OBJECTIVE:

Sr. Unix Linux Systems Engineer / Sr. HPC Engineer / Sr. Storage Engineer

PROFILE:

• 16 years System Administration experience supporting 24/7 production environments with SAN/ NAS: HP - UX(10.x, 11.x) on HP9000(K380, N4000, rp54xx, rp3440, rp4440), HP9000 Superdome; Solaris 7/8/9/10 on SunFire v24x, v440, v480, v880, E4500; storage products including HP EVA5000, XP512 Disk Array, NetApp FAS9xx/30xx/32xx, Isilon X200, DDN 12K, Data Domain D580, Sun storage 7410, Bluearc, Coraid, NexSan, HP/ADIC/Overland Tape Libraries, HP Data Protector, Legato/Networker.
• 13 years demonstrated experience in Linux(Redhat Enterprise Linux 3/4/5/6, CentOS, Scientific Linux, Debian, Ubuntu, SUSE 7.3/8/9). Working knowledge of VMware GSX/ESX/ESXi, vSphere 4/5.
• 7 years High Performance Computing(HPC) clustering experience with Sun Grid Engine(SGE), Son of Grid Engine, Scyld ClusterWare, GPFS, InfiniBand and 10GigE; 9 years High Availability(HA) clustering experience with HP MC/Service Guard, Veritas Cluster Server, Red Hat Cluster Suite/HA.
• 4 years of hands-on DBA experience with Oracle(8i,9i,10g,11g, RAC) in multi-platform environments (HP-UX, Linux, Solaris, Windows NT/2000).
• Extensive administration skill in DNS, NIS, LDAP, NFS, CIFS, Syslog, Cisco/HP/Brocade switches.
• 8 years experience supporting US federal government agency. Strengths in Unix/Linux Security, hardening, system forensics and auditing. Good understanding of ITIL, COBIT, NIST, FISMA, CIS.
• Proficiency in UNIX/Linux Shell scripting(Korn, Bourne, Bash, Csh), Perl, C/C++ programming.
• Certifications: Master's Degree in Computer Science, Computer Security and Information Assurance Graduate Certificate, RHCE(Red Hat Certified Engineer), VMware Certified Professional(VCP5), CSA HP-UX(HP Certified System Administrator: HP-UX), GCUX(GIAC Certified Unix/Linux Security Administrator), SCSA(Sun Certified System Administrator), SCSECA(Sun Certified Security Administrator), GCFA(GIAC Certified Forensics Analyst), OCP(Oracle 8i), MCSE, MCDBA, CNE.
• Strong analytical, problem-solving, motivational and interpersonal skills. Ability to work effectively on multiple simultaneous tasks within fast paced, team oriented environment.

TECHNICAL SKILLS:

HP: UX(10.x, 11.x), Linux(Redhat RHEL, CentOS, SUSE), Solaris 7/8/9/10, AIX

Storage: HP EVA5000, HSG80, XP512, MSL6000, ADIC Scalar, Overland VTL, Brocade NetApp, Isilon, DDN, NexSan, Data Domain, Bluearc, Coraid, Sun 7410, Infiniband

Networking: Cisco IOS, 35xx/65xx switches, 17xx/26xx routers, PIX/ASA55xx; F5 Big-IP HP Procurve 54xx switches; Brocade SilkWorm; QLogic; Bluecat Adonis DNS DHCP, DNS, NIS, LDAP, NFS, NTP, Syslog, FTP, SNMP, VLAN, iSCSI, FCoE

Admin software: HP OpenView, Data Protector/Command View EVA, MC/ServiceGuard, SGEPuppet, Cfengine, BigFix, Nagios, Legato/Networker, Netbackup, CommVault

RDBMS: Oracle v8i,9i,10g,11g, 10g RAC, MSSQL Server 7.0/2000, MySQL, Postgres

Unix Security: NIST/CIS, AIDE, Nessus, rootkits, Portsentry, nmap, OS fingerprinting

Languages: Unix Shell, Perl, C/C++, SQL, PL/SQL, JAVA, JSP, ASP, XML, HTML

App/Web Servers: Apache, Oracle9iAS, Oracle 10g, BEA WebLogic/Tuxedo, Tomcat, Websphere

PROFESSIONAL EXPERIENCE:

Sr. Linux HPC Engineer

Confidential, Bethesda, MD

Responsibilities:

• Maintain 49-node, 556-core High Performance Computing(HPC) cluster, with SGE, GPFS, Rocks, DDN SFA12K-40, Mellanox InfiniBand.
• Design and build 66-node, 1088-core new HPC cluster, with Moab HPC suite, xcat, Puppet.
• Support 100+ Linux(RHEL5/6) servers running LDAP, Samba, NFS, Zenoss, Nagios, Apache, Tomcat, JBoss, Redhat Satellite, Mediawiki, Drupal, Splunk, Oracle and MySQL.
• Maintain system configurations with Puppet and Git.
• Deploy Aspera services for high-speed data transfer. Support 3D Print Exchange(3dprint. Confidential .gov).

Sr. System Administrator

Confidential, Bethesda, MD

Responsibilities:

• Maintained, secured systems at four data centers(CIT-12A, 2DEM, TTDC, NCTT): Red Hat Enterprise Linux 5/6, CentOS 5/6, SL6, Solaris 9/10 servers; SunRay server and VMWare ESX/ESXi 4/5 servers.
• Designed, built, and maintained High Performance Computing(HPC) clusters(630+ CPU cores) for genome research and DNA sequencing, with Sun Grid Engine(SGE), Penguin Computing Scyld ClusterWare, and Lustre. Monitor clusters with Ganglia monitoring system, and other systems with Nagios, Xymon.
• Maintained Web servers, database servers and application servers, with LAMP, XAMPP, Apache, Tomcat, MySQL, Postgresql, Drupal(Aegir, Open Atrium), Mediawiki, JIRA, Confluence and Splunk.
• Managed system configurations and security with Cfengine 2/3. Completed major data center relocation.
• Maintained storage systems, backup and recovery with multiple vendors products at four sites: Netapp FAS 3040/3050/9401 , Isilon X200, Data Domain DD580/890, NexSan SATABeast, Bluearc Mercury, Sun storage 7410, Coraid; EMC Networker 7.x, CommVault Simpana 9, Atempo Live Backup, NDMP.
• Built software packages from source codes. Maintain Perl, Python, R modules and Ruby Gems.
• Implemented smart card/PIV authentication on Linux(Redhat, Debian, Ubuntu, etc.) and Solaris.

Sr. System Administrator

Confidential, Bethesda, MD

Responsibilities:

• Maintained, secured large-scale Solaris 9/10, Red Hat Enterprise Linux 4/5 for 6 branches.
• Maintained and monitored HPC cluster with Sun Grid Engine(SGE) on Linux systems.
• Maintained DNS(5400 records), DNSSEC on BIND and Bluecat Adonis; NIS, FTP of Confidential /NLM.
• Resolved support tickets in Unix, Security, Storage and Remote Access queues for 6 branches.
• Identified security vulnerabilities on servers and appliances that were using Unix/Linux platforms. Developed and tested solutions to various security-related issues. Conducted comparative analysis of existing templates and risk models against the proposed NIST, FISMA and CIS standards on Unix/Linux. Performed vulnerability scan, assessment and penetration testing.
• Designed and implemented backup strategy and recovery plan with Legato NetWorker(v7.x), scheduled backup jobs with ADIC & Overland jukebox, VTL. Troubleshot backup related issues.
• Maintained NetApp FAS960, FAS3050, R200, Overland REO9K, NEO8K over SAN, F5 Big-IP.
• Designed and implemented directory service, integrating Unix/Linux LDAP and Windows Active Directory. Implemented NIS and Legato Networker migration from Solaris to Linux.
• Automated system management tasks with Perl/Shell scripts. Maintained Web servers with LAMP stack
• Maintained centralized syslog with LogLogic appliance and patch management with BigFix 7.x/8.0.
• Implemented and controlled remote access, with SSH tunneling, RSA SecurID, RADIUS.

System Administrator

Confidential

Responsibilities:

• Maintained servers for development and production environments: 20 HP9000 servers running HP-UX 11.x, 17 ProLiant blades servers running Red Hat Enterprise Linux 3/4, and blades running VMware ESX. Provided 24/7 on-call support for system related problems/issues.
• Maintained HP SAN environment: two EVA5000 and one HSG80, with SAM(Storage Area Management), Command View EVA, Business Copy EVA, Secure Path. Create Vdisk/LUN and present it to the server, upgrade firmware and management tools.
• Developed, followed, and implemented security policies, strategies, standards and procedures.
• Developed hardening scripts for Unix systems regarding security compliance and best practices.
• Performed research on system hardening technologies, tools and vulnerability prevention and detection, design and implement security architecture, and upgrade products and patches.
• Designed and implemented backup strategy and recovery plan with HP Data Protector and Ignite-UX, maintained tape libraries MSL6000 at different locations.
• Assessed, implemented and documented system level requirements, through Change Management processes, by using Incident Monitor 24-7 (ITIL compatible product). Prepared documents for risk assessment, implementation plan, back-out plan, standard change and emergency change.
• Performed required installation, configuration and maintenance of all system components /services: SSH, LDAP, NFS, DNS, Samba, WU-FTPD, vsftpd, SMTP, POP, IMAP, LVM, OnlineJFS.
• Wrote Shell scripts to monitor system resources usage and system/application incidents, and automate procedures with Cron jobs and AppWorx.
• Maintained Configuration Management Database for all HP-UX/Linux related hardware and software. Maintained kernel, firmware, services and applications at the same patch levels.
• Assisted in problem/incident determination and resolution, by continued monitoring with system tools and scripting, evaluation of system logs, and Cause and Effect analysis.
• Recommended and implemented performance enhancement solutions, based on historical trending statistics, with tools like SAR, Glance+, and scripting as well.

Oracle DBA

Confidential

Responsibilities:

• Provided DBA support for development team on Solaris 8/9, HP-UX, SUSE Linux, Windows2000.
• Focus on Performance tuning - instances, applications (6i forms and reports), SQL statements.
• Analyzed performance of OCA/ODBC within different database source(Oracle, MS SQL Server).
• Wrote Perl/Shell scripts for regular maintenance and task automation.

System Administrator & Oracle DBA

Confidential

Responsibilities:

• Maintained HP9000 servers (K380, L1000, N4000), HP 9000 Superdome, Sun Enterprise servers; HP SAN: HP SureStore XP256 Disk Arrays, and HP SureStore E Ultrium Library 4/40.
• Accomplished HP-UX(10.x,11.x), Solaris(7/8), Linux, Windows routine administrative tasks: configured, patched, system monitoring, tuning, capacity management, troubleshoot, network services administration and ensure system security. Maintained DNS, NIS, NFS, FTP services.
• Implemented high level availability by clustering HP9000 hosts with HP MC/ServiceGuard, designed system switch plan by writing Shell scripts.
• Wrote UNIX Shell scripts to automate tasks such as resource monitoring, data synchronization.
• Accomplished Oracle routine administrative tasks in multi-platform environments: HP-UX, Linux, Solaris, Windows NT/2000, running on HP9000 Servers, HP NetServers and Sun E250 Servers.
• Managed Oracle with Oracle Enterprise Manager, Management Packs and other third-party DBA tools ( Confidential ), as well as wrote special applications with Visual C++ to trace specific system status, identified and corrected potential problems before they had a noticeable impact.
• Designed and implemented backup strategy and disaster recovery plan, backup system data to Ultrium tape library or DSS tapes with HP Omniback.

Programmer

Confidential

Responsibilities:

• Accomplished 9 projects of developing database applications and networking applications, using Visual C++ / C++ Builder, PowerBuilder and Visual Basic.
• Designed, implemented and maintained databases in client/server, multi-platform environments.