Systems Administrator Windows Server

Jonnathan Giraldo

Las Vegas, Nevada *********.********@*****.*** 702-***-**** www.linkedin.com/in/jonnathan-giraldoo PROFESSIONAL SUMMARY

Multiple years of experience as a Cybersecurity Contractor, and Systems Administrator, with a strong focus on IT security management. Specializing in team leadership, project execution, and the development of robust Cybersecurity strategies in alignment with industry-standard frameworks such as NIST, ISO 27001, and CIS Controls. Proficient in identifying and resolving network, hardware, and software vulnerabilities, while enhancing security policies and procedures. Demonstrated success in collaborating across IT departments to secure diverse physical and cloud environments, driving projects that integrate comprehensive security frameworks. Spearheaded the design, planning, and implementation of a secure network infrastructure for a logistics company’s warehouse, standardized security protocols, and ensured Windows 11 OS deployment compliance across the organization. EDUCATION

University Of Nevada, Las Vegas Las Vegas, Nevada

Cybersecurity Professional Program September 2023 – June 2024 Courses: Computer Networking, Microsoft System Security Administration, Cybersecurity Infrastructure Digital Forensics and Incident response, Social Engineering, Ethical Hacking, and Threat Hunting. CERTIFICATION & SKILLS PROFILE

Certifications: Incident Response Expert Certificate, AWS Cloud Practitioner Certification CompTIA SEC+ and ISC2 CC (Expected 2024)

Operating Systems: Cisco IOS, Windows Server 2016, Windows Server 2022, Windows 10, Windows 11, Mac OS, and Kali Linux, Ubuntu, Debian.

Networking: Ubiquity Networks, Cisco Meraki, Juniper. Programming Languages: JavaScript, HTML, and Python. Tools: Windows Server Environment, Linux Server Environment, Active Directory, Cisco IOS, Ubiquity Networks, Wireshark, Network-Miner, Power-Shell, Autopsy, Volatility, HxD Hex Editor, Snort, Splunk, OSSEC, OSINT, MITRE ATT&CK, Cyber Kill Chain.

Security Management: Clam AV, VirusTotal, Snort, TCPdump, ELK Stack, Splunk, Microsoft Sentinel, Suricata, Wazuh, OSSEC.

PROFESSIONAL EXPERIENCE

ShipMonk, Las Vegas, Nevada July 2023 – Current

Systems Administrator

Responsible for managing, maintaining, and troubleshooting server infrastructure, network systems, security policies, users and groups. Expertise in deploying and configuring Windows/Linux environments, ensuring system security, and optimizing performance. Continuously monitor logs, backups, and end-user support with a proven track record of maintaining systems up time, hardware refresh cycles, and Cybersecurity best practices.

Ensure high availability and optimal performance across multiple sites and IT systems, through best practices frameworks.

Streamline on-boarding of users and OS imaging across the company by implementing a standardized Windows image, update roll out procedures, and structuring Active Directory users, groups, and policies.

Maintain network health across multiple sites by implementing VLANs, VPNs, SSIDs, Firewalls, and AP channel optimization.

Ensure smooth implementation of new technology by vetting and testing hardware/software from different vendors.

Provide mentorship to Jr. team members, fostering collaboration and professional development. Equiniti, Brooklyn, New York August 2022 – July 2023 IT Support Specialist / Systems Administrator

Maintain strict adherence to regulatory and compliance policies, create and integrate security policies, best practices, and frameworks. Collaborate with teams across the US and the UK on the migration process from on premises infrastructure to Microsoft Azure Cloud infrastructure, participate in disaster recovery and incident response simulations.

Provide expert-level support for enterprise applications, including troubleshooting and resolving technical issues reported by end users.

Monitor and manage application incidents from inception to resolution, ensuring minimal disruption to business operations.

Monitor IT equipment performance, conduct routine health checks, and implement necessary preventive measures to maintain system stability.

Closely worked with development, IT infrastructure, and business teams to identify and address technical issues, implement improvements, and align with business requirements.

Create group policies, users, computers and administer active directory servers. Astreya, New York, New York August 2021 – August 2022 IT Support Specialist at Google

Provide technical support to Google employees locally and remotely, resolving Level one and Level two support tickets. Further improved the OS deployment process and streamlined data collection of new assets, provided weekly reports to management and supervisors on efficiency of deployment procedures.

Track and manage hardware and software, including asset inventory and licensing.

Building and deploying desktop, laptop, mobile device, and servers as required using imaging systems.

Provide desktop hardware and software troubleshooting and support as well as printers, IoT devices and other peripheral devices.

Communicate with department managers to help make new hardware procurement decisions that intersect with IT equipment, and are vetted by the security department.

Work with different departments and teams to address overlapping issues and develop implementations plans.

Train users on appropriate device use, and security awareness as needed. Business Owner, Las Vegas, NV September 2017 – August 2021 Computer Repair technician

Responsible for diagnosing, troubleshooting, and repairing computer hardware and software issues. Provide excellent customer, and technical support for a wide variety of clients, performing system upgrades, preventive maintenance, and assessments, improving performance and reliability.

Diagnosed and repaired hardware and software issues on a wide range of computer systems, including desktops, laptops, peripherals, and mobile devices.

Performed upgrades and installations, enhancing performance and functionality while ensuring compatibility with existing systems.

Provided technical support and troubleshooting for operating systems (Windows, MacOS, Linux) and various software applications, resolving issues efficiently and effectively.

Conducted preventive maintenance and routine check-ups to ensure optimal performance and extend the life cycle of equipment, reducing downtime and upgrade cycles. PROFESSIONAL PROJECTS

Digital Forensics, TDX Arena August 2023 – June 2024 Utilize tools like Wireshark, Wazuh, and Splunk to identify malware installed on devices, remove malware, create signature based detection rules and harden firewalls.

● Utilize security monitoring tools for investigation of SIEM alerts.

● Perform an investigation utilizing Wiresharks filtering options, allowing for discovery of network vulnerabilities and access to the affected systems.

● Create signature based rules to detect other instances of malware infection, and removal. Securing Network Infrastructure, TDX Arena August 2023 – June 2023 Harden network security utilizing multiple firewall systems, Routers, Switches, Endpoints, End Point Detection and Response (EDR), Network Intrusion Detection Systems (NIDS), and Intrusion Prevention Systems (IPS).

● Create firewall rules, Router rules and configurations, encryption mechanisms, and access controls.

● Interconnect network devices, servers, and end points to a segregated network infrastructure.

● Install and configure Network security management tools like Snort, Suricata, Wireshark, Splunk, and ELK Stack.

● Create monitoring dashboards for simple visualization and parsing of network data, allowing for simplified detection and response.

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