PROFESSIONAL EXPERIENCE:

SR. LINUX SYSTEMS ADMINISTRATOR

Confidential, Annapolis, MD

Responsibilities:

• Worked with Developers, Flight Coordinators, Troubleshooting various proxy and tunnel systems.
• Tracked and resolved issues with variety of tools like JIRA, Bugzilla, Feedback Tracker Outlook Tasks, etc.
• Managed a variety of custom user access systems for Company Staff and Customers.
• Deployed Monitoring console for Developers and Quality Assurance.
• Wrote Requirement Approach Testing (RAT) Documents, Documentation for deployment of systems, As Build Microsoft Word and Wiki Documents.
• As a SA, used host level firewall, network firewall to improve the network/hosts security.
• Worked on deployment of Centralized user authentication system, using FreeIPA/LDAP/Identity Management System running on RHEL 7.
• Deployed physical servers (Drupal) and virtual system in the migration from Arch Linux to CentOS/RHEL 6 and 7 using Chef Automation.
• Learned Ruby Scripting Language, writing Chef Cookbook Recipes for CentOS system deployments.

NETWORK AUTOMATION ENGINEER

Confidential, Herndon, VA

Responsibilities:

• Supported a 45,000 device Customer facing Multiple Core Opsware/HP Network Automation installation with Oracle Database. Resolved tickets involving among many other driver issues, policies, access control, policies, etc.
• Configured HP NA Satellite Network after recent migration to v10
• Configured and installed SSL Certificates for migrated HP NA Cores.
• HP NA API Scripting with Perl and HP NA Proxy.

LEAD SYSTEMS ENGINEER

Confidential, Woodlawn, MD

Responsibilities:

• Deploy and maintain Red Hat Enterprise Linux (RHEL) 5, 6, 7, LVM, Sendmail, OpenSSH, OpenSSL, NFS, Automount, SELinux, WebDAV, Apache, XYMon/Hobbit/BigBrother.
• Maintain and upgrade VMware ESXi 5, HP Custom, Snapshots, Virtual Appliances.
• Use Windows 7, VMware VSphere Client, Outlook, Link Messenger, Putty/SSH.
• Develop and maintain a network discovery application which scanned network on daily bacis and updated HP Network Automation (HPNA/Opsware) CISCO device inventory written in BASH with elements of embedded Expect, HPNA Perl API, TACACS/ACS/AAA Authentication.
• Automate emailing of daily and weekly reports to customer also written in HPNA Perl API.
• Provide support to group of elite network engineers known as Life Cycle Engineers (LCEs), create Expect template scripts for LCEs used to make network - wide configuration changes in CISCO devices.
• Deploy a shared repository of CISCO configurations used by Dedicated Network Operations Center (DNOC) Network Engineers to upgrade to a new dual carrier data network. Repository use replicated storage with GlusterFS across multiple locations.
• Set up, configure and maintain IBM Netcool/OMNIBus, SNMP Writer Gateway, IBM Netcool/Impact Alarm Enrichment.
• Maintain and updated HP Network Automation/Opsware for CISCO network device inventory.
• Made use of Configuration Management Tool Chef & Puppet for automation.
• Deploy and maintain endpoint system for carrier network performance data for the customer retrieve from.
• Set up and maintain open source application for monitoring Confidential systems use XYMon/Hobbit/BigBrother with customized client/server tests, Amanda Storage Backup, ZRM MySQL Backup, Home NFS/Automount, Storage Replication with GlusterFS.
• Work with HP Proliant DL380 G7 Servers, RAID10/RAID5, HPACUCLI RAID management, Intergrated Light Out (iLO) Web Console.
• Develop, document and execute a hardware maintenance procedures to dispatch technicians to secured data center facilities in multiple locations.
• Work with a team of Systems Engineers, participate in on-call rotation, supporting Confidential core IT systems infrastructure.
• Deploy development Solaris 5.10 with with ZFS and Zones.

LINUX SYSTEMS ADMINISTRATOR

Confidential, Hanover, MD

Responsibilities:

• Responsible for day to day administration of production and development systems over SSH, running Red Hat Enterprise Linux, CentOS and Fedora in a collocation facility and development environment, both physical and virtual.
• Configured, deployed and maintained a wide variety of Linux open source applications, from standard and extended repositories, source RPM and source tar ball archives.
• Configured, deployed, maintained security on various levels, regular Linux/Unix Security, user level, SELinux, Firewall, network and application levels.
• Deployed VMware Server/Player/Workstation In development and ESXi production environment.
• Developed test systems using RHEL/Fedora/CentOS/libvirt/QEMU/KVM/Xen/RHEV/oVirt Virtualization Environments.
• Used Oracle VM VirtualBox and very limited Oracle VM Server in development.
• Developed, configured, deployed and maintained automation and monitoring systems with Bash and Perl Scripting. developed, deployed, configured and maintained RHEL/Apache/PHP/MySQL System by installing Linux, Apache with PHP and MySQL from the preconfigured Linux repository; change Apache configuration when needed;
• Deployed eZPublish Content Management from scratch running on Apache PHP, MySQL.
• Implemented a series of regular expression with Apache mod rewrite to translate URLs from the previously used to the new content management systems.
• Configured and administered Linux IPTables Firewalls, using configuration tools and manually.
• Configured, deployed and administered SELinux, Mandatory Access Control System.
• Developed, configured, deployed and administered Logical Volume Management System, both for shared storage and virtual guest disks in libvirt/KVM development environment. Device Mapper allows for consistent logical volume naming across all systems using particular shared storage LUN
• Developed, configured, deployed and administered Red Hat Cluster Suite, AIS, Corosync, Heartbeat, High Avalability in development and production environments.
• Developed, configured and maintained network configuration of multi-interface, multi-homed, aliased, bridged, bonded, routed networks under Linux.
• Developed, configured and maintained mail application using Sendmail, Spamassassin, DKIM, DNSBL, SPFv1, ClamAV.
• Developed, configured, deployed, maintained Web Servers & Drupal Servers with Apache, PHP, mod rewrite, Python, Django, Perl, CGI systems.
• Developed, configured, deployed, maintained MySQL Replication and Red Hat Cluster Suite.
• Configured and deployed RAID1/5 Arrays on servers, directly attached and network storage arrays.
• Configured and deployed iSCSI Target Storage systems, physical and virtual.
• Researched and developed various automation technologies using CFEngine and Puppet.
• Researched, configured and developed Identity Management systems using IPA Directory/UNIX Domain service.
• Recommended hardware, software, wrote proposals for projects.
• Used Visio to diagram existing and proposed systems.

PC/NETWORK TECHNICIAN

Confidential, Baltimore, MD

Responsibilities:

• Deploy and support PC/Windows/UNIX/Network Installation and SOHO/WIFI/LAN/Internet connections
• Design and implement, office computer system for sharing office resources like storage, printers, scanners on a LAN, using UNIX/Linux, CIFS/Samba3/LDAP/Kerberos, OpenLDAP/TLS/SSL, SASL, MySQL and MS Windows 95/98/TN/2000/XP/2003/Vista Servers and Workstations for private companies and small businesses.
• Install and maintain Wireless Distribution Systems, using open source firmware with mostly Linksys and other Broadcom wireless routers.
• Recovered “bricked” routers after unsuccessful firmware updates using JTAG cables
• Produced and edited multimedia MP3/WMA/WAV/M4A/AU/AVI/MOV, audio, using various open source software, record, edit and insert ID3v1/ID3v2/APEv2

DATA RECOVERY ENGINEER

Confidential, Bel Air, MD

Responsibilities:

• Recovered data from broken, failed hard drives, and forensics using Linux/UNIX/MacOS X tools
• Design and deployment of backup system
• Repairing Apple/Macintosh equipment under the supervision of an Apple/Macintosh Certified Technician and setting up MacOS X Workstation/Server systems
• Designed websites using SuSE Linux/Apache/PHP/MySQL

LINUX SYSTEMS ENGINEER

Confidential, Bethesda, MD

Responsibilities:

• Administered an enterprise network for a content management company, involving various technologies including Linux/ OpenBSD/ FreeBSD/ SunOS, Cisco/ NAT/ VPN/ Firewall/ DHCP, BIND/ DNS, Apache/ PHP/ MySQL, Qmail/ Sendmail/ POP/IMAP, YP/NIS/NFS, NetBIOS/Samba, RAID, etc.

COMPUTER LAB ADMINISTRATOR

Confidential, New York City, NY

Responsibilities:

• Helped students to solve their challenges in the computer lab.
• Administered an enterprise LAN/WAN networks with mixed OS2/NT/NOVEL/Linux/Mainframe environments.
• Developed and implemented Windows workstation restore mechanisms, using Ghost and PartitionMagic software.
• Became proficient in Linux Administration, Installation of various Linux Distributions and network services, including DNS/ BIND, SMTP/ Sendmail, POP3/ IMAP, HTTP/ Apache/ SSL, YP/ NIS/ NIS+, DHCP, NetBIOS/ Samba, IP-MASQ/ NAT, VPN/Firewall, etc.
• Obtained patches from the Internet, apply them, configure and recompile the Linux kernel.
• Also experimented with Linux/IPv6, configured 6-over-4 tunnels, participated in 6BONE project.