Sharan Singh

I took a career break to provide full-time care for my ill mother. With their recovery and full-time care now in place, I am eager to re-focus on my professional career.

• Management of 600+ RHEL6/7 Lenovo and HP servers, 300+ VMs ESXi 6.5
• Install/Upgrade/Patch RHEL6/7 servers.
• Create/manage VMs on ESXi hosts.
• Ansible and Bash scripts for automation and changes.
• Configuration of DNS, NFS, HTTP, FTP, NTP, FTP.
• LVM storage configuration and management.
• System monitoring and servicing alerts.
• Change and incident management/troubleshooting.
• Collaboration with technicians at datacenters for hardware related issues and procurement of new hardware.
• Supporting releases and provide on-call support.
• Worked flexible hours across night, weekend, and holiday shifts.
• Worked well in a team setting, providing support and guidance.

• Management of 800+ RHEL6/7 dedicated IBM/Lenovo and HP servers and 200+ ESXi 5/6 VM hosts.
• Provided support for trading clients from CITI and other companies.
• Built new RHEL 7.3 servers and upgraded kernel from 7.1 to 7.3 using Ansible scripting.
• Configuration of Solarflare 10G NICs for Market Data real time feeds.
• Configuration NIC bonding & NIC binding.
• PTP time sync for trading servers to use precise time for time-critical trading apps.
• Setup ITRS monitoring.
• Creation & maintenance of Linux VM guests and templates on ESX5/6.5.
• Bash/Ansible/Cronjobs scripts for automation.
• Configuration of NFS, AutoFS, Sendmail, NTP, LVM.
• Fine-tuned various OS and NIC parameters to improve application performance.
• Worked directly with clients to resolve various issues, perform changes and projects deliverables.
• Raised cases with Redhat, IBM, Netapp vendors to remediate OS/Hardware level issues.
• Created architecture design and day-to-day support documents.
• Provided on call support and weekend rotations.

• Administration of 1000+ Oracle Enterprise Linux 6, Centos 5/6, Windows servers and VDI desktops in highly virtualized environment hosted on ESXi 4.x/5.x.
• Created host clusters for high availability of VMs.
• Created and maintained VM templates for Web, App and DB servers and windows 7/8/10 VDI desktops.
• Created host clusters for high availability of VMs.
• Installed/configured Opensource Spacewalk server for rpm repository.
• Installed and configured Opensource Puppet server for change management.
• Configured NIC bonding, NTP, DNS, DHCP, NFS, CIFS, SSH, VPN, NAS, Crontab.
• Troubleshoot sev1,2&3 incidents/tickets
• Performed capacity analysis of old VMs and servers and made changes to OS version, RAM, CPU, Disk.
• Provided on call support weekend rotations.

• Mainly worked on migration project for upgrading SAS environment from SAS 9.2 to 9.4 version on newly built Redhat 6 servers.
• Installation of 500+ RHEL 6 servers from scratch using kickstart.
• Troubleshoot OS/Network issues.
• Setup Nagios monitoring.
• Installed SAS 9.4 GRID on Linux servers.
• Installed SAS 9.4 client on user Windows desktops remotely using Tivoli package manager.
• Created documentation on SAS 9.4 startup and shutdown procedures and created architectural diagrams.
• Worked with SAS Support to troubleshoot SAS related issues.
• Provided 24X7 support on weekend on rotational basis.

• Worked in Capital Market and Sales branch having 30+ live applications with 3000+ servers running on Linux/Windows platforms.
• Migrated Solaris server to Redhat 5.3 dedicated servers.
• Migrated dedicated servers to VM’s on ESXi host.
• Installed and configured Apache, Weblogic, Oracle DB 10/11g, IIS.
• Installed and configured ITRS for monitoring.
• BASH scripts for backup, restore and log rotation.
• Participating in daily basis manager level meetings to analyze architecture of existing application and new on-boarding applications and provided design recommendations.
• Interfaced with users from three regions AMRS, EMEA, APAC to understand requirements for a project or to get details on existing issues.
• User, Storage and File System management.
• Configured DNS, DHCP, NFS, CIFS, SSH, VPN, NAS.
• Troubleshoot various OS, Network and App level issues and done RCA.
• Made various kernel parameters changes on the fly and permanently.
• Coordinate with offshore teams to schedule various activities to be performed around the clock and on weekends.
• Created and maintained architecture diagrams and documentations for various internal/external applications.
• Troubleshooting sev1,2&3 tickets.
• Provided 24X7 L3 support on weekend on rotational basis.
• Change Management and Problem Management tools such as Maximo and Remedy.