Open To Work
Daniel Sim
Camp Verde,AZ
Work Preference
Summary
Experienced IT Security Administrator skilled in incident response, vulnerability management, and malware remediation. Proven ability to enhance threat detection and intrusion detection capabilities.
Overview
3
3
Certifications
29
29
years of professional experience
Work History
IT Security Administrator
Excelion Partners LLC (Fleet Farm Contract)
Camp Verde, Arizona
05.2022 - 04.2026
- Investigated and remediated malware detections with CrowdStrike Falcon and Carbon Black Cloud
- Audited Carbon Black against Active Directory to ensure all systems in domain have endpoint protection installed
- Migrated Windows, Mac, and Linux systems to CrowdStrike Falcon, enhancing endpoint security across platforms
- Managed exclusions in CrowdStrike Falcon and Carbon Black Cloud, ensuring seamless operation of approved applications
- Deployed Zeek sensor at network perimeter to monitor ingress/egress traffic
- Analyzed Zeek logs with Rita and AC Hunter for signs of malware beaconing
- Deployed Nessus Scanner and scheduled weekly vulnerability scans on in-scope systems to ensure PCI-DSS compliance
- Identified vulnerabilities from Nessus scans and collaborated with System Admins for timely remediation
Sr. IT Security Engineer
Charles Schwab & Co
Phoenix, AZ
05.2014 - 07.2020
- Primary subject-matter expert for RSA NetWitness Logs and Network
- Configured recurring threat intelligence feeds to enhance NetWitness with up-to-date malicious IP/domain metadata
- Deployed NetWitness syslog templates to send desired metadata to syslog servers and Splunk SIEM
- Primary subject-matter expert for Cisco Stealthwatch
- Configured Stealthwatch host-group monitoring to proactively identify suspicious network activity, including data exfiltration and insider threats
- Executed installations, upgrades, and patching on NetWitness and Stealthwatch servers to ensure optimal performance and security
IT Systems Administrator
Apollo Education Group
Phoenix, AZ
02.2011 - 02.2014
- Created administrative user accounts in Active Directory and provisioned privileged access using role-based access control
- Provisioned access to Unix/Linux systems with Unix-enabled Active Directory groups
- Collaborated with development teams and created custom team roles in Active Directory based on access requirements
- Created application service accounts with delegated Active Directory permissions based on account requirements
- Redesigned role-based access control model to allow greater flexibility and improve auditing capability
IT Systems Engineer
Arizona Attorney General's Office
Phoenix, AZ
02.2008 - 02.2010
- Primary domain administrator for the Active Directory domain of the Arizona Attorney General's Office (azag.gov)
- Installed and maintained SUSE Linux Enterprise servers supporting Oracle databases and Apache web servers
- Deployed and configured Microsoft Windows Server 2008 for roles including domain controllers, file servers, and DHCP servers to enhance network functionality
- Built and deployed Microsoft failover clusters to implement highly available MSSQL server databases
IT Systems Administrator
Hewlett-Packard Inc.
Sacramento, CA
03.1997 - 02.2006
- Installed network operating systems including Microsoft Windows, HP-UX, and Linux to ensure reliable system performance
- Designed and deployed HP ServiceGuard clusters to maximize availability of customer databases and web servers
- Allocated and configured customer SAN attached storage to maximize performance and fault tolerance
- Managed server security and remediated findings using applications like Password Plus and Medusa to enhance system integrity
Education
Bachelor of Science - Electronics Engineering
DeVry University-Phoenix
Phoenix, AZ03-1997
Skills
- Incident response
- Threat detection
- Vulnerability management
- Malware remediation
- Intrusion detection
- Network security
- Endpoint protection
- Security auditing
Certification
- RSA NetWitness Logs & Network Certified Administrator
- CrowdStrike Certified Falcon Responder (CCFR)
- CrowdStrike Certified Falcon Administrator (CCFA)
Timeline
IT Security Administrator
Excelion Partners LLC (Fleet Farm Contract)
05.2022 - 04.2026
Sr. IT Security Engineer
Charles Schwab & Co
05.2014 - 07.2020
IT Systems Administrator
Apollo Education Group
02.2011 - 02.2014
IT Systems Engineer
Arizona Attorney General's Office
02.2008 - 02.2010
IT Systems Administrator
Hewlett-Packard Inc.
03.1997 - 02.2006
Bachelor of Science - Electronics Engineering
DeVry University-Phoenix