Active Directory Administrator

Stephen Agyapong

+347******* ***********@*****.*** Elkridge, MD

PROFESSIONAL SUMMARY

An experienced and responsible Linux System Administrator with a great ability to support data center environment and solve their technical needs, by applying my experience within the areas of system administration and ability to complete deadline driven projects.

Extensive experience with Ticketing and Workload Management – IBM Service Now, IPCenter/Ipmon.

Experience working with Keynote(Dynatrace) and App Dynamics

Custom Hospitality Booking Technologies – Holidex, TPF, Avalon, Gemfire and Dash

Extensive experience troubleshooting Linux operating System

Experience with F5 Load Balancer, Stingray and Akamai

Experience with administering VMware Infrastructure Client 3.5 and vSphere 5.5. and 6.5

Experience in the documentation of key operational processes and SOP’s

Enthusiastic team player with professional work ethic, a positive attitude and open to new ideas

Excellent organization skills and multitasking abilities

EDUCATION

Bachelor of Science in Business Administration

University College of Management Studies 2004

RHCSA Certified October 2020

TECHNICAL SKILLS

Operating Systems: RHEL 4/5/6, CentOS, Fedora

Hardware: HP ProLiant, Blade servers, Dell R320, R410, R420, R510R910, R810, R710, R610 PE 2970,PE 2980, PE M10 Sun T2000, T5120 T5420, V490

Software: MS-PROJECT, Linux file system, MS Office, ESX 4.x, 5.x, Tomcat, Web/ Application Server, Apache,

Servers/Services: NFS, SSH, FTP, Apache, DNS, Nagios, LDAP

VI Editor, gedit, and emac

Senior Linux System Administrator

March 2020- Present, National Oceanic and Atmospheric Administration (NOAA), College Park MD

Provide system administration support for Red Hat Linux systems

• Build and maintain virtual machine systems according to specified requirements

• Install hardware components and system software

• Install in-house and Commercial Off-the-Shelf (COTS) software

• Perform housekeeping functions, including the deletion of orphaned processes, backing up critical files and maintaining recovery processes

• Troubleshoot and resolve system hardware and software problems

• Maintain Red Hats (IDM) Identity Management

• Interface with vendor technical personnel in providing problem resolution

• Provide email support including account creation and end-user instruction

• Provide in-house technical training as required

• Assist in the maintenance of system-level IT security procedures

Monitor and support the processes, which move and manipulate environmental data throughout the computing environment

• Attend and actively participate in scheduled meetings

• Accurately diagnose technical problem/situations in a timely manner

• Support system switches from primary to backup systems, as required

• Provide assistance with network security problems as required

• Maintain Dynamic Host Configuration Protocol (DHCP) servers

• Monitor system logs and activity on all servers and devices

• Collaborate with other staff engaged in similar functions and solve various Hardware and software problems

• Effectively communicate issues and resolutions to all levels of the organization in a timely manner

• Apply upgrades and patches to operating systems and applications software and maintain records of all software version levels

• Perform end-user training and provide assistance to mid-level and junior system administrators

• Participate and contribute ideas and suggestion to IT architecture planning and implementations.

• Tune, optimize, and measure application performance over a large scale IT environment.

• Maintain virtual systems via the customer solution

• Create and maintain Ansible playbook per customer standards

• Document environments to ensure maintainability of all systems worked on

• Work with other customer and project stakeholders to assure a smooth transition of the NIC systems and applications

• Communicate effectively both oral and written form to all level of organization

Senior Linux System Administrator

January 2018- Febuary 2020, Federal Transit Administration, Washington, DC

Install, configure, administer, optimize and support system servers and related components.

Analyze, diagnose, troubleshoot and resolve software problems.

Highly-skilled knowledge in the documentation of key processes and ensuring systems conform to information security policies, practices, applicable federal mandates, and meets or exceeds business needs.

Excellent oral and written communication skills with demonstrated ability to communicate effectively across all organizational teams and with customer.

Extensive knowledge in building customized software from source.

Documentation and Tracking of issues, logs and audit files.

Update server baseline document in line with changes on servers.

Installed and implemented new patches to Linux operating system.

Installation, configuration and daily Support of Apache Web server.

Install. Configure, and administer Oracle WebLogic Server.

Deploy applications, create domains and start Oracle WebLogic servers.

Monitor domain resources, set up and use node manager, deploy applications, configure database resources and configure clusters of Oracle WebLogic servers.

Ensure appropriate security measures are applied using benchmarks and security standards. Remediates compliance issues based on vulnerability, and internal audit reports for the operating system.

Plan, install, administer, and apply operating system patches and upgrades on a regular basis for the Red Hat Linux operating systems and other software and custom applications.

Participates in technical research and development to enable continuing innovation within the infrastructure.

Create, change and delete user accounts upon request.

Track, report, support, investigate and troubleshoot server issues.

Participates in server disaster recovery testing and upgrades associated with emergency and system exercises.

Research configures and implements Personal Identity Verification Single Sign-on smart card/Linux interaction authentication.

Implement Linux server replication/synchronization.

Update server baseline document in line with changes on servers.

Checks alert logs, trace files and file system maintenance.

Performed daily system administration activities.

Provide afterhours support for critical mission systems

Mentor junior staff in understanding emerging technologies and processes

Serve as POC for the Linux team in both internal and external communications

Research third-party tools and solutions for integration into developmental and operational environments

Make recommendations to senior management on fixes for hot-button issues and bottlenecks within the enterprise environment

Linux System Administrator

InterContinental Hotels Group (Operations) - Alpharetta, GA - July 2016 to December 2017

Interact with client to help resolve and troubleshoot their day to day issues.

Managed systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance.

Performed RPM and YUM package installations, Change Management requests for software releases, patches.

Writing and modifying cron and at scheduling jobs through bash scripting.

Installed and configured Logical Volume Manager – LVM and RAID

Configures DNS, NFS, FTP, Apache, HTTPS, DHCP remote access, and security management

Created and maintained user’s accounts, profiles, security, rights disk space and process monitoring.

Provided technical support by troubleshooting Day–to-Day issues with various Servers on different platforms.

Develop and Maintain documents, library, and procedural documents of the system

Management of user accounts, files, and directory permissions, and securing UNIX systems to match industry best practices

Provides system administrative support for servers and workstations;

Software and hardware upgrades and routine systems maintenance by installing current Patches and Packages;

Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution

Administers VMware Infrastructure Client 3.5 and vSphere 5.5.

Monitor multiple applications via keynote, Dash, App dynamics to help check critical alerts and troubleshoot them.

Maintain and support day-to-day data center operations such as Single Sign-On w/LDAP, Active directory.

Create and update runbooks

Ticketing and Workload Management – IBM Service Now, IPCenter/Ipmon.

Load Balancing Technologies – Brocade Riverbed Stingray, F5

Custom Hospitality Booking Technologies – Holidex, TPF, Avalon and Gemfire

Linux Administrator

Rhee Brothers Inc - Hanover, MD - January 2014 to June 2016

Installs, configures and supports Apache Tomcat on Linux production servers

Resolve and troubleshoot problems through log files analysis (JVM logs )

Setup and configure LAN and Firewall

Ability to work under pressure and within defined processes

Experience administering, installing, configuring and maintaining Linux.

Experience installing, upgrading, and configuring RedHat Linux 4.x, 5.x, 6.x using Kickstart Servers and Interactive Installation.

Responsible for creating and managing user accounts, security, rights, disk space and process monitoring CentOS and RedHat Linux.

Installs, upgrades and manages packages via RPM and YUM package management

Installs Firmware Upgrades, kernel patches, systems configuration, performance tuning on Unix/Linux systems.

Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution.

Manages Patches configuration, version control, service pack and reviews connectivity issues regarding security problem.

Manages systems routine backup, scheduling jobs and enabling cron jobs.

Works with Database administrators to tune kernel for Oracle installations.

Ability to communicate technical issues at a level that is easily comprehensible to a variety of audiences

Senior Linux Administrator

HD Supply White Cap - Hyattsville, MD - June 2011 to December 2013

Created, cloned Linux Virtual Machines, templates using VMware Virtual Client 3.5 and migrating servers between ESX hosts.

Installed RedHat Virtualization Linux Service using kickstart.

Managed systems routine backup, scheduling jobs, enabling cron jobs, enabling system logging and network logging of servers for maintenance.

Performed RPM and YUM package installations, patch and other server management.

Installed and configured Logical Volume Manager - LVM and RAID.

Configures DNS, NFS, FTP, remote access, and security management

Provided 24/7 technical support to Production and development environments Administrated DHCP, DNS, and NFS services in Linux.

Create and maintain user's accounts, profiles, security, rights disk space and process monitoring.

Provided technical support by troubleshooting Day-to-Day issues with various Servers on different platforms.

Develop and Maintain documents, library and procedural documents of the system

Management of user accounts, files and directory permissions, and securing UNIX systems to match industry best practices

Provides system administrative support for servers and workstations;

Software and hardware upgrades and routine systems maintenance by installing current Patches and Packages

Utilizing SAR, Netstat, Iostat and Vmstat for performance analysis, tuning and capacity planning, problem prevention, detection, and resolution

Administers VMware Infrastructure Client 3.5 and vSphere 5.5

Linux Administrator

Rapid Solutions Inc - Laurel, MD - June 2010 to May 2011

Assisted senior-level administrator in various aspects of Linux (RedHat) server administration including installing and maintaining the operating system software, performance monitoring, problem analysis and resolution and production support

Disk Management like adding, deleting, and replacing of hot swappable drives on existing servers, partitioning per requirement, creating new file systems

Established and maintained user accounts, assigned file permissions and established password and account policies

Troubleshoot and resolved basic level system hardware, software and communications problems

Performed basic system monitoring, verified the integrity and availability of all hardware, server resources, systems and key processes, reviewed system and application logs, and verified completion

Monitored server and application performance &tuned I/O, memory

Installation of SSH and configuring of keys base authentication

Installation and configuration of MySQL and Apache

Performed backup/restore operations using tar, and gzip

Maintaining appropriate filesystem security and monitoring status of process in order to increase system efficiency

scheduling system related cron jobs.

Performed PC support and maintenance

Installed and upgraded video cards, modems, hard drives, IDE controllers, SCSI drives, power supplier and memory components.

Performed system configuration and troubleshooting.

Create and manage user accounts and security

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