Network Security Engineer

Cecil Jackson

Cybersecurity / Network Security Engineer

*********@*****.*** • 469-***-****

LinkedIn • Round Rock, TX 78665

Highly analytical and innovative professionals with experience in information security/network security/cybersecurity, including deploying, configuring, and administering Firewalls and other network-based security solutions. I am skilled in securing large internetworks, establishing and enforcing policies, and monitoring access. Proven expertise in managing network firewalls, application firewalls, and intrusion detection prevention systems while managing, designing, and supporting components of the organization’s cybersecurity enterprise environment. Instrumental in architecting, developing, and implementing complex and secure networks. Solid understanding and knowledge of cybersecurity concepts and methods, such as vulnerability assessments, data classification, privacy assessments, incident response, security policy creation, enterprise security strategies, architectures, and governance. Familiar with networking (TCP/IP, OSI model), operating system fundamentals (Windows, UNIX, mainframe), and security technologies (firewalls, IDS/IPS). A well-developed aptitude to articulate complex technical concepts to technical and non-technical audiences.

Areas of Expertise

Cybersecurity Engineering

Project Management

Team Leadership & Training

Network Security Engineering

Privacy Assessments & Security Analysis

Process Optimization

Network System Analysis

Enterprise Security Strategies

Complex Problem Resolution

Technical Proficiencies

Tools & Technologies:

Firewall, Checkpoint, Cisco, SentinelOne Endpoint, Mimecast, Nomic IPS, Attivo, Armais, Rapid7 and Rapid7 Threat Command, VPN, Umbrella, SecureX, Cisco Secure Malware Analytics, Knowbefore PhishER, VirusTotal, NetSkope, Nessus, Wazuh

Career Experience

Berkshire Hathaway Inc. 2015 – 2024

Support/Install/Design/Administrator, Security Engineering

Oversee design and administration of security systems for company networks, including protecting systems from cyber threats, such as bugs, malware, and hacking attempts. Provide technical support in implementing malware scanning and integrating Ripid7 IntSightVM with RiskSense. Introduce and deploy network monitoring software (PGRT) to monitor products for all Servers, Windows, and Linux. Successfully manage Symantec VIP and email and ensure Rapid7 InsightVM agents.

Neutralized cyberattacks by successfully implementing Rapid7 IntsightVM and Threat Intelligence for AD, Checkpoint, Palo Alto Firewall, Mimecast, SentinelOne, and Umbrella, including closing thousands of alerts on Rapid7 Insight.

Secured company from approximately 300K IOCs via Netskope CTE Threat Intelligence.

Drafted a production product on Ephoto to put pictures in O365 and AD and wrote a product on BIBO to disable hourly personnel after changing out.

Volt Workforce Solutions (Raytheon Contractor), Garland, TX 2015

Sr. Network Systems Engineer

Oversaw maintenance of the company's enterprise network, including designing and implementing the company's network infrastructure, and resolving cybersecurity and advanced support issues while leading the junior network engineering staff. Provided departmental support by installing, designing, and administering OS Windows, Red Hat Linux, VMware, HP Servers, Qlogic SAN Switches, and Infortrend.

Optimized networking by administering Cisco Switches, Cisco ASA Firewalls, Mcafee EPO, Active Directory/GPO, DOD System Hardening, FreeRadius, and Bind DNS.

Orchestrated technical support in the development and implementation of network security measures.

TG, Round Rock, TX 2013 – 2015

Sr. Network Systems Engineer

Performed diversified tasks, such as conducting regular network performance tests and delegating networking maintenance tasks to junior staff while coaching and mentoring junior Network Engineering staff. Deployed Brocade SAN Switches, Dell Compellent RAID, and Hitachi VSP as well as Cisco Switches for networking to improve storage.

Significantly improved network security by leveraging expertise in MacAfee EPO, Active Directory/GPO, PCI Compliance, and Windows Hardening.

Streamlined offerings by supporting, designing, and installing OS Windows 2008R2/ 2012/2012R2, Ubuntu Linux, VMware, Dell Blades server, and rack servers.

Raytheon System Company, Garland, TX 1998 – 2013

Sr. Network Systems Engineer

Oversaw telecommunications and network security Domains, including conducting network design, testing prototypes, and orchestrating client delivery. Successfully delivered enhanced routing by managing routing protocols RIP, ATM, OSPF, BGP, IGRP, EIGRP, FDDI, WAN, 1/10 Gig Ethernet, Fast Ethernet, and switched network systems. Facilitated Secure Socket Layer (SSL) web traffic on load-balanced traffic by handling all design, configuration, installation, testing, and troubleshooting. Provided technical support in handling ACLs on network devices, firewall sandwiches, network device hardening, and IDS systems. Streamlined network security operations by designing, configuring, and troubleshooting VPNs on Cisco 6500 WAN Accelerator, Cisco Routers, Cisco ASA Firewalls, McAfee Firewall, and Oracle SunRay.

Optimized systems by configuring switches with STP, VLANs, and Trunks and configuring routing, policy-based routing, network address translation, ACLs, IP, and GRE Tunneling.

Orchestrated technical support in designing, configuring, installing, testing, troubleshooting, and supporting logging, leveraging experience in Security Architecture and Design Domain to optimize network devices.

Improved efficiency by managing McAfee Enterprise Firewalls, Juniper Firewall, Brocade MLX, Fore/Marconi ASX-200BX/100 ATM switches, Fore Power Hubs, and DEC/Cabletron equipment.

Maximized performance by managing TACACS to LDAP user integration and account installations of the Cisco Secure Access Control.

Enhanced user support by providing Level 2/3 network assistance, including Cisco Catalyst 2900 /3500 /5000 /5500 /6500s, Nexus 1000v, and Cisco 2500/ 2600/ 3600/ 4700/ 7200 routers.

Developed applications by utilizing WAN (Wide Area Network) simulators during testing to simulate delay and jitter and test how well the application responds.

Additional Experience

Network Designer II / Officer, MBNA International

Network Engineer Specialist, E-Systems, Garland Division

Systems Engineer, Western Atlas International, Inc.

Education

Master Equivalent in System and Software Process Engineering

The University of Texas, Austin, TX

Bachelor of Science, Business, Minor: Computer Science

Excelsior College, Albany, NY

Associate of Arts, Electronics

Texas State Technical Institute, Amarillo, TX

Licenses & Certifications

Cisco Certified Network Associate (CCNA)

Cisco Certified Design Associate (CCDA

Cisco Data Center Application Services Support Specialist (CS-CDCNISS)

Certified Information Systems Security Professional (CISSP)

Udemy - Certified Information Security Manager (CISM) Domain 1

Udemy - Certified Information Security Manager (CISM) Domain 2

Udemy - Certified Information Security Manager (CISM) Domain 3

Udemy - Certified Mastering Environmental Management Audits: ISO 14001

Udemy - Certified CompTIA Security+ (SY0-701)

Udemy - Certified Mastering NIST 800-53: Essential Guide to Security and Privacy Controls

Udemy - Certified Ethical Hacking + Penetration Testing

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