Jonathan O'Sullivan

Experience

• 

  Defense Security Cooperation Agency

  Sept 2009 - Dec 2011

  Consolidated Client Infrastructure System Administrator

  As a Tier 3 Engineer contracted through Innovative Management Concepts, I provided advanced technical support and managed key infrastructure projects for HP Blade Consolidated Client Infrastructure and thin clients. My role included the design, deployment, and administration of virtualized environments, as well as ensuring compliance with Department of Defense (DoD) security standards. Key responsibilities and accomplishments included:Virtualization & Infrastructure Design: Introduced Type 1 virtualization technologies, including Microsoft Hyper-V and Citrix XenServer. Designed and deployed a 400-user Citrix XenDesktop environment using HP Blade technology.Thin Client Management: Deployed and managed HP Windows Thin Clients within DoD Security Technical Implementation Guide (STIG) standards, ensuring robust security and compliance.Endpoint Management: Utilized Symantec Altiris Deployment Solution for remediation, image deployment, and lifecycle management of IT assets. Conducted hardware repairs, warranty processing, and Return Merchandise Authorizations (RMAs) for laptops and desktops.Security Compliance: Configured Microsoft Group Policy Objects (GPOs) to meet DoD STIG compliance requirements. Implemented McAfee Host-Based Security System (HBSS) with firewall and Data Loss Prevention (DLP) modules within the XenDesktop environment. Conducted vulnerability scanning and analysis using Retina, coordinating with the Defense Information Systems Agency (DISA) to address audit findings.Project Management & Reporting: Led the deployment of the Numara FootPrints ticketing system to track IT workload metrics and improve project management. Regularly generated reports for management, providing insights on system performance and project progress.IT Process Improvement: Created standard operating procedures (SOPs) and documentation to streamline employee training and system management. Developed a database system for inventory tracking of IT assets. Show less

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  Accelera Solutions

  Jan 2012 - Jan 2015

  Senior Virtualization Engineer

  As an IT Consultant with Accelera Solutions, I supported over 30 virtualization projects, leveraging technologies from Citrix, Microsoft, VMware, and Cisco. I led deployments for private sector clients and major U.S. government agencies, including the National Nuclear Security Agency, U.S. Department of Defense, U.S. Securities and Exchange Commission, and U.S. Department of State. Key responsibilities included:Virtualization Deployment: Designed and implemented large-scale XenDesktop and XenApp environments on VMware ESX, Citrix XenServer, Microsoft Hyper-V, and Amazon Web Services (AWS), tailored to meet diverse client needs.Network Optimization: Configured Citrix NetScaler and Branch Repeater, utilizing features like Access Gateway, SSL Offload, Load Balancing, and Global Server Load Balancing (GSLB) to optimize network performance.Mobile Access Integration: Enabled secure XenDesktop and NetScaler access on iOS, Android, and Windows Phone, improving user flexibility.Security Hardening: Applied guidelines from DISA and ICANN to harden Windows, Linux, and VMware systems, ensuring robust security.Application Packaging: Packaged applications using VMware ThinApp and Citrix for streamlined deployment in virtual desktop environments.Advanced Security: Implemented multi-factor and smartcard authentication for secure Citrix environments, enhancing data protection. Show less

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  Citrix

  Jan 2015 - Aug 2015

  Senior Consultant - Networking Practice

  As a Senior Consultant at Citrix Professional Services contracted through OpSight LLC, I provided expert guidance and hands-on implementation of advanced virtualization solutions for government clients, including the Missile Defense Agency, FBI, and U.S. Census Bureau. My role focused on designing, deploying, and optimizing Citrix environments to enhance IT efficiency, security, and scalability. Key responsibilities included:Virtualization Design & Deployment: Led projects to architect and deploy Citrix XenDesktop and XenApp solutions, ensuring seamless integration across existing infrastructures. Successfully implemented environments on platforms like VMware ESXi and Microsoft Hyper-V to support thousands of users.Network Optimization: Configured Citrix NetScaler for load balancing, SSL offloading, and secure remote access, optimizing performance and ensuring high availability. Integrated advanced networking features to enhance resilience and user experience.Security Compliance: Worked closely with clients to meet strict security standards, implementing multi-factor authentication (MFA) and Public Key Infrastructure (PKI) solutions. Applied best practices in line with government security guidelines to ensure compliance.Client Training & Support: Provided comprehensive training for IT teams and ongoing support to streamline system management. Developed best practice documentation to facilitate smooth operations and rapid issue resolution.Project Management: Managed end-to-end project lifecycles, from requirements gathering to post-deployment support, coordinating cross-functional teams to ensure timely and successful delivery.During my time at Citrix Professional Services, I specialized in tailoring solutions to meet the specific needs of government agencies, enhancing system performance, reducing costs, and improving security. Show less

• 

  NOAA Satellite and Information Service

  Sept 2015 - now

  As a Cloud Computing Specialist contracted through GAMA-1 Technologies, I am an integral part of the SCDII Cloud Engineering team, supporting diverse aspects of cloud infrastructure and service delivery. My key responsibilities include:AWS Cloud Infrastructure: Architecting, implementing, and managing AWS cloud solutions, leveraging services like Lambda, EC2, S3, RDS, and more. Focusing on optimizing performance, security, and scalability for enterprise IT environments.Cybersecurity & Threat Management: Collaborating with the cybersecurity team to enhance cloud security protocols and ensure compliance. Implementing and managing endpoint protection with CrowdStrike Falcon to detect, prevent, and respond to threats across cloud environments.Containerization & Orchestration: Designing and deploying containers using Docker and Kubernetes to ensure efficient, scalable application operations. Creating custom solutions to facilitate seamless integration and management across environments.CI/CD Pipeline Development: Implementing continuous integration and continuous delivery (CI/CD) pipelines using GitLab, automating processes for build, test, and deployment. Automation & Configuration Management: Employing code-defined infrastructure tools to automate configuration management, ensuring consistent and reliable deployments. Developing scripts using Bash, Python, and other languages to support automation tasks.Documentation & Process Improvement: Producing comprehensive documentation, including SOPs, diagrams, and agile-related artifacts. Collaboration & Problem-Solving: Working closely with cross-functional teams, translating business needs into technical solutions. Demonstrating strong analytical skills, troubleshooting issues swiftly and effectively.Agile Practices: Contributing to agile project management, backlog refinement, and user acceptance testing (UAT). Documenting and tracking tasks in Atlassian Jira, ensuring transparency and accountability. Show less As a Senior Systems Engineer contracted through GAMA-1 Technologies, I managed and optimized cloud infrastructure and virtualization environments, focusing on performance, security, and compliance across various platforms. My role involved:AWS Management: Managed AWS resources, including WorkSpaces and AppStream 2.0, ensuring seamless virtual desktop and app delivery. Implemented security measures, cost optimization strategies, and compliance with industry standards.Citrix Administration: Configured and supported Citrix Virtual Apps and Desktops, as well as Citrix NetScaler for efficient load balancing. Focused on performance, scalability, and user experience.Security Management: Deployed security solutions using Trellix, Keeper Security, and SSL/PKI. Managed endpoint security, SSL certificates, and implemented best practices to protect data integrity.Virtualization Expertise: Oversaw VMware ESX environments, ensuring optimized resource allocation and system performance. Managed virtual machines, applied patches, and resolved technical issues efficiently.Network Monitoring: Configured and maintained network observability using Sensu Go, ensuring proactive incident response and network health monitoring.Integration and Authentication: Facilitated secure single sign-on (SSO) using SAML protocols, managing identity and service provider configurations for seamless application access.Collaboration and Documentation: Collaborated with development teams to manage software tools, maintain documentation for configurations, and optimize software delivery. Show less

  • Cloud Computing Specialist - Master

    Sept 2024 - now

  • Senior Systems Engineer

    Sept 2015 - Aug 2024