Caleb Greer Email & Phone Number

Design, implement, and maintain security controls to protect the organization's systems, networks, and data from cyber threats.Continuously monitor security systems, analyze security events, and respond to security incidents in a timely manner.Conduct regular vulnerability assessments and security audits to identify and address security weaknesses.Develop and implement incident response plans, coordinate response efforts during security incidents, and conduct post-incident analysis to improve response procedures.Develop and enforce security policies, standards, and procedures to ensure compliance with industry regulations and best practices.Evaluate, implement, and manage security tools such as firewalls, intrusion detection/prevention systems, antivirus software, and encryption technologies.ACAS Engineer for configuration and conducting of Vulnerability Scanning of all IT assetsForescout C2C Engineer for configuration and administration of Comply to Connect systems Implementing Zero Trust

Lead threat hunter working in internal SOC proactively finding cybersecurity threats indicators ofcompromise using the tactics, techniques, and procedures of APTs to prevent information systemscompromise.• Information Systems Security Officer instituting security protocols and security control validation auditsin accordance with the Risk Management Framework.• Lead Crowdstrike EDR Analyst monitoring system baselines, file executions, network connections, andend user behaviors to detect and eliminate threats. Manage all Crowdstrike falcon agents in detectionof malware, insider threats, and any malicious cyber activities. Develop and deploy detective andpreventative execution policies using EDR management tool.• Lead HBSS administrator deploying McAfee EPO to centralizes and streamline management of hostbased security solutions to prevent execution and spread of malicious software.• Lead Cybersecurity Engineer responsible for deploying and configuration of cybersecurity solutionssuch as packet capture tools (Sentrywire), IDS/IPS (Cisco Firepower/Palo Alto Firewalls), Securityinformation and event management tools (Splunk), Network security configuration tools (Redseal),Vulnerability management tools (Tenable\ACAS), Endpoint Detection and Response tools (Crowdstrike/SeninelOne).• Implement network security using firewalls, IDS\IPS Cisco firepower’s• Assist with the creation, maintenance, and delivery of cyber security awareness training for colleagues• Lead vulnerability analyst using TENABLE NESSUS scanners to perform vulnerability scans toenumerate the vulnerabilities in external\internal systems and to lead IT teams in the mitigation of criticaland exploitable vulnerabilities to enhance cyber defense posture.• Lead cyber forensic analyst responsible for investigation of digital evidence of cyber crime and securityincidents.• Investigate security events and incidents

Manage server operating systems, database administration, web technologies, systems-related projectmanagement and supervising cyber systems.• Support identification, reconnaissance and remediation of vulnerabilities while enhancing capabilitieswithin cyber environments to achieve desired affects.• Install, support, and maintain server operating systems (physical and virtual)• Complete patch management to mitigate critical vulnerabilities• Perform threat hunting by researching threat intelligence feeds to understand attackers TTPs andbehaviors to be more proactive in our network\system defense infrastructure.• Perform incident response protocols when an IOC has been found• Maintain and implementation of regulatory requirements and authority documents to include DODdirectives, NIST Cybersecurity Framework, NIST SP 800-37, NIST SP 800-53 security controls• Perform system hardening and baselining through the implementation of DISA STIGS• Planning, implementing, managing, monitoring, and upgrading security measures for the protectionof the organization's data, systems, and networks.• Configure and ESXI virtualization hosts that are vmware based hosting virtual data centers

Create GPOs using Group Policy Management tool to increase security and manage all IT systems● Managing\Servicing over 1000 physical and virtual Window\Linux Servers● Respond to service outages and interruptions to network operations. Administers server-basednetworked systems, distributed applications, network storage, messaging, and application monitoringrequired to provision, sustain, operate, and integrate cyber networked systems and applications● Regularly upgrade system software as needed for over 30 corporate applications● Create PowerShell scripts for the automation of System Administration and IT Security tasks● Utilizing Identity Management software system ITAC\OIM ensuring that the proper people in anenterprise have the appropriate access to technology resources supporting over 10,000 teammates● Perform system backups\snapshots for all system resourcesLead Technical Writer, responsible for creation of over 100 standard operating proceduredocumentations● Lead Technical Trainer, responsible for the training and progress in system administration, for 12specialist\analyst teammates● Install and configure operating systems and other software and routinely test installed software forglitch detection and other issues● Monitor systems daily utilizing Zabbix and OMI (Operations Bridge Manager) to respond quickly to anysecurity breaches and\or system outages● Resolve DNS and DHCP issues● Utilize IronPort email security appliance to prevent advanced threats, block spam, viruses and enablecorporate email policy enforcement to ensure data loss prevention● Perform Linux\Unix server technical support● Maintain Linux\Unix system access security● Create and maintain network users/permissions● Attend Change Management Approval Boards (CAB), providing SME knowledge on proposed software

Master Of Science - Ms, Cybersecurity Studies

Bachelor Of Business Administration - Bba, Management Of Information Systems