OBJECTIVE

• Seeking a fulfilling position where my robust technical knowledge, exceptional work ethics and experience in design, deployment and support of IT Infrastructure can be optimally utilized, in order to contribute a tangible quota towards the overall success of the business.

SUMMARY

• Results - oriented IT Professional with over ten years progressive experience deploying, supporting and administering a wide range of infrastructure components in enterprise network environments.
• Broad technical background includes experience implementing and supporting software and hardware products such as Red Hat Enterprise Linux (RHEL), CentOS Linux, Red Hat Satellite Server, Ansible, Puppet, Splunk Enterprise, AWS Cloud Technologies, Commvault Simpana backup software, VMware ESXi Server, Microsoft Windows Server 2003/2008/2012 , Nimble/EMC Storage Area Network, Netgear NAS, HP Proliant DL/ML Series Servers, Dell PowerEdge Servers, Juniper EX Series Switches, Cisco Catalyst Switches, F5 Load Balancers etc.
• Hands-on experience with protocols, tools and network services including RSYNC, NFS, LDAP, CSSH, SCP, MobaXterm, Putty, Kickstart, WINSCP, SCP, TAR, NETSTAT, PS Tools, Kiwi CatTools, Tunnelier, DNS, DHCP, WINS etc.

PROFESSIONAL EXPERIENCE

Confidential, College Park, MD

Senior Linux Systems Administrator

Responsibilities:

• Possess considerable experience in installation, deployment, performance monitoring, tuning and troubleshooting of both bare-metal and virtual (vmware and KVM-based) Red Hat Enterprise Linux (RHEL 6, 7 & 8) servers.
• Performs enterprise-wide systems administration tasks on systems running various variants of Linux Operating System using Puppet and ansible automation tools.
• Compiles and deploys custom-built packages to servers in various environments.
• Possesses extensive experience in the working principles of network and web-related protocols e.g. utilizes nsupdate utility to make dynamic updates to DNS zone records for various reasons, such as application failover between different sites.
• Secures websites running as virtual hosts on apache web servers by installing and configuring public CA-signed SSL certificates on the hosting servers.
• Automates various systems administration tasks by writing and deploying bash scripts.
• Remediates identified vulnerabilities by patching systems that exists in various environments on schedule and in accordance with respective departmental guidelines.
• Utilizes Subversion (SVN) and Gitlab version control systems for code management.
• Troubleshoots technical issues by using Splunk to analyze system logs.
• Administers public key authentication using SSL certificates by generating and/or processing Certificate Signing Requests (CSR) generated by users.
• Troubleshoots and resolves technical and operational issues as assigned from the ticketing system.
• Experienced in developing and maintaining SOPs (Standard Operating Procedure) documents for enterprise packages.
• Manages and supports various services e.g. EC2 instances, IAM users, EBS volumes in AWS cloud environment.

Confidential, Suitland MD

Linux Systems Administrator

Responsibilities:

• Installs and configures RHEL 6 & 7 servers on bare-metal and on virtual (Vmware and KVM) nodes by utilizing kickstart.
• Performs customized configurations of packages (e.g. apache, tomcat, vsftpd, subversion, trac etc.) and server resources (e.g. filesystem sizes, swap spaces etc.) on new server builds as need be.
• Automates configuration management of RHEL nodes using Puppet and ansible.
• Performs planning, development and implementation of server and package upgrades.
• Designed, configured and deployed automated patching and reboot of RHEL nodes using the Satellite Server, bash scripts and crontab.
• Remediates identified vulnerabilities in RHEL servers by patching and by making configuration changes as need be.
• Performs streamlined enterprise-wide Software Management by doing such things as deploying patches to enterprise systems that exist in various life cycle environments through Satellite Server 6.
• Creates and manages (removes, extends and relocates) file systems that are based on LVM (Logical Volume Management).
• Modifies BIND configuration files on-demand and resolves DNS-related network issues by manually making changes to DNS zone files.
• Performs systems performance monitoring using Nagios and implements tunning as need be.
• Supports and administers servers running RHEL OS by performing acts such as flashing firmware on system boards, increasing memory sizes, fixing broken raid volumes etc.
• Promptly responds to assigned tickets created by helpdesk and by users requesting help with various types of issues on RHEL servers.
• Experienced in managing and administering EMC vendor storage SAN using EMC PowerPath package.
• Experienced in the installation and configuration of LAMP stack.
• Creates new Vmware virtual servers running RHEL OS by cloning existing virtual servers.

Confidential, Baltimore MD

Linux Systems Administrator

Responsibilities:

• Installs, configures and deploys machines running Linux-based Operating Systems (OS) such as Red Hat Enterprise Linux (RHEL), Centos etc.
• Performs installation, customized configuration and update of packages on RPM-based Linux distributions.
• Installed configured and deployed LDAP (OpenLDAP) Directory Services Server for the corporate network.
• Administers, supports and manages Linux-based servers by performing periodic tasks that enhance performance of the systems and the packages that run on them, e.g. by scheduling periodic updates of systems and the packages.
• Experienced in the setup, configuration and management of iSCSI storage for Linux machines.
• Deployed and manages dynamic storage for corporate file server using Logical Volume Management (LVM) tool.
• Installed, configured and deployed IP-based virtual hosts on an Apache server, to enable it to host multiple websites, with each website having its own IP address.
• Diagnose and resolves problems affecting enterprise packages running on Linux Nix such as NFS server, Apache Web Server, SAMBA, Bind DNS server etc.
• Created and deployed Linux Kickstart server in order to automate and standardize the setup and deployment of new Linux servers.
• Troubleshoots and resolves issues affecting physical and virtual Linux-based machines and packages running on the machines by taking steps such as replacing identified malfunctioning hardware resources, modifying default system-based configuration settings etc.
• Utilizes a host of Unix-based tools and commands such as sar, ps, top, df, ethtool, netstat etc. in troubleshooting and fixing problematic Linux Nix machines.
• Provides users access to server resources provisioned on RHEL servers by doing such things as creating/modifying user accounts, granting users adequate permissions needed to access SAMBA shares, creation and management of groups etc.
• Ensures availability of infrastructure resources through the use of network management software (PRTG and Nagios) to monitor the resources, and promptly taking steps to fix alerted issues.
• Monitors and manages the enterprise backup system (Commvault Simpana).
• Performs Network engineering tasks such as installation and configuration of routers and switches as need be.

Confidential, Baltimore, MD

Systems/Network Administrator

Responsibilities:

• Provides administration and systems management support for enterprise applications and services such as Microsoft Windows Active Directory, Microsoft Exchange Server 2010, Symantec Endpoint Protection, Windows Server Operating Systems (OS), DNS, DHCP, WINS etc., in a distributed network environment.
• Builds, configures, deploys and manages virtual and physical servers running Microsoft OS.
• Prepares and configures new/replacement network devices including switches and routers, in the process of making them ready for the production environment.
• Ensures availability and optimal service rendering of network infrastructure components by tracking the components’ status and their significant system events through e-mail notifications from the network management system (PRTG), and promptly taking appropriate steps to resolve issues.
• Troubleshoots, analyzes and resolves clients’ Local Area Network (LAN), Wide Area Network (WAN) and Wireless Local Area Network (WLAN) network connectivity issues.
• Performs backup administration tasks such as monitoring backup jobs, restoring documents for users’ on-demand, analyzing job logs, taking necessary steps to resolve issues etc., using Commvault Simpana.
• Manages and supports networking gear including Cisco Catalyst switches in a stack setup, Cisco Pix firewalls, Juniper Switches and HP FlexFabric switches by doing such things as modifying their configuration files as need warrants to configure such things as Link Aggregation Groups (LAG), Virtual LANS (VLANs), Switched Virtual Interface (SVI), Inter-Vlan routing, adding/removing static routes etc.
• Manages and supports VMware VCenter Cluster infrastructure with hosts servers running ESXi 5.5, using vSphere client and web client.
• Writes and maintains minor scripts to automate various tasks on the network.
• Creates and administers FTP/SFTP accounts for corporate clients using Winsshd Server.
• Acts as level 2/3 support for users.

Confidential, Baltimore, MD

IT Tech Support Specialist

Responsibilities:

• Attending to local and remote users’ help desk calls including PC hardware and software issues, new user set-up, passwords resets, software installations, printing problems, telephone setup etc.
• Creates and deploys PC images as needed using Symantec GhostCast Server.
• Configures desk phones and voicemail boxes for users using Avaya Definity PBX and Audix voicemail systems.
• Configures SMTP and POP services on company-issued phones to enable access to corporate emails.
• Designed the implementation plan for Windows Server Update Services (WSUS) on the enterprise network. Also manages it.
• Troubleshooting and resolving various network (LAN and WAN) traffic issues e.g. inbound and outbound email transmission, remote-access VPN tunnels, SSL VPN etc.

Confidential, Glen Burnie, MD

Contractual Desktop Support Tech

Responsibilities:

• Adding memory modules to PCs.
• Preparing PCs by transferring images locally.
• Using customized program to join PCs to the directory service.
• Backing up and restoring users’ data using DMU utility.
• Configuring new boxes for users by installing their printers and granting them necessary local rights.

Confidential, Baltimore, MD

IT Tech Support Engineer

Responsibilities:

• Preparing of systems by deploying ghost images from the ghost explorer server
• Setting up new PCs for users by installing peripherals such as local printers, network printers, TV cards and special applications.
• Configuring new systems for users during new PCs rollout by ensuring access to their roaming profiles and their home folders.
• Ensuring users who have local profiles have access to it on their new machines.
• Copying over old domain local profiles to the new domain local profiles for users who have been migrated to a new domain but are retaining their old machines.
• Installation and configuration of Lotus Notes R5, Microsoft Office Outlook and Windows XP for Pro-image.
• Initial bulk mail to users who are to be migrated to a new domain on a particular day.
• Successful migration notice to users who have been migrated over to the new domain.

Confidential, Lagos

End User Support Engineer

Responsibilities:

• Configuration of systems to join a Microsoft Windows 2000 Active Directory domain
• Creation and management of user accounts and groups
• Use of Dameware Mini-Remote and SMS to log-on remotely to a user’s PC for support purposes
• Tracking and resolving of PC Hardware problems
• Providing software maintenance services.
• Providing of back-end support services using VERITAS Backup Exec for Windows Server.