Switch, experience customizing VOCAL libraries, ASN.1 Porta One softswitch., Asterisk PBX., IPX, Novell, Lantastic, OSX, Entice, Portabilling. RAID 5, IBM, Dell, single and multiple processors. Windows in all flavors inluding2K3/2K8. RedHat, Centos, Suse, Ubuntu Freeswitch, Opensip. RHEL 4-6

Languages: C (11 years), Perl (2 years), PHP (5 years), C++ (6 mo), Unix Shell S.cript (7 years), XML, HTML, javascript, actionscript, JAVA (7+ years),SQL (6 years), ESQL/C PYTHON ERLANG Ruby.

Tools: /Protocols:: Rational ClearCase, CVS, IPX, TCP/IP, H.323, RTP, RTCP, Apache, eAccelerator, SNMP, SendMail, Radius, DHCP, GIT, DNS, NAT, IPSEC, IKE, ASN.1 Freeswitch, Git, Puppet, Chef.

Databases: PostgreSQL, Informix, MySQL, MS SQL Server, Oracle.

PROFESSIONAL EXPERIENCE:

Confidential, Mayfield Village, OH

Sr. Systems Engineer

Responsibilities:

• IT Systems Engineer Senior.
• Linux/Windows engineer part of Confidential group offering support to a huge IBM implementation of Confidential (Websphere 8.5, Infosphere, BPM) under Linux, running Red Hat Enterprise Linux 6 from installation to troubleshooting and patching.
• Internal Linux training to junior member of the team including Unix, networking and troubleshooting in preparation to present and future workload in the Linux arena.
• Scripting of version changes to monitor consistency of versions and patches of the entire IBM WebSphere suite.

Confidential

Linux Administrator

Responsibilities:

• Maintain production and Research Systems for Students, faculty and Scientists in a variety of configurations including Unix, Red Hat, Ubuntu and a wide spectrum of standards and configurations with heterogeneous systems like OpenMPI, OpenMP, Paradigm software, etc.
• Successfully installed and maintained complicated scientific software in cluster configuration for performance and speed.
• Installation, patches, security and networking assistance.

Confidential

Network Linux Administrator

Responsibilities:

• Cisco routers and switches with IOS and Nexus OS.
• Administration of development and production servers running Linux RHEL 5 & 6, including hardening, patch installation, monitoring and maintenance.
• Protocols extensibly utilized at an expert level: SSH, SCP, IPTABLES, FTP, SNMP, DNS, NFS, SMTP, HTTP, HTTPS, SSL, LDAP, Apache, Tomcat, JBOSS, kickstart.
• Updated the very old version of Tripwire Enterprise to the most current to be compliant with PCI requirements.
• Design, proposal, implementation, deployment, support monitoring and maintenance of all the Linux platforms in productions and development.
• Server security hardening, patch installation and upgrades and software and hardware maintenance.
• Deployment, operation and support of monitoring systems like SolarWinds, Nagios and Whats Up, including heavy scripting development for monitoring, deployment and automatization of tasks.
• SNMP and shell scripting for monitoring production environments.
• Automation of tasks and configuration via puppet and Chef management tools.
• AWS development for Amazon Glacier storage and Amazon Virtual services.
• Clients, vendors and third parties communication channels enjoyable handled.

Confidential

Systems engineer

Responsibilities:

• In charge of maintaining applications for the telecommunications industry, running on Linux Redhat RHEL 5.X and enterprise with Oracle 10 as the main database.
• This environment had over 100 Linux servers combining physical and virtual technologies.

Confidential

Security Operations Engineer

Responsibilities:

• Responsible for responding to denial of service alarms for customers around the globe and triggering the response mechanism to fight the malicious traffic with tools under the LAMP stack.

Confidential

Linux/ Unix Administrator

Responsibilities:

• Networking Unix and Linux design, implementation and support on a daily basis for Solaris, Linux servers with a wide range of networking architectures and systems.
• Linux RHEL 5 and 6, OpenSuse, Linux Suse Enterprise, Redhat, centos and windows support on a daily basis. Development of SNMP monitoring tools for Video Broadcasting systems.

Confidential

Systems Administrator | Network Engineer | Developer

Responsibilities:

• Support and maintenance of the technologic platform for processing of prepaid credit cards for the Latin American market with this financial institution, involving a cage NOC with Sun microsystem blade servers, IP PBX, SCO servers for Oracle/Informix database, EMC2 Clarion NAS administration and volume manager, MPLS and vpn communication links.
• Windows OS administration, Open source and LAMP implementation of monitoring tools for daily operations. LAN administration.Midleware JBOSS, TOMCAT, installation administration and maintanence. Administration of Linux RHEL servers with CEntOS, DEbian, Suse and Red Hat Linux distributions.
• Perl development of Asterisk modules.
• Intensive script development for task automatization.

Confidential

Network Architect/Linux Administrator

Responsibilities:

• Designed, developed and maintained services for the telecomm industry based in brainstorming of innovative ideas.
• Linux RHEL Administration of Asterisk /Freeswitch VoIP wholesale and IVR platform running on Redhat, Debian,centos, freebsd and Ubuntu with PHP, perl, Python, Ruby and shell scripting.
• Succesful adaptation of accelerating mechanisms for the php based billing syatem through OpCode Caching.
• Database administration for MySQL with replication as our billing database, perl development, NOC support and managing. LAN WAN links administration.
• Mac systems administration, LAMP development and maintenance of systems and services. Exp Analyzed Amazon Elastic cloud services EC2 to in corporate services to the business plan.Coordinated the integration of multiple Linux systems.
• VMWARE XEN virtualization.Freeswitch inception and prototyping of voip services.Switching and routing protocols widely used for all the telecommunications links.
• Support and maintenance of Mac platforms. Administration of Linux servers with CEntOS, DEbian, Suse Ubuntu and Red Hat Linux distributions.Intensive scripting for SNMP, shell, perl monitoring of the entire systems.
• Remote configuration management via Chef, puppet, Git and subversion.

Confidential

Sys Admin - Contractor

Responsibilities:

• Kept the Entice Sip/H323 softswith platform running in a smooth way and coordinated the LAMP development of a subsidiary website of the holding.
• IPT installation and daily troubleshooting for the internal company communications with high Quality os service.
• Coordinated overseas developers team with a centralized versioning system GIT based.
• Amazon EC2 services implementation.
• Linux Administrator for the company farm servers with email, webservers platforms.
• Validation scripts for billing system with actionscript and javascript.

Confidential

Network Engineer Linux RHEL - Contractor

Responsibilities:

• VoIP|data engineer in charge of the Network Operations Center for an international ITSP processing millions of calls per month in wholesale, retail, prepaid and postpaid with direct clients and resellers.
• In charge of the day to day operation of the PortaOne billing, /sip server platform with termination routes all over the world.
• Lead engineer in the development and improvement of the reseller’s web automated system a LAMP development. Integration of heterogeneous systems for daily operations, billing and administration. Linux RHEL 5 administration of over 50 servers on my own.
• Kept the systems running 24x7 with a substantial increase of clients and revenue. Additional platforms MAC OS and Windows servers. Additional platforms: windows servers and workstations. The retail portion of the business included commercial and residential clients with individual ip phones and call centers with Asterisk PBXs. Intensive IPT usage for customers around the globe. Lead developer of provisioning systems configuration management and deployment using tools like puppet, chef, cvs and Git.

Confidential

Responsibilities:

• Unix Software Engineer In charge of redesigning and recoding an application for loading software in UNIX and Linux RHEL servers for electromagnetic resonance units.
• Performed programming duties in Perl and C languages after software engineering reviewing a piece of code for installing software in magnetic resonance devices manufactured by GE. Also I helped to fix a C language system for adjusting the parameters in Magnetic coils for the same systems.
• Automation of tasks via scripting. Perl and JAVA programming and maintenance.

Confidential

Systems Engineer| Linux Administrator| LAMP Developer

Responsibilities:

• Developed and improved functionality in a distributed proprietary Point of Sale software attending concurrent sessions for stations spread along different cities.
• All the systems back end in Linux, with programs written in C.
• The farm of servers, in a mix of Windows, Solaris, Linux Redhat 4 to 5, (since 2 to Fedora and RHEL5) and freebsd (4, 5 & 7) where RAID 5 for most of them in both the central location and branches. Running in all kind of hardware since generic pcs to Sun and IBM AIX).
• Modernization of the version control system from CVS and subversion to GIT, Ruby and Python scripts for daily operation automation.
• VMWARE virtualization maintained.
• Perl billing system written with a non-centralized way of operation. Leader engineer in the integration of diverse systems for networking, wireless operation and administration.
• Hardware engineer in charge of assembly and integration to the network requirements. With corresponding hardware maintenance, troubleshooting and provisioning.
• Successful proposal and implementation of accelerating techniques like OpCode Caching eAccelerator for speeding point of sale transactions.
• Developed Purchase Orders in-house system with frontend in PHP, javascript and actionscript.

ISP Network Engineer | Network Engineer

Confidential

Responsibilities:

• Maintained a DSL providing network with 7 Cisco core routers for customers in NC and WV, and a Wireless network with a MCS Ericsson Switch.
• Monitoring and maintenance of BGP, OSPF protocols with our data providers.
• ISP maintenance routine support for over 10000 dialup customers with email, dsl and dialup access.
• Advanced routing and switching skill used to keep vpns,dsl, ISP provider, and dedicated| leased comm. links.
• NOC engineer in charge of the entire ISP unit of the business.
• Lead LAMP developer engineer for the in-house Point of Sale system, still running.
• JAVA Point of Sale retail operation backend design, development and maintenance.
• The customer base raised 446% from 1500 subscribers to 6700 over this period.
• Played a key role in an interdisciplinary development team through all stages of software engineer life cycle.
• Troubleshooting of SS7, CDMA and GSM equipment and integration to the network.
• Close to zero downtime for the ISP unit of the business using advanced switching and routing techniques.
• Developed an ASN.1 compliant real time CDR decoder for the Ericsson switching platform. The decoder, written in C, has multiple modes of operation and it has libraries level communication with a Postgres database.
• Supported and maintained a network with 40+ Linux/Solaris, windows servers. With RAID 5 for redundancy.
• Monitoring procedures implementation via Nagios and SolarWinds systems.
• Windows OS administration for servers, databases and desktops.
• In deep supporting role for the Mysql redundancy scheme master-slave in the Garuda softswitch telephone platform.
• Successful AIX migration to Linux RHEL.
• Started the migration to Asterisk PBX of the TDM internal phone system.
• Expert installation, deployment and maintenance of tens of Linux Red Hat servers throughout the East coast running Red Hat RHEL, fedora and Centos versions 3 to 6. For an ISP business Unit and Wireless carrier sold in a multimillion transaction. developed under my coordination and design and development.
• Proficient RHEL virtualization of severs for development and production environments.
• Implemented Puppet and Chef configuration management for deployment of software. Replacing Git, cvs and subversion.
• As main ISP engineer i had the daily responsibility of operating servers networking equipment with protocols as: BGP, OSPF, EIGRP, RIP, IGRP, SIP, SMTP, DNS, FTP, SSH, TELNET, web servers, routers and firewalls.
• Thanks to RHEL the critical billing system I helped building and maintained ran smoothly at every monthly cycle generating a revenue of over $400K month after month.

Confidential

Research & Development Engineer/Network Engineer

Responsibilities:

• Played a key role in developing state of the art Voice over IP applications.
• Open Source and LAMP Sytems architec and developer.
• Created VoIP and VoIP accounting solutions, which comprised of 40% of annual revenue.
• Integration of SS7 and ISUP devices with the VoIP network.
• VMWARE and XEN virtualization planning and implementation.
• Solarwinds monitoring platform conception, installation, operation and support.
• Linux Administration RHEL for over a dozen servers with Red Hat, Fedora, Slackware and Debian Linus distributions.
• Reduced risks associated with lost accounting records for National Telecommunications Company of Colombia through the development of customized applications, most of them with back end in C for speed and security purposes.
• Conceptualized and launched a prepaid calling card platform for VoIP, which resulted in substantial increases in revenue.
• Directed administration activities for 3 web servers, 4 accounting servers, 3 VoIP servers, and 5 Cisco gateways, and all kind of windows stations/servers, which reduced downtime due to functionality issues.
• Lead and implemented the redundancy policies for hard drives RAID and for the main database.
• Design and implementation of innovative tools ( Python,Ruby,Perl) for the voice over IP industry.
• AIX financial and database application maintenance and support.
• Cisco CUCM, Call Manager and Cisco unity modules for added services in our platform.
• IPT deployment and maintenance worldwide.
• Windows OS administration for servers, databases and desktops.
• Main NOC engineer, supporting the smooth technical operation worldwide 24x7 for VOIP gateways, softswitches, CCM and Asterisk Virtual PBXs, ip phones, call centers and resellers.
• Successfully Implemented Quality of service QOS for improvement of voice routes over data network.
• Software deployment via Git, subversion, puppet and Chef.
• Lead architech of a global SNMP monitoring platform for hundreds of clients around the world.
• Network & Linux Engineer Administrator
• Daily operations and supervision of dozens of productions servers running RHEL 5.x distributed around the globe for VOIP services retail and wholesale.
• Besides the VOIP SIP protocol I also worked effectively with H.323, IAX, HTTP, HTTPS, FTP, TELNET, SSSH, DNS, NFS and codecs.
• Senior Linux RHEL Engineer supporting tens of servers geographically disperse.
• Played a key role in evaluating switch performance and recommending new technologies for process improvement.
• Support for the Metro Ethernet link and equipment to our in-house data center With NOC support.
• Administered all aspects of Confidential -STX/NTS prepaid switching platform, which produced 10 million minutes in traffic across 3 million calling cards and allowed traffic between US, Mexico, and international prepaid calling cards.
• Spearheaded the transition between different platforms of 3 million prepaid calling cards database.
• Development of JAVA applications for day to day operations of the storage and database portion of the calling cards retail business.
• Augmented programs in an effort to reduce manual errors and streamline processes.
• Developed an SS7 Signaling Traffic Analyzer to troubleshoot signaling traces between telephone centrals.
• Led the partial migration from TDM to Voice over IP.