David Harracksingh Email & Phone Number

Supported Cloud VMs on IBM Cloud and Azure Running RHEL 7.x. Coordinated troubleshooting hosted environment with cloud infrastructure support.Resolved NIC configuration hardware restraints for bandwidth constraints found investing io and network restraints on servers running gfs2. Configure NSF well as SAN EMC Zones. Generate report for SOX compliance. Trouble shoot application go live. Implemented backup systems.

Migrated Linux Suse 12 to Suse 13 environment and upgraded system OS and Kernel to new hardware HP platform Configure Environments and package management system using autoyast. Tested APP and CID DB and application connection as well as configure services, account authentication and environment paths.

Hanover, Md, Us

Upgrading binaries and kernels to meet security and compliance standard on multi tear environments This includes RHEL 6.x and 7.x on HP Proliants G5 to G11 7, AIX 7.X on PPC HPUX 11.x on SuperdomesSolaris 10, 11 Was heavily involved with Sprint Communications CIS - Implementation Team. Heavily involved in Upgrade and patching to both their Linux and Unix Environments to meet current OS Release & Version on live multi HA Clustered infrastructure on both Physical as well as Virtualized environments. This includes kernel upgrades as well as binary/software upgrades and patches to all levels from development to production. HPSA, HPOO, Ansible, Vrealize implementation for there CD/CI infrastructure was used.

Jacksonville, Florida, Us

Build out RedHat 6.x and 7.x on physical and RHEL Openstack 5.x along with VMware 5.x for virtual server environments. Standard Practice was Agile; plus and included Requirement Gathering, Peer Reviewing for Infrastructure Implementations, Custom Configuration, VM Cloning, Security and Vulnerability and finally User Acceptance Test. Once complete. Servers were then handed over to Support.

Hanover, Md, Us

Created scripts to automate SAN migration storage from EMC, MacData and NAS Filer migrations for over 300 servers for storage consolidation. This included scripts to manipulate multipath configurations files, to update and validate new WWN as well as expand filesystem as needed. Configure a SAN mount point to meet Project Migration deadlines from anywhere from 10 to over 100 LUN WWN ids per servers running on IBM HS22 and X series as well as HP Proliants. Created bash shell scripts for WWN ID validation for servers running Oracle ASM Disk. Created ASM disk as well as expanded file system volume to meet the growing need of storage disk space.Created bash shell scripts to determine Bladelogic connectivity using bash nc -z to the listening socket and trapped the errors to resolve issues regarding processes in stale states as well as restarting the process to revolve the problem. Also wrote scripts to dynamically show the daily reports for executives to assist in capacity management. Create Perl scripts to call Redhat Satellite Server system calls for patch management issues that required solutions due to Satellite Server UI latency as well as identifying and grouping patches that were deemed critical based on factors such as production servers and time sensitive audits. Implemented HP orchestration software to manage large server file configuration, builds and automation.

Round Rock, Texas, Us

Advise and build technical solutions for provisioning over 100 servers both physical and virtual.Created VM template system to clone standard builds instead of using kickstart or building from ISO. Also created post scripts for IP NIC configurations and hostnames. .Implementation of new hardware, operating systems and other required software on clients systems.Architect new POC RHEL 6.4 physical to virtual with Raw Mapped Device on Complellent SAN with an SLA of 10 days.Creating Server Deployment and Provisioning Solution to increase server builds using cobbler, powershell, VMWare API for server build and puppet for service configuration management.Created github internal server form CMS contact push/pull. Works on abstract and complex problems requiring evaluation of intangible variables.Develops innovative and creative output based on interpretation and analysis that improve business.Perform and contribute to corporate goals and strategic intent. - Opportunity/risk analyses - Cost/benefit analyses - Pricing modelsActs as a subject matter expert in the design, architecture and deployment of new systems to keep the server. environment stable and interruptions to a minimum in standalone and mufti-tiered environments.Provides deep subject matter expertise, advice and program delivery.Influences others through their professional/technical expertise.Manages critical projects, customer engagements or business processes.Contribute technical expertise and automation to improve build time.Provides leadership, guidance and advice to customers architectural designs.Works across the organization to effectively obtain and allocate resources to complete programs and projects on time.Allocates work and mentors others.Presents facts and information to negotiate mutually acceptable design solutions.Thorough understanding and management of customer business needs and expectations.

Ft. Lauderdale, Fl, Us

Migrated Linux Suse 11 SLES environment and upgraded system OS and Kernel to new hardware HP platform from SAN bootable to local disk.Configure Environments and package management.Tested APP and CID DB and application connection as well as configure services, account authentication and environment paths.Configure AD authentication.

Hanover, Md, Us

Build out over 300 Redhat 5.7 servers on using XCat with Kickstart and HPSA, HPOO and Blade Logic Provisioner on IBM HS22 and HSX Blades on Blade Center environment. Created administrative scripts for NIC bonding and user account setup. Configure LUNs from EMC Symmetric to Emulex HBA using multipath. Designed and documented Oracle RAC ASM implementation. This included installing the packages, adding the modules, scanning the bus, checking and validating the FC link, labeling LUNs, and quorums, initializing the LUNs, creating volume group and logical volumes, creating ASM raw disks, setting up XTunneling, tuning the kernel parameters, setting up and testing RAC VIP. Resolved production issues using scripting methodologies for large user base as well as server based configuration issues. Configure SMTP mail relay. Troubleshoot, resolve and investigate root cause via analyzing both system and application logs, test service connectivity, rescue system from kernel panic mode. Upgrading Emulex firmware. Enabled jumboframes as well as created it's end to end test process.

Amsterdam, North Holland, Nl

Provision and build out HP Proliant DL servers using HPSA and HPOO. Assisted in creating and standardizing base builds for Oracle and Weblogic. Created post install script to configure ILO using hponcfg to set user name and password Extend and create LVMs using NetApp LUNS on existing Linux servers as well as configuring multipath for failover environment. Created bash shell scripts to clean up old kernels to meet compliance needs for over 600 servers. Repackaged in-house tar builds to rpm format and created yum repos to better manage software packagesAssisted in security hardening scripts

Fort Lauderdale, Fl, Us

Advise current RedHat Linux Administrator as well as resolve ongoing issues for the dot com environment. This included resolving issues with Web Servers. Design solutions using a combination of bash shell scripting concepts to monitor and resolve third party software issues. Configure Apache server, as well as native services such as NFS, NTP, Samba and NIS, Assess current working AIX P5 Series (Hardware, OS, Application, Monitoring Solutions) to “scope and scale” a more efficient inexpensive methodology. Configured Solarwind SNMP on servers for monitoring application and alert notifications. Implement best practice for further capacity planning. Implemented and migrated over 3000 jobs to CA AutoSys for job scheduling. Re-engineered prior working IT models to create a practical working solution for external departments which includes Revenue Management, Business Intelligence and Application Support Teams as well as create proper Documentation on “How to” for all teams. Resolve critical issues that impacted business revenue by diagnosing and resolving VMware, Oracle and RedHat Application Server on IBM DS4800 SAN with IBM eServer BladeCenter on HT Chassis infrastructure. This included kernel tuning, testing disk I/O, networking bottlenecks, dynamic memory allocation and ballooning in relation to the applications design. Resolve VMware constraints, using working knowledge of client/server architecture in multicasting mode. Gathered system information and system auditing using NMON, MySQL/PHP for storing, analyzing and creating calculations to prevent incidents as well as displaying historical information using rrdtool and HTML to create dashboards and system graphs. All projects were done on a project based life cycle to ensure optimum service to the customer.

Fort Lauderdale, Fl, Us

Engineer post sales Manage Hosted project from ground up. This includes projects with HP BL460c Series, and VMware ESX. Tasks were to install and configure OS (Redhat Enterprise 5, CentOS). Configuring hardware/software for remote console lights out approach. Create Oracle file systems layouts and configure LUNS on Netapp for disk as well as tune kernel parameters for the Oracle instance. Configured Fiber Channel HBA for both QLogic and Emulex. Design and implement hardening scripts based on security rules and services and DMZ configuration. Design internal Search Engine using PHP. Designed turnkey approach using PXE boot and Kickstart methodology to streamline OS installations in more of a manageable way. Responsible for engineering new approach and design techniques to accommodate for expansion and organization. This includes streamlining current environment with the use of shell scripting, Also provided support for HPUX Superdome Itanium 64. This includes managing LVM, Kernel tuning requests and application support related issues as well as OS related issues.

New York City, Ny, Us

Administrate 3000 Linux servers in a net booted environment and support Linux Farms and 400 way clusters. Create Linux Custer servers on Dell 1855 for Data Mining/Data Warehousing environments. This includes partitioning hard drives, creating swap space, formatting disk, creating ext2 file systems, install system packages, configure network interface card and IP if needed and add routing tables. Set up and configure services to startup upon boot such as: sendmail, NFS, SSHD, NTP, DHCP, FTP Rsync, Samba, gmond, Syslog-nd and Crond. Control load balanced and high availability environments using both Radware Load Balancing techniques along with in house concepts. Develop and support shell scripts to obtain optimum system performance and monitoring. Diagnose complex system and network problems using dumps, traces, or other diagnostics tools. Diagnose system performance problems as well as develop web based tools for NOC department to utilize system indicators for entire Linux server environment to troubleshoot, and diagnose application incidents as well as improve operations. Develop Linux based environment for in house applications and system components and aid in installation by end users. Develop methodologies based on best practice to optimize system configurations and installation of OS on cross platform hardware environment. Recommend and change system parameters or configuration variables to improve overall system performance. Review job control/scripts and assist in modifications of systems for optimum performance and operation.

Fort Lauderdale, Fl, Us

Integrate IT Revenue Management Software Solution on RHEL 3.4 Servers. Coordinate Oracle Database installation and configuration. Install and configure Tuxedo applications on a HPUX Environment. Configure monitoring solutions using Unix Shell Scripting and Control M. Maintain High Availability solutions using Veritas Cluster Server.

New York City, Ny, Us

5 Lexis-Nexis Boca Raton, Fl Operations SpecialistStreamline system environment to perform daily routine functions. This includes configuring ftp services, ssh shared keys, NFS services, sendmail to handle and monitor data mining stored on an EMC Symmetrix SAN VxFS mounted filesystem on Sun Servers running Solaris 8. Created client/server Perl scripts to automate routine processes to check for new incoming data, transfer those files, translate the file to proprietary format using grep tr awk and sed, split, distribute file parts to a 400 way cluster for further data mining processing and then import the data to the production environment. Created Unix Shell scripts to monitor data mining process which includes checking for network connectivity, application connectivity and checking for scheduled processes running. Responsible to log all transactions, including data mining, in house application logging, error handling. Designed Unix Korn Shell scripts to handle system and application errors that can occur during daily processes which include, sending email and or cell phone automated notifications, handle application failover processes and disk and file system failover process. Create a backup-recovery strategy to synchronizes production data with off site failover environment and remotely manage off site disaster recovery environment. Develop monitoring UI using Perl/TK.

Bonn, De

Maintain and support a Unix and Windows Data Center environment. Support HP-UX 10.20 on HP9000 D class servers as well as HP-UX 11.0 on K and N class servers. Manage system’s disk I/O performance, memory, CPU usage and intercommunication processes. Troubleshoot devices such as CD-ROMs, and tape devices. Informix Dynamic Server on an HP-UX 10.20 and 11.0 environments. Support and troubleshoot Compaq Alpha running Windows 2000 and HP D, N and K class servers running HP-UX, which includes: file systems disk spaces and quotas, Informix databases backup and recovery, replication, accounts, profiles, networking MC Service Guard Clustering, hardware maintenance, and Korn Shell scripting.

Mumbai, Maharashtra, In

Responsible for file system backup script and recovery. Install and configuring software such as BMC Patrol on a HP-UX platform along with installing HP-UX 10.20 on HP9000 D Class servers. Analyze system log information to resolve video, audio and data issues. Documented SOPs for related system problems. Develop Perl and Unix shell scripts to monitor Unix and database processes, load tables and startup database upon reboots. Used SQL to query tables on an Informix Relational Database for any troubleshooting issues. Being with NDS exposed me to Unix installations, satellite telecommunication, TCP/IP, NFS, broadcasting technology, conditional access, audio, video and data multiplexing.

Ca

Duties include maintaining hardware and software on a Solaris 2.6 system. Perform database administration tasks including monitoring Oracle database processes and database activity, performance, and table space. Develop and maintain C, Perl and Unix shell scripts that perform various database or system tasks (database loads, maintenance tasks and updates). Implement database backup and recovery strategies and procedures in a 24/7-production environment running cellular technology.