Da'Marcus Sumrall Network And Security Technician

CCNA and Security+ -certified NOC Tech specializing in network administration and cybersecurity. Hands-on experience configuring routing and switching, implementing network security including OSPF, NAT/PAT, DHCP, and performing packet analysis. Known for strong troubleshooting skills and the ability to deploy and secure enterprise-style network environments.

• CISCO CERTIFIED NETWORK ASSOCIATE (CCNA) CERTIFIED
  
  CompTIA SECURITY+ CERTIFIED

• Class A,B, and C ip address subnetting
• Intervlan routing/ switching with OSPF, DHCPv4, and SSH using 4331 router, 2960, and 3560 multilayer switches
• Applying ACL and telnet with subnetting and inter-vlan routing
• Performed DHCP configuration and security testing including spoofing scenarios.
• Performed packet capture and protocol analysis using Wireshark to identify connectivity and performance issues.
• Built and tested network topologies simulating real-world scenarios.
• Authenticated radius server with 3 routers and 2 switches
• Configured and verified site-to-site IPsec VPN connectivity between remote networks, including tunnel establishment, encryption, and troubleshooting.
• Configured cisco ASA firewall interfaces, security levels, NAT/PAT, and ACL
• Managed and configured cisco ASA firewalls using ASDM

Ranken Student Intern  (August 2024-May 2026 )
• Configured OSPF, DHCP, NAT/PAT, VLANS, ACLs, and SSH on Cisco routers and switches.
• Built and troubleshot enterprise network topologies using Packet Tracer and physical equipment.
• Performed subnetting and VLSM design for multiple network environments.
• Implemented Dynamic ARP Inspection and
DHCP security controls.

IT Firm Internship (May-September 2025)

• Provided technical support to end users by troubleshooting and resolving account access, password reset, and login issues.
• Assisted employees with wireless network connectivity problems and general desktop support.
• Created, configured, and maintained user accounts in company systems and applications.
• Installed, configured, and updated operating systems, software applications, and security patches on workstations.
• Diagnosed and resolved basic hardware and software issues to minimize downtime and improve user productivity.
• Documented support requests and maintained accurate records of troubleshooting steps and resolutions.

NOC Technician Datotel (March 2026-now)

• Experience with Microsoft office Outlook, Excel, Word, Access, PowerPoint, TEAMs
• Assisted with onboarding new employees by setting up user accounts, devices, and system access even with active directory.
• Delivered customer-focused technical support through phone, email, and in-person interactions

• Monitor network infrastructure and respond to alarms, outages, and service-impacting incidents.
• Troubleshoot routing, switching, and connectivity issues within a 24/7 NOC environment.
• Escalate and document incidents using ticketing systems and operational procedures..

• Supports and assists with the operation and management of the Datotel IT and IS infrastructure and systems including LAN, WAN, phone systems, etc.
• Work closely with other departments/customers collaborating with other IT staff for requirements gathering and cross-functional tasks and issues.