Gregory Walker
Oakwood,Ohio
Summary
Driven Systems Administrator with 15 years of experience in software implementation and maintenance. Proven history of managing complex infrastructures and data center operations. Expert in solutions-oriented business application problem-solving and dedicated to providing best-in-class service. Skilled at troubleshooting, communication and collaboration.
Overview
14
14
years of professional experience
Work History
Sr. Systems Administrator
Leidos a NASA Contractor
10.2023 - Current
- Conducted regular audits of IT systems to identify areas for improvement and ensure compliance with industry standards such as CIS benchmarks .
- Evaluated emerging technologies for potential integration into existing infrastructure, enhancing capabilities while maintaining cost effectiveness.
- Enhanced team collaboration, implementing centralized version control systems for code repositories.
- Implemented virtualization technologies to maximize resource utilization and reduce physical server footprint in the data center.
- Reduced security incidents with proactive monitoring and timely patching of systems.
- Designed secure network architectures, minimizing the risk of unauthorized access or data loss.
- Implemented rigorous system monitoring, enabling rapid identification of potential issues before they escalated into problems.
- Spearheaded migration efforts to cloud-based platforms, reducing operational costs and increasing scalability.
- Diagnosed and resolved hardware and software issues.
- Planned and implemented upgrades to system hardware and software.
- Monitored networks and network devices to resolve technical problems quickly.
- Designed and evaluated WAN and LAN connectivity technologies.
Systems Engineer
Peerless Technologies - NASA Contractor
04.2014 - 10.2023
- Improved system performance by identifying and resolving technical issues in a timely manner.
- Completed software updates and assessed security patches for optimized computer use.
- Evaluated new tools and technologies for possible integration into existing infrastructure environments.
- Analyzed system requirements, developing tailored solutions that met or exceeded client expectations.
- Coordinated with stakeholders throughout all stages of the project lifecycle from inception to completion.
- Maintained stability, integrity and efficient operation of information systems supporting organizational functions.
- Conducted regular system audits to ensure compliance with industry best practices and regulatory requirements.
- Verified compliance with applicable performance metrics and compatibility expectations.
- Implemented networking and server changes to meet client budgets and needs.
- Enhanced network security by implementing encryption measures and conducting regular vulnerability assessments.
- Contributed to strategic planning sessions, offering insights from systems engineering perspective to guide company technology decisions.
- Conducted in-depth system audits to identify and rectify potential vulnerabilities.
- Reduced system downtime significantly with proactive maintenance and rapid response to issues.
- Provided 2nd and 3rd level technical support and troubleshooting to internal and external clients.
- Designed and implemented system security and data assurance.
- Evaluated new AWS services and features, providing recommendations for integration into existing workflows.
System Administrator
Wyle Information Systens
05.2011 - 04.2014
- Simplified troubleshooting processes by creating detailed documentation for system configurations, procedures, and best practices.
- Provisioned new software and hardware for use, following established security policies.
- Managed user access rights to maintain a high level of information security while ensuring appropriate levels of accessibility for authorized personnel.
- Maintained a high level of customer satisfaction by providing rapid, accurate response to inquiries and concerns regarding system performance or functionality.
- Optimized resource allocation through virtualization technologies such as VMware ESXi for more cost-effective server management.
- Provided Tier-2 support for escalated issues, troubleshooting complex problems in a timely manner to minimize disruption to users'' productivity.
- Supported developers with code deployments, environment setup, and troubleshooting application-related issues on RHEL platforms.
- Installed important security and functionality patches to maintain optimal protections against intrusion and system reliability. RHEL platform
- Analyzed log files for anomalies, identifying potential intrusions or malicious activity before significant damage occurred. Splunk Platform
- Stayed up-to-date on the latest developments in Linux technologies and best practices, sharing knowledge with team members to continuously improve processes and systems.
- Enhanced storage performance by optimizing configurations and implementing regular maintenance routines. HP 3PAR SAN platform
Education
Associate of Science - Data Science
PSI Institute of Cleveland
Cleveland, OHComputer Science
Cleveland State University
Cleveland, OHSkills
- Windows administration
- Incident management
- Patch management
- Network administration
- IT security management
- ITIL processes
- Storage area networks
- Virtualization technologies
- System automation
- Disaster recovery planning
- Server consolidation
- Linux administration
- Hardware troubleshooting
- Server management
- Data security
Timeline
Sr. Systems Administrator
Leidos a NASA Contractor
10.2023 - Current
Systems Engineer
Peerless Technologies - NASA Contractor
04.2014 - 10.2023
System Administrator
Wyle Information Systens
05.2011 - 04.2014
Associate of Science - Data Science
PSI Institute of Cleveland
Computer Science
Cleveland State University
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