Technical Support Systems Administrator

EBRIMA MANJANG

Westerville, OH 475-***-**** ******.*******@********.*** LinkedIn

CORE SKILLS

Ethical Hacking Threat Hunting Digital Forensics Reverse Engineering Incident Response SIEM Network Defense Cloud Security Active Directory Azure AWS Microsoft 365 VMware (vSphere, ESXi, vSAN) Hyper-V WSUS Backup & Recovery Disaster Recovery TCP/IP VPN DNS DHCP SMTP SSL Firewall/Router/Switch Configuration Wireless Access Points Network Monitoring PowerShell SQL Server Elasticsearch Oracle VM RDP Group Policy KACE Project Management Asset Management IT Policy Writing User Training Procurement Helpdesk & Technical Support

EDUCATION

University of New Haven, West Haven, CT

Master of Science in Cybersecurity and Networks — May 2024 University of The Gambia, KMC, The Gambia

Bachelor of Science in Information Systems — May 2018 CERTIFICATIONS

CompTIA Security+ (In Progress), CompTIA Linux+ (In Progress), Azure Administrator Associate (Planned), AWS Certified Solutions Architect – Associate (Planned), CISSP (Planned), CCNA (Planned) PROFESSIONAL EXPERIENCE

GamCyber LLC, Columbus, OH

Cybersecurity Analyst & Systems Administrator — January 2025 – Present

• Led cybersecurity consulting projects for SMB clients, delivering risk assessments, vulnerability scans (Nessus, OpenVAS), endpoint security deployment (Bitdefender GravityZone), and compliance audits (NIST CSF, CIS Controls, MITRE ATT&CK). Performed penetration tests (Nmap, Metasploit), reducing attack surfaces by 40%, and designed secure, high-performance network architectures including advanced firewall configurations (pfSense, Untangle), VPN tunnels (IPSec, SSL-VPN), VLAN segmentation, routing/switching optimization, and zero-trust access policies.

• Managed Microsoft 365 and Azure AD tenant configurations, including Exchange Online protection policies, sensitivity labels, Secure Score hardening, and Conditional Access enforcement. Oversaw user lifecycle management, license assignments, and automated provisioning with PowerShell and Azure AD Connect. Integrated Office 365 security and compliance features such as DLP, email encryption, and audit logging to ensure regulatory alignment with HIPAA and GDPR.

• Implemented cloud IAM controls in Microsoft Azure and AWS, including RBAC, SAML 2.0 integrations, and Privileged Identity Management (PIM). Developed PAM strategies using CyberArk labs to secure administrative credentials. Built Splunk SIEM dashboards to monitor logs, detect anomalies, and investigate incidents. Leveraged Snort, Elasticsearch, and threat intelligence feeds to enhance detection rules and strengthen defenses.

• Authored and enforced information security policies (Acceptable Use, BYOD, Remote Access) and led phishing simulation training, reducing user susceptibility by 30%. Created incident response playbooks, performed root cause analysis, and conducted forensic investigations on compromised systems.

• Expanded expertise in reverse engineering of malware samples to extract Indicators of Compromise (IOCs) and inform threat hunting operations. Applied Identity Threat Detection and Response (ITDR) techniques to uncover credential misuse and privilege escalation.

• Deployed RMM platforms (Kaseya, Atera, WSUS) for centralized patch management and asset inventory tracking. Procured cybersecurity tools (Veeam, Bitdefender, Microsoft), provided Tier 1–3 technical support, and reduced recurring issues by 45%.

• Directed disaster recovery planning by designing backup strategies, implementing failover solutions, and running recovery tests to ensure business continuity and system resilience. Safe Haven Security, Columbus, OH

Installation Technician — ADT Security Services Jul 2024 – Dec 2024

• Installed, tested, and configured smart home security systems including CCTV, smart locks, window/door sensors, smoke and CO2 detectors, and smart sirens.

• Conducted security risk assessments for 100+ households and provided clients with tailored recommendations for system improvements.

• Reduced repeat service calls by 30% through comprehensive user training on security device operations.

• Maintained compliance with safety standards and ADT protocols, ensuring consistent installation quality. University of New Haven, West Haven, CT

Student Support Technician Specialist — Jan 2023 – May 2024

• Designed and implemented an AI-powered chatbot on the Student Tech Support website to automate responses, reducing support load and improving response times.

• Installed, configured, and repaired student systems (Windows, macOS, Linux), ensuring devices were operational and optimized for academic use.

• Managed KACE Service Desk tickets, resolving technical issues related to system performance, account access, and hardware/software malfunctions.

• Provided Duo MFA setup, troubleshooting, and password reset services, ensuring secure student accounts and information.

• Conducted diagnostics and performance testing, recommending upgrades or adjustments to optimize devices for academic applications.

• Led IT onboarding sessions, trained students on system access and troubleshooting, and collaborated with IT staff to create resources, reducing follow-up inquiries and enhancing helpdesk efficiency. University of New Haven, West Haven, CT

Part time - Provost Scholar and Teaching Assistant — Aug 2023 – May 2024

• Collaborated with professors in curriculum planning, assignment grading, and delivery of lecture support materials.

• Delivered individualized and group tutoring in cybersecurity, networking, and systems administration, resulting in improved student comprehension and contributing to a 20% increase in average course pass rates. Guaranty Trust Cooperation, Gambia Ltd, Banjul, The Gambia Systems Administrator — Oct 2018 – Jul 2022

• Administered 700+ systems (Windows Server, Red Hat, CentOS, Linux) and managed virtualization environments

(VMware, ESXi, Hyper-V, Docker) for servers, jump-boxes, and 500+ endpoints.

• Led patch management using WSUS, conducted vulnerability assessments, and implemented fixes aligned with MITRE ATT&CK, CIS, NIST, ISO 27001, and DoD frameworks.

• Managed Active Directory, multi-site replication, user permissions, and deployed Untangle firewalls and Forescout NAC for endpoint security and compliance.

• Managed hybrid IT environments (on-prem and Azure), overseeing IIS, secure SMTP, FTP, and SFTP configurations.

• Configured DNS, DHCP, Cisco routers/switches, implemented network segmentation, and optimized routing/switching for performance and security. Managed Azure-based infrastructure to provision virtual machines, deploy and monitor Windows/Linux servers, and extend on-prem Active Directory into Azure AD. Administered Office 365, including mailbox provisioning, license assignments, and security group management to support organizational productivity and compliance.

• Supported core banking systems, Swift Payment platform, and SQL/PLSQL/Oracle databases, ensuring data consistency, integrity, and high availability.

• Managed ProcessMaker for ticketing and automation, providing Tier 2/3 support using Dameware and RDP to 500+ staff. Led onboarding, hardware deployments, and issue resolution.

• Mentored two junior admins, handled IT budgeting, procurement, and vendor negotiations, reducing annual IT cost.

• Contributed to disaster recovery planning, backup strategies, and failover testing to ensure business resilience. VOLUNTEER EXPERIENCE

Graduate Student Council, University of New Haven, West Haven, CT

• President (Jan 2024 – May 2024), Executive Vice President (Aug 2023 – Jan 2024)

• Led student governance initiatives, advocated for student welfare, and promoted mental health awareness.

• Served on multiple university committees focused on enhancing student life and educational outcomes.

Contact this candidate