OBJECTIVE:

To join a progressive and innovative company .

SUMMARY:

• Over 15 years of very strong experience as Systems Administrator of Linux (Red Hat Enterprise 4.* - 6.*, Oracle Enterprise Linux, Centos), and Unix (OpenServer, Unixware, Sparc and Solaris) and Windows (7-10, 200*) servers.
• Strong experience in the configuration and maintenance of enterprise level servers: Oracle’s Exadata Clusters, HP Proliant (DL380 G5, G6, G7) Xeon (up to 24 CPUs) RAM 72 GB, Compaq Non-Stop Clusters, Dell Poweredge Servers, HP StorageWorks. Also have administered IBM's, Unisys , NCR and prototype servers from Intel.
• Excellent Systems Administration experience of complex computing environments in a Multiple-Thousands Multiple Data Centers, Data Redundant, High Performance 24/7 365 environment .
• Excellent experience troubleshooting all kinds of Linux (ILO) performance, security, networking and resources issues: performance optimization (top, netstat, nmap, tcpdump, sar, ps, etc), kernel parameters configuration , source code patching and daemons parameters configuration and troubleshooting, servers security (nmap, tcpdump, Iptables, protocols' wrappers configuration, SSH), Intrusion Prevention, Malware prevention and removal (Symantec's, BitDefender's, MacAfee's, etc).
• Very strong experienced in performing Root Cause Analysis in multi-layered environments that involve Applications, Databases, Middleware, Web, OS, Networking and Hardware
• Very strong experience in the Systems Administration, configuration and troubleshooting of Oracle’s High Performance, High Availability Self-contained Exadata Clusters (6) .
• Excellent experience with scripting in both Linux and Windows using Python, Bash and Expect.
• Some experience administering, configuring and integrating Puppet, Foreman, QIP and Hiera.
• Some experience with Hadoop and Cobbler administration .
• Strongly experienced with vmWware vCenter/vSphere and building, administering, troubleshooting, cloning and converting VMs.
• Strongly experienced with Enterprise level monitoring: Splunk, HP BAC, SiteScope, NewRelic, NetScout, OpenView.
• Strongly experienced with Atlassian's JIRA (Project and issues' tracking) and HP’s HPSM ticketing system.
• Strong experience troubleshooting Enterprise level applications such as Tomcat, Jboss and memcached.
• Very strong experience troubleshooting issues in the interaction between Linux, Java applications and DataBases (Oracle RAC and MySQL).
• Strong experience installing, configuring and administering Linux and Windows Web Servers (Apache, IIS).
• Strongly experienced in data management and data protection thru encryption, backup systems (Veritas NetBackup and Volume Manager) , Linux's LVM, SAN and RAID systems and users' access administration.
• Very experienced in troubleshooting Linux’s VAS issues and VAS/Active Directory issues.
• Strong configuration knowledge of networking wired/wireless devices: routers, switches, firewalls, bridges, access points (Cisco, Dlink, EtherLink, TrendNet). Strong knowledge of networking protocols: TCP/IP, HTTP, FTP, Telnet, SSH, SAMBA, NFS, DNS, DHCP, SNMP. Strong configuration and administration experience of Email servers (Qmail, SQWebMail) and Email protocols (SMTP, IMAP, POP).
• Strong experience installing and configuring MySQL, MSSQL Server, Visual FoxPro on top of Linux and Windows.
• Over 12 years of strong experience as Software Developer having used Python, PHP, C++, C#, Visual FoxPro, SQL, Bash, Awk on top of Linux, Unix and Windows operating systems.
• Extensive experience as client and server side web developer having used Python, Django, PHP, Drupal, HTML, CSS and JavaScript on Linux, Unix and Windows.
• Very experienced designing and programming for MySQL, SQL Server and Visual FoxPro databases (clients programs , server side Stored Procedures, SQL Queries). Heavily experienced in creating ETL programs from disparate data sources. Have used reporting tools extensively.
• Very experienced on implementing and programming HIPPA standards and defining and establishing disaster's prevention and mitigation procedures.
• Excellent abilities to work under pressure completing goals, projects and tasks on time and ahead of time .
• Excellent abilities for acquiring new knowledge and keeping myself updated on the newest computer technologies .
• Excellent abilities to troubleshoot complex computing environments with incomplete and contradictory information.
• Excellent abilities to work individually level and in teams. I have excellent communication skills.

TECHNICAL SKILLS:

Operating Systems: Linux (RedHat Enterprise Linux, Oracle Enterprise Linux, CentOS), Unix (OpenServer, UnixWare, SunOS, Solaris), Windows (XP, 200*, 7-10).

Languages: Python, PHP, C/C++, C#, SQL, JavaScript, jQuery, HTML, CSS, XML, Bash, Awk. Strong familiarity with Java . Familiarity with Ruby.

Web Servers and Frameworks: Apache, IIS, Django, Drupal, Tomcat, Jboss, ASP. Net. Familiarity with Plone.

Web Browser Programming: JavaScript, HTML, CSS, Jquery .

DNS Management: QIP Enterprise, BIND.

Email: Qmail, SQWebMail, SMTP, IMAP, POP.

Servers Performance: top, htop, sar, iostat.

Networking: Configuration, Server Routing (route, iptables), Bonding, Aliasing, statistics (ethertools, netstat, sar, tcdump), connectivity (nslookup, traceroute, arp, Cisco’s CDPR, nmap) TCP/IP, HTTP, FTP, Telnet, SSH, SAMBA, NFS, DNS, DHCP, SNMP, Routers, Switches, Bridges, Access Points. Brands Cisco, Dlink, EtherLink, ASUS, TrendNet.

Network Monitoring and Management: SpiceWorks .

Security: Anti-Malwares (SpamAssassin, Symantec's, BitDefender's, MacAfee's), PGP Encryption, PKI, Kerberos, Active Directory, LDAP, SSH, Iptables, nmap, tcpdump, WireShark, protocols' wrappers, VPN, tunneling.

Data Integrity and Protection: Veritas NetBackup and Volume Manager, Linux's LVM, Hitachi Enterprise SAN, RAID systems.

Database Systems: MySQL, MS SQL Server, Visual FoxPro. Strong familiarity with Oracle RAC RDBMS. Familiarity with PostgreSQL and Access.

No-SQL DBMS: Hadoop .

Virtualization: Vmware vSphere, vCenter and vBlock, Servers Cloning, Servers Templates creation, Servers P2V conversion, Xen.

Groups' Collaboration: EgroupWare, Atlassian’s JIRA .

Configuration Management: Puppet .

Provisioning Systems: Foreman (Puppet), Cobbler (Hadoop).

Systems Monitoring: Splunk, Sitescope, HP BAC, NewRelic, NetScout, OpenView .

Applications Monitoring: New Relic, HP BAC .

Authentication: Active Directory, VAS, LDAP, PKI .

Certificates Administration: Venafi, OpenSSL .

Ticketing System and Change Management: HPSM, JIRA .

Servers Patching and Upgrades Management: Red Hat's Satellite.

High Performance/High Availability Systems: Oracle's Exadata clusters.

EXPERIENCE:

Confidential

Sr. Systems Engineer

Responsibilities:

• Sr. Systems Administrator for Confidential ’s Group 14000+ Physical and Virtual Enterprise Class Clustered and Standalone Linux Servers and for several dozens of Enterprise Class Clustered and Standalone SUN/Solaris Servers in a Multi-Data Centers, Data Redundant, 24/7 365 availability computing environment. Participated in all aspects of the maintenance, patching, troubleshooting, configuration, migration and conversion of Enterprise Level,Clustered and Standalone Physical and Virtual Linux servers.
• Main Systems Administrator for 6 multi Million-dollars Enterprise Class High Performance/High Availability Oracle Exadata self contained clusters. Participated in all aspects of maintenance, patching, troubleshooting and configuration of Exadata's clusters compute nodes, storage nodes and inifiniband switches .
• I have participated in the 1 week, 24/7 on-call rotation up 2 weeks per month since joining Confidential .
• I have participated in many occasions as the Linux expert in the troubleshooting of day and evening outages of Enterprise Level Multi-Layered Applications (Customer Facing Applications, Middle-ware Programs, Back-end Applications and Data Base servers) .
• I have participated in many occasions as the Linux expert in the determination of the Root Cause(s) of complex issues in multi-layered environments . Excellent experience and results in performing Root Cause Analysis .
• Involved in the Systems Administration and troubleshooting of the Hadoop/Cobbler/Centos Linux environment .
• Involved in the Systems Administration of Confidential Global’s Linux/Puppet/Foreman/Hiera/QIP environment .
• Main Systems Administrator and troubleshooter for Seattle’s Aptimus Oracle/CentOS environment.
• Participated in all aspects of the building, kickstart, initial configuration and troubleshooting of clustered and standalone Linux physical virtual servers .
• Participated in all aspects of the special customization of clustered and standalone Linux physical and virtual servers.
• Wrote Bash, Python and Expect scripts that aided in the Systems Administration of thousands of Linux servers i.e. servers configuration retrieval, servers reconfiguration and troubleshooting, users accounts administration, Oracle ASM SAN disks modification, addition and removal, etc.

Confidential

Sr. Systems Administrator and Sr. Software Developer

Responsibilities:

• In charge of all aspects of Linux and Unix servers Systems Administration (around 70 Linux and 2 Unix Servers). Heavy expertise in installation, kernel configuration, file systems configuration, protocols configurations, performance increase and security. On-call 24/7, 365 days even on vacation days .
• Fixed severe issues in Linux and Unix Servers: OS configuration, capacity, networking, security, data (corruption), and performance. Debugged and fixed causes of recurrent soft and hard kernel panics.
• Traveled regularly to remote locations (Prescott, AZ, Nogales, AZ, Tucson, AZ) to fix Linux related issues (severe file system corruption, loss of configuration files, DHCP clients crashes).
• With the IT team (3 additional members), completed the installation of the new company's Eye Care Management and POS system (COS) on top of Linux (Red Hat). Linux servers and Linux desktops (Red Hat and Gnome) were deployed in Headquarters and in all the 65 remote locations and in the 2 Medical Centers.
• Migrated company's email servers from a third party hosting company to our own Linux servers (Red Hat). The cost of adding new accounts, space and features was becoming too expensive. The reliability of the email services were shaky at best. With Qmail on Linux (Red Hat) and all the necessary plug-ins I was able to create email systems that were almost free, completely secure, with almost unlimited capabilities and 100 % reliability. Patching the code of the MTA and its plug-ins rendered additional capabilities and security.
• Wrote Bash and Python scripts for Linux Email server to increase security, to scan and modify emails contents in real time traffic and to automate as much as possible Sys Admin tasks and to comply with HIPPA regulations.
• With the IT group transitioned the old and shaky company network into a Frame Relay network. Configured Cisco routers (2600 and 3600) and all kinds of switches. Collaborated with Qwest networks to fix any issues with the network. Increased security of the network thru modifications of routers configurations. Troubleshoot of all kinds of issues related to local networking.
• Thru the usage of massive storage devices (disks and tapes) attached to Linux servers (Red Hat and Mandriva) created a reliable enterprise-wide back up system for all Linux and Unixware servers ’ data and for many of the individual Windows PCs in the company. Wrote Bash and Python programs to backup and archive all kinds of data.
• Migrated Web servers from a third party hosting company to our own installations. Migrated public web sites from Unix to Linux (Centos 5) and Windows (2000, Asp Classic) to Windows (2008, Asp .Net) and troubleshooted all issues from the migration. Very good in porting web sites from Windows to Linux and vice-versa. Ported and troubleshooted code in public web sites so they could function in their new environment. Created new programs to replace non portable programs. Replaced and migrated web sites' expensive MS SQL Servers with MySQL servers. Chose new registrar and set up registrar's information (DNS, MX, Mail, FTP, etc., records).
• Migrated the most important but aging main Linux Server (Red Hat, COS) to new hardware while keeping the older Linux kernel (due to version restriction of the ABI libraries that allow FoxPro's OpenServer binaries to run on top of Linux). I researched, modified and patched C source codes of kernel, device drivers and libraries .
• Created the first and only Intranet web site for the whole company. The site evolved from being a site used exclusively by IT to a site where the personnel including all the remote locations can get the data and applications they need. The site is powered by HTML, Python and Java running on Apache on top of Linux (Mandriva).
• Tech. Support Escalation for all the other members to the IT group i.e. Last l ine of defense in IT.
• Debugged all custom made applications (insurance system, patients scheduling and follow up system, doctors scheduling system, billing system) running on Unix and Windows fixing massive amounts of issues that had been unresolved for years. In all, it took me about 2 years to fix the most urgent issues.
• Cleaned up insurance company's databases generating anew completely consistent data.
• Enhanced applications with new features: realistic ID cards generator, real-time invoices checking, personnel data access security protections and logging, improved doctors' scheduler, realistic-looking invoices generator, invoice encryption and password protecting.
• Created a number of applications designed to provide strategic information that the commercial applications were unable to provide: Patients Recalls, Patients Utilization, Employees Bonuses, Stores/Employees Sales, Plans Utilization, Groups Utilization, Plans/Members Censuses.
• Created HIPPA implementations: Hicfa 837 Generator, Full Hicfa 834 Processor.
• Created ETL programs for groups ETLs in order to process disparate data sources.
• Created applications and Stored Procedures to allow for inter-systems data imports/exports.
• Created a new and improved billing system that include improved invoices generators, groups invoices fusion, invoices encryption and validated automatic invoices transmission.

Confidential

Sr. QA/Certifications Engineer and Sr. Systems Administrator

Responsibilities:

• Administered 1 Test Unixware Non-Stop Cluster (Compaq), 25 Confidential Unixware test enterprise servers (hardware: Compaq, Compaq NonStop Clusters, IBM, Unisys, NCR), and some 80 non- Confidential test enterprise servers (Solaris, HP-UX and AIX). Installed Operating Systems, configured/troubleshooted filesystems, configured/troubleshooted networking protocols, modified kernel parameters, configured/troubleshooted RAID systems, configured/managed backup systems, configured Volume Managers, rebuilt and patched kernels and took care of any additional requirements requested by testing.
• In charge of setting up testing environments for both local and international testing groups. In charge of immediate response support for all local and international groups testing on those servers. On call 24/7, 365 days per year.

Confidential

Quality Assurance Testing Lead

Responsibilities:

• Lead 14 Confidential QA Engineers assigned to Oracle for QA testing in Oracle. Kept track of projects and progress. Got involved in specific testing when it was necessary.
• Coordinated closely with Confidential 's Headquarters and with Oracle's engineers to make sure that QA testing efforts were progressing as expected.
• Worked closely with Oracle's Patch Set, JDBC, JavaVM, EJB, SqlJ, RDBMS, Systems Administration and Logistics groups in order to help make Confidential 's collaboration with Oracle as successful as possible.
• Lead Confidential 's project to get Oracle certification for Unixware 7.1 OS and Oracle 8.1 RDBMS running on top of Confidential 's approved hardware (Compaq's, IBM, NCR, HP).
• Teamed with Compaq's Engineer to run the set of tests required to obtain the certification: regression, JDBC, JavaVM, EJB and SqlJ tests. Adjusted performance parameters in OS to be able to pass the tests: Kernel parameters, file system's parameters, networking parameters. In order to pass some of the tests it was necessary to patch the kernel and rebuild it.
• Completed certification on time which gave a substantial boost to the credibility of the company to be able to have a flagship product certified on time. The completion of the certification also gave Confidential bragging rights to claim that Confidential 's flagship product had passed the top RDBMS maker stringent testing and in consequence contributing to substantial sales' increases.
• Lead Confidential 's project to get Oracle certification for Unixware 7.1.1 OS and Oracle 8.1.5 RDBMS both running in Compaq's Non-Stop Clusters.
• Teamed with 2 Compaq's Engineers to setup cluster's environment and to run the set of tests required to obtain the certification: regression, JDBC, JavaVM, EJB and SqlJ tests. Adjusted performance parameters in OS to be able to pass the tests: kernel parameters, file system's parameters, networking parameters. Necessary code patches were applied to the kernel.
• Completed certification on time. That was the biggest certification effort in Confidential history and proved that the platform was ready to be used under the toughest performance requirements.
• Provided technical support for Confidential products being certified or tested to high-level international Confidential 's customers that only spoke Spanish. Answered technical questions from customers in Mexico, Colombia, Venezuela, Ecuador, Peru and Chile.