Aman Kumar Singh
New Delhi
Summary
Sr. System Administrator – IT with 8 years of experience in IT infrastructure management, system administration, cloud operations, and end-user support. Proficient in managing Windows, Linux, and VMware environments, along with network security and AWS services including EC2, S3, IAM, and CloudWatch. Experienced in overseeing IT operations, optimizing system performance, maintaining high availability, and implementing scalable technology solutions that support business objectives and operational efficiency.
Overview
1
1
Certification
9
9
years of professional experience
Work History
Sr. System Admin
FCI-CCM
Noida
12.2025 - Current
- Managing Active Directory including user provisioning, group policies, OU structure, and access control.
- Administering and maintaining Linux servers (RHEL, CentOS, Ubuntu) in production and development environments.
- Managing user accounts, groups, sudo privileges, and file system permissions.
- Performing Linux server installation, configuration, patch management, and security hardening.
- Monitoring server health, CPU, memory, disk utilization, and system performance using native and third-party tools.
- Troubleshooting Linux OS, application, network, and service-related issues to ensure maximum uptime.
- Performing daily health checks on domain controllers, DNS, DHCP, and replication.
- Monitoring CPU, memory, disk, and network performance on all servers.
- Analyzing Event Logs and resolve hardware, OS, and application-level issues.
- Applying monthly patches, OS updates, and security baselines.
- Maintaining Windows Server environments and ensure optimal performance and uptime.
- Monitoring and maintaining Windows servers for uptime, performance, and security.
- Managing Office 365 users, licenses, shared mailboxes, DLs, and retention policies.
- Maintaining SOPs, technical documentation, network diagrams, and backup reports.
- Working on ITIL-based incident, problem, and change management tasks.
- Coordinating with vendors/ISPs for issue resolution.
- Providing L3 support for escalated incidents from L1/L2 teams.
- Creating and managing user accounts, security groups, and access permissions.
- Troubleshooting hardware and software issues affecting servers or end-user systems.
- Managing switches, routers, firewalls, and wireless access points for stable connectivity.
- Coordinating with ISPs for WAN, internet, or other issues.
- Monitoring and managing endpoint protection tools (e.g. antivirus, firewalls, and intrusion detection systems). Bitdefender, Sophos, Trellix).
- Performing vulnerability scans (Nessus, OpenVAS) and patching identified issues.
- Reviewing firewall rules, logs, and user access for anomalies.
- Ensuring compliance with frameworks such as ISO 27001 and SOC 2.
- Conducting periodic security awareness training for users.
- Handling escalated tickets via ServiceNow, BMC Remedy, or ManageEngine.
- Providing advanced troubleshooting for hardware, OS, email (Office 365/Google Workspace), and application issues.
- Managing IT asset lifecycle — procurement, tracking, and disposal.
- Lead or assist in infrastructure upgrade or migration projects.
- Working with vendors for AMC renewals, hardware replacement, and software procurement.
- Evaluating and deploying new IT tools (e.g. DLP, patch management, MDM).
- Supervised AWS cloud services (EC2, S3, IAM, CloudWatch) to enhance performance and minimize costs.
- Executed data backup and disaster recovery plans utilizing Veeam and AWS Backup tools.
- Led IT support staff to ensure efficient incident response and request handling.
- Administered Active Directory, DNS, DHCP, and Group Policy for over 300 users.
- Managed vendor relations for procurement processes, AMC renewals, and project implementations.
- Updated IT documentation and maintained configuration records alongside asset inventories for operational efficiency.
- Installed hardware and software components for reliable network system.
- Troubleshot hardware and software issues, restoring functionality swiftly to mitigate impact.
- Managed IT projects, aiding technical development in line with department strategy.
- Conducted regular system backups, ensuring data integrity and availability in case of disaster.
- Installed and maintained IT equipment and software to meet workflow requirements.
Sr. IT administrator
Barcode India Ltd
Gurugram
11.2024 - 07.2025
IT Administrator
Scry AI
Gurugram
09.2021 - 11.2024
IT Engineer
Cignex Datamatics Pvt ltd
Gurugram
03.2021 - 09.2021
IT Engineer
Quess corp limited
04.2020 - 02.2021
Consultant Desktop Support Engineer
Teamlease Services Pvt ltd
Gurugram
06.2018 - 03.2020
Customer Support Engineer
Aforeserve.com Ltd
04.2017 - 03.2018
Education
Bachelor of Computer Applications (BCA) - Information Technology
Swami Vivekanand Subharti University
Meerut, IN-UP01-2023
12th - PCM
PBS college
BSEB Board Patna01-2013
Skills
- Windows Server versions 2016 and 2019
- JumpCloud and ManageEngine platforms
- M365 administration: Exchange, SharePoint, Office 365, Intune
- Linux system administration
- Antivirus solutions: Bitdefender and Sophos
- Data loss prevention tools: Seqrite, Trellix, Forcepoint
- Service desk systems: ServiceNow, YouTrack, BMC Remedy
- Incident management processes: requests and changes
- AWS services including EC2, S3, IAM, CloudWatch
- Cisco switch management: Series 3850
- Dell SonicWall configurations: NSA 2700 and TZ 670
- Proficient in IT project management
- Vendor relationship strategies
- Operating system patching and updates
- Compliance frameworks: ISO 27001 and SOC2
Certification
- AWS Certified Solutions Architect & Security from Infosectrain.
- Hardware and Networking Course from IACM institute.
Languages
English
Proficient
C2
Hindi
Advanced
C1
Hobbies and interests
- Playing cricket
- Watching Series on OTT
- Singing
Timeline
Sr. System Admin
FCI-CCM
12.2025 - Current
Sr. IT administrator
Barcode India Ltd
11.2024 - 07.2025
IT Administrator
Scry AI
09.2021 - 11.2024
IT Engineer
Cignex Datamatics Pvt ltd
03.2021 - 09.2021
IT Engineer
Quess corp limited
04.2020 - 02.2021
Consultant Desktop Support Engineer
Teamlease Services Pvt ltd
06.2018 - 03.2020
Customer Support Engineer
Aforeserve.com Ltd
04.2017 - 03.2018
Bachelor of Computer Applications (BCA) - Information Technology
Swami Vivekanand Subharti University
12th - PCM
PBS college