Rajan Yerunkar
Senior Manager - System Administrator
Mumbai
Summary
Professional Linux systems specialist with 10+ years of experience in managing and optimizing enterprise-level infrastructure. Skilled in server administration, scripting, and troubleshooting, with strong focus on security and performance. Known for collaborative teamwork, adapting to changing priorities, and consistently delivering results. Proficient in Red Hat, CentOS, Ubuntu, as well as AiX & Solaris
Overview
15
15
years of professional experience
Work History
Senior Manager, System Administrator
3i Infotech
Navi Mumbai
11.2022 - Current
- Provided strong leadership to enhance team productivity and morale.
- Led cross-functional teams to achieve project milestones and deliver high-quality results.
- Reduced costs, optimized resource allocation, and improved efficiency in managing projects.
- Improved team performance by providing comprehensive training and fostering collaborative work environment.
- Mentored junior staff members for skill development and career progression within organization.
- Installed system-wide hardware components, confirming interoperation and compatibility with Linux-based software distros.
- Interacted directly with users to diagnose and correct major system issues and address concerns.
- Tuned system performance to optimize efficacy of new and existing hardware components.
- Maintained high availability of web applications by configuring and managing Apache HTTP Server and Nginx reverse proxy servers.
- Managed vendor relationships for hardware procurement, software licensing renewals, and ongoing support contracts to optimize costs while maintaining quality service levels.
- Reduced recovery time from system failures by designing and implementing robust backup strategies and disaster recovery plans.
- Ensured data security by implementing strong cybersecurity measures and regularly monitoring for potential threats.
Manager
Apmosys Technologies PVT LTD
09.2021 - 11.2022
- Gathered, documented and modeled data to assess business trends.
- Evaluated current processes to develop improvement plans.
- Produced detailed and relevant reports for use in making business decisions.
- Restructured procedures through coordination with compliance director to create and execute projects.
- Resolved problems, improved operations and provided exceptional service.
- Advised developers on problems with databases, performance and other issues.
- Recommended changes and corrections to developers for optimal software performance and usability.
- Operated under Agile and Scrum frameworks to complete releases and well-organized sprints.
- Utilized Agile software development methods to increase team efficiency by 90%.
- Incorporated delivery requirements into planning of testing schedules.
Tech Shift Lead
DNEG PVT LTD
06.2021 - 10.2021
- Supervised work of contracted employees to keep on task for timely completion.
- Resolved problems, improved operations and provided exceptional service.
- Quickly learned new skills and applied them to daily tasks, improving efficiency and productivity.
- Developed team communications and information for meetings.
- Used critical thinking to break down problems, evaluate solutions and make decisions.
- Conducted research, gathered information from multiple sources and presented results.
- Monitored all company inventory to ensure stock levels and databases were updated.
Senior Linux Administrator
Apmosys Technologies PVT LTD
08.2018 - 03.2021
- Provided input on hardware and software purchasing, prioritizing return on investment to optimize IT spending.
- Tuned system performance to optimize efficacy of new and existing hardware components.
- Maintained smooth operation of multi-user computer systems through collaboration with hardware and network engineers.
- Installed system-wide hardware components, confirming interoperation and compatibility with Linux-based software distros.
- Interacted directly with users to diagnose and correct major system issues and address concerns.
- Managed backup and disaster recovery through strict data control and retention policies, personally handling recovery tasks when issues arose.
- Coordinated cross-site installation of networked systems, confirming post-install connectivity.
- Led and assisted technical upgrade projects for clients by working and coordinating with consultants and developers for integrations.
- Monitored contracts and service level agreements to identify potential risks and implement mitigation actions to protect development process from unforeseen delays and costs.
- Developed project plans identifying key issues, approaches and performance metrics.
- Analyzed architecture design, scoping, implementation, testing and deployment needs to define project requirements.
- Increased IT productivity, efficiency, agility and responsiveness, leading team of 58 to design high-availability solution.
- Proposed and implemented system enhancements to improve performance and reliability of storage environment.
- Organized internal audits and led efforts to determine and remedy deficiencies.
- Sped up and simplified application and resource provisioning.
- Designed, documented and executed maintenance procedures, including system upgrades and patch management using update manager.
- Developed and trained junior team members by leveraging industry experience to achieve optimal project strategy.
- Performed independent analysis and provided recommendations to overcome project obstacles.
- Implemented actions to mitigate risk by developing contingency and avoidance strategies.
- Planned, executed and controlled assigned projects, ensuring work performed complied with contractual requirements.
- Recruited, hired and supervised resources to staff project team.
- Defined responsibilities and roles of 40 team members.
- Provided team with coaching and direction.
- Met with manager weekly to provide detailed project report and milestone updates.
- Led team of engineers in providing design and engineering solutions to various clients and market sectors.
- Closely collaborated with project members to identify and quickly address problems.
Linux Administrator
Unotech Software PVT LTD
04.2016 - 07.2018
- Installed system-wide hardware components, confirming interoperation and compatibility with Linux-based software distros.
- Tuned system performance to optimize efficacy of new and existing hardware components.
- Interacted directly with users to diagnose and correct major system issues and address concerns.
- Evaluated vendor products such as Nagios XI, GLPI, OTRS, Nagios Reactor for incorporation into single and multi-site architectures.
- Managed backup and disaster recovery through strict data control and retention policies, personally handling recovery tasks when issues arose.
- Preserved system documentation accuracy via Fortnight updates, including data and graphical refreshes.
- Resolved vulnerabilities by making improvements to network security.
- Made recommendations regarding information technology infrastructure overhauls.
- Analyzed complex project server issues and worked on large enterprise and business-critical applications.
- Maintained flexible schedule and responded to after-hours and weekend emergencies.
- Standardized job tasks and trained junior team members on industry best practices and standards.
- Quickly learned new skills and applied them to daily tasks, improving efficiency and productivity.
System Administrator
Obviea Business Solutions LLP
03.2015 - 04.2016
- Installed important security and functionality patches to maintain optimal protections against intrusion and system reliability.
- Established network specifications and analyzed workflow, access, information and security requirements.
- Designed proactive preventive maintenance schedules to prevent unnecessary downtime and hardware faults.
- Created patches and solutions to fix bugs in existing applications.
NETWORK ENGINEER
DVOIS-SSV TECHNOLOGY PVT LTD
01.2010 - 12.2014
- SSV is a leading Network Services company, it provides Internet and gives Cable tv Services too.
- KEY ROLE.
- Switching/Routing.
- Bandwidth Allocations.
- Optical fiber testing / connection setup -REMOTE DESKTOP ENGINEER APR'14-SEP'14.
- Administered and prepared programs for IP addresses, developed network resources and trained support personnel to provide Tier I support to end users.
- Identified means to reduce and control expenses by conducting cost, schedule and contract performance analysis and improving resource allocation.
- Liaised with cabling infrastructure vendors and domestic ISPs.
Education
High School Diploma -
Maharashtra State Board
Navi MumbaiSkills
Ssh, Ftp, Samba, Apache web based server, Backup, Monitoring Tools(Nagios,Centreon)
Mysql, Mariadb
TCP/IP
Mail Sever : Postfix
Mail Application: Thunderbird, Outlook, Windows live
Backups (Linux)
Monitoring Storage (Linux)
Bandwidth Usage (Linux)
User Management (Linux)
VPS Handling
Programming Skills :- Shell, bash Scripting
Nagios core, NagiosXi, Centreon – Monitoring Tool
Nagios Reactor – Automation tool
RunDeck - Automation Tool
Grafana – Graph Monitoring
CMDB/OCS – Inventory Management
Yowsup – Custom Whatsapp Alert Automation
Server Management
Application testing
Multi-User System Management
Samba proficiency
Skilled in Apache
Knowledge with RedHat
Technical Analysis
System upgrades
Servers expertise
Infrastructure planning
Hardware knowledge
Administrative Policy Development
Leadership
Project Management
Vmware
Nagios
Centreon
Jenkins
Devops
Load Balancer
Kernel
Automation
Jmeter
OTRS
AppDynamics
Dynatrace
Timeline
Senior Manager, System Administrator
3i Infotech
11.2022 - Current
Manager
Apmosys Technologies PVT LTD
09.2021 - 11.2022
Tech Shift Lead
DNEG PVT LTD
06.2021 - 10.2021
Senior Linux Administrator
Apmosys Technologies PVT LTD
08.2018 - 03.2021
Linux Administrator
Unotech Software PVT LTD
04.2016 - 07.2018
System Administrator
Obviea Business Solutions LLP
03.2015 - 04.2016
NETWORK ENGINEER
DVOIS-SSV TECHNOLOGY PVT LTD
01.2010 - 12.2014
High School Diploma -
Maharashtra State Board