Manager Management

TUSHAR CHATTERJEE

Email: ************@*****.*** 614-***-****

PROFILE: A task-oriented Linux/Unix System Administrator looking for assignments that uses my

technical and inter-personal skills or a role evaluating new technology especially in the Linux systems and

Security / Networking marketplace.

SUMMARY

• Around 8+ years of IT experience as Linux and Solaris (UNIX)/AIX System Administrator in a

diverse, distributed and mission critical Enterprise networked multi-platform environment.

• Experience working with Red hat Linux, use and UNIX on x86 HW and RISC.

• Extensive experience in setup, configuration, upgrade, maintenance, performance monitoring and

troubleshooting on different UNIX platforms like Linux, VMWARE and system software and

hardware.

• Experienced working in fast-paced, deadline-oriented environments. Proficient in Capacity

Planning, and Security setups.

• Installing, upgrading, patching and configuring Sun Solaris 10 & 11 on Sun Servers using

Jumpstart Servers and Interactive Installation. Hands on experience in administration and

maintenance of application services like DNS, Mail, HTTP, Apache Tomcat, Squid, DHCP,

SMTP, FTP, NIS and NFS.

• Good understanding of Active Directory, TCP/IP, Send mail, NIS, Packaging & Patching.

• Experience in developing Network infrastructure technologies like DNS, NFS, Samba, NIS,

DHCP, SMTP, FTP, SSH, and web servers like Apache HTTP & Tomcat.

• Knowledge in Volume management, Disk Management, software RAID solutions using Symantec

VERITAS Volume manager. Veritas Cluster Suit (VCS) and ZFS file system

• Monitoring through Nagios, set up and install Nagios server and clients, Zabbix as a Part of

monitoring integration team. Design and document Escalation Matrix.

• Installing new Software, monitoring the system, troubleshooting, maintaining local documentation,

adding security and helping the users.

• Familiar with Change Management Process. Worked in BMC Remedy, CA service desk tool

and JIRA. Ability to multitask in a fast paced environment under strict time guidelines and resolve

production incidents with minimum impact to customers with round the clock on call support.

TECHICAL SKILLS:

Operating Systems: LINUX,RHEL(4/5/6),Fedora,ESXihypervisor(/4.0/5.0),Solaris10(Unix),

Ubuntu10/11/12, SPARC,x86,Application System Architecture and design.

Storage: EMC, NetApp

Security: Firewall, TCP/IP Wrapper, SSH, SCP

Scripting: BASH, PERL, Ruby with Puppet

Middleware: Apache, Apache-Tomcat, JVM

RDBMS: Oracle 10g, 11g

Virtualization: VMware, Solaris Zones, Amazon AWS, EC2

Tools: Nagios, VERITAS File Systems VXFS (v4.x, 5.x) AdminTool Remote Admin,

Symantec VERITAS volume manager, Puppet, CFEngine, LVM,Zabbix.

Multipathing

Networking: ZFS, NIS, NIS+, DNS, NFS, RPM, YUM, LDAP and LAN, WAN, Firewalls, HTTP

Server, AWK.

Protocol: FTP, HTTP, UDP, Telnet, ARP

Application: Java based application support knowledge.

ITIL process. Ticketing System. JIRA, CA Tool

Process:

ACCOMPLISHMENTS

Diagnosed hardware and software failures and resolved technical issues with a 99% success

rate.

Deploy and supporting the Development and Production critical corporate applications like Web

server, Web based application, Java based application. Performance analysis using tools

like Nagios, AppDynamics, prstat, mpstat, iostat, sar, vmstat,

Completed patching of 750 production boxes and 22 non prod boxes in Cardinal health

EDUCATION

• Bachelor of Technology in Computer Science & Engineering from SIET, Meerut

UPTU University 2005, Lucknow, U P, India

CERTIFICATION

RHCE Certificate Number: 805************

PROFESSIONAL EXPERIENCE

Sep, 2014- Present

Client: cardinal Health (http://cardinalhealth.com/), Dublin, OHIO

Linux/Unix Systems Administrator

$91 billion health care services company that improves the cost-effectiveness of health care. As the

business behind health care, Cardinal Health helps pharmacies, hospitals, ambulatory surgery centers,

clinical laboratories, nuclear medicine and physician offices focus on patient care while reducing costs,

enhancing efficiency and improving quality.

Roles/Responsibilities:

Providing support & Implementation for Linux and Solaris which include Change

Implementation, Security Patching, hardware firmware upgrade, enhancing features.

• Managing SAP servers and Linux based real time application as per compliance guidelines.

Working on AWS and EC2 cloud and provisioning and managing infrastructure.

• Deploy and configuration through Puppet and CFEngine and build up new RHEL server base as

per organization expansion. Write new rules through Puppet.

• Implement Security release and patch from RHN and get compliance from other team and

patching Linux boxes including DMZ zone servers.

• Security consultant responsible for hardening hosts against intrusion according to government

and security industry best practices.

• Managing Virtual boxes, optimizing resources through DRS and manage Multipathing for physical

database server, working on LVM, RAID and file systems.

• Collaborated with DBA and DevOps teams to jointly provide the best possible services and

solutions, working on AWS cloud.

• Monitoring and doing Admin task on SUSE and Red Hat HA cluster and VCS cluster. Tuning of

Cluster,

• Managing and logging tickets and incidents in service now ticketing tool logged change control

and follow up with CAB meeting and security Sox compliance management

Dealing with the Vendor (Red hat/Novel/HP/IBM) and provide necessary support as and when

Needed for ensuring 100% uptime of managed Servers

Environment: RHEL 6, SUSE 11, AIX 7.1, VMWARE VCentre manager, Service Now

Jul 2012 – May, 2014

Altisource Business Solutions

Client: Bank of America and Ocwen Bank (Atlanta, GA and Miami, FL)

Linux Systems Administrator

Roles/Responsibilities:

• Overseeing installation, configuration & troubleshooting of 3000+ Linux, unix and Windows

systems in (Physical & Virtual) in a 24/7 environment.

• Finding and filling the system Performance gaps with Kernel Tuning, Memory Tuning, and CPU

Tuning & File System Tuning.

• Design, Implement, Engineer and Operate scalable and reliable Linux Server Infrastructure.

• Leading and guiding a team of highly skilled Linux professionals and carry out DevOps operation

For Java based application and roll out the new infrastructure

• Debug Diagnostic and Evaluation of third party & open source application for infrastructure

solutions.

• Monitoring and doing Admin task on Red Hat cluster (HA cluster) Suit.

• Deploy bug fixes and releases and up gradation of OS, Exposure on IaaS and PaaS

• Responsible for requirements gathering, design, testing and deployment of DR process.

• Experience with VMware Virtualization using ESX hypervisor of V sphere 5.1

• Managing Virtual boxes, optimizing resources through DRS.

• Install and deploying infrastructure monitoring policies through Nagios, Zabbix.

• Using common scripting languages like Bash and Python to automate regular admin jobs.

• Experience in Disaster Recovery and Planning.

• Write and push new rules and configuration in Puppet for Linux servers manage SVN server for

build and software development management.

• Diagnosing system bottlenecks through root cause analysis after high severity incidents.

• Interact closely with multiple teams in analyzing each service outage, measure, maintain,

enhance and present the service quality metrics to management.

• Developing and maintaining processes, tools, and documentation for support to maintain the

stability of production environment.

Environment: VMWARE (ESXi 4.0/5.0/5.1), EMC,Ubuntu 10/11,RHEL 3/4/5, Sun Solaris 10/Solaris 11,

VERITAS Net backup 5.1,SRM(for DR), Sybase, Citrix, Apache web servers, Tomcat application servers.

Oracle and JAVA

Feb 2011--Jul 2012

Aditya Birla Minacs IT Services, India

Client: M365/Sybase365 (now part of SAP America)

Linux Systems Engineer

Roles/Responsibilities:

• Part of product support team which is Managing Sybase365 international messaging platform.

• Providing remote support for production boxes on Linux/Solaris, which includes Changes

Implementations, security patching, implement application build, enhancing features and solving

high impact incidents within SLA and maintaining 99.9% availability.

• Deploy ISMS Platform in US Datacenter on behalf of Sybase365.

• Providing root cause analysis (RCA) for each service impacting incident with all possible

corrective actions for improvement.

• Configuration, implementation and administration of NFS, NIS, DNS, and LDAP Linux

environment. Maintain RedHat HA and VCS cluster for telecom application.

• Understanding and troubleshooting skills with networking communications and protocols such as

TCP/IP, NFS, DNS, SMPP.

• Expertise in creating and managing Logical Volume Manager in Redhat Linux.

• Expertise in Installation, Configuration of Package and Patch Management.

• Experience in Disaster Recovery and Planning.

• Problem determination, Security, automation and Shell Scripting.

• Handling High Severity Incidents and providing support on 24/7 environment.

• Monitor and manage all major Service Impacting Incidents/Change and take preventive actions to

avoid such outage.

• Provides planning, leadership, direction and advanced technical expertise in the field of System

Administration.

Environment: RHEL 3/4/5, Sun Solaris 10, VMWARE SRM (for DR), Sybase, Citrix, Apache web

servers, Tomcat application servers, EMC storage, LDAP, SS7, SMPP protocol. Unix/Windows

Workstations and Clusters

OnMobile Global Ltd, India Nov 2009 – Feb 2011

Clients: BSNL, IDEA, Vodafone

Operation Engineer

Roles/Responsibilities:

• Install Configuration & implementation of service of Voice Base and SMS ( Apache/Tomcat) in

Linux Cluster. Troubleshoot the application issue and restart of services.

• Working on SUBMGR (Billing system). Configure links and circles. Troubleshooting the

connectivity issues and manages some network task. Hardware configuration, installation and

management on HP servers, DELL power edge, Dell Equallogic ASM.

• Handling and generating tickets via the Remedy ticketing tool and JIRA.

• Configured ILOs and Console connections for HP servers, Sun Servers.

• Client software and third-party HBA’s, Qlogic and Dialogic card for telecom application.

• Experience with VMware Virtualization using ESX hypervisor of Vsphere 4.0

• Datacenter setup and Migration of Applications on Oracle Enterprise and Java Applications.

• Deploy and test the migration of OnMobile Billing platform from SUBMGR to PRISM which sold to

Other telecom VAS company.

• Analysis Clients requirement and represent for product development and capacity planning.

• Work out with application team to help telecom application like WAP, UMP, and Billing.

Environment: RHEL 4/5, Sun Solaris 10, Apache web servers, Tomcat application, Redhat Cluster,

Telecom protocols, Dialogic and other Telecom hardware and servers,SS7,SMPP protocol.

Unix/Windows Workstations and Clusters, MySQL database and replication, Telecom Billing application

May 2008 to Jul 2009

I2K2Networks Pvt Ltd, Noida, India

Linux Administrator

Roles/Responsibilities:

• Manage Zimbra Mail and Web servers.

• Linux firewall configuration and implementation.(ipcop)

• Server Virtualization and implementations.

• Configure and implement Linux Mail and Web server.

• Nagios monitoring tool.

• Update OS and system file through patches.

• Worked on DNS and SSHD, Kick Start installation.

• Lead a team of four people.

Environment: RHEL 4/5, Apache web servers, Tomcat application, Redhat Cluster, Unix/Windows

Workstations and Clusters. MYSQL database and SQLGrey, Clamav, Zimbra, IIS server

Aug’06 to Jul ’07

Progressive InfoTech Pvt. Ltd., New Delhi, India

Clients: Acer, Amway HCIL, ITC and Times of India

Technical consultant

Roles/Responsibilities:

• Installation, Configuration and troubleshooting of user end systems.

• Disk space & file system management.

• Application and Software support.

• Taking backups and restoration.

• Troubleshooting network for connectivity related issues.

Environment: RHEL 4, Unix/Windows Workstations, Windows application

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