Joshua Guillen
About Joshua Guillen
Joshua Guillen is a Security Engineer with extensive experience in system administration and network engineering. He currently works at Hensley-Elam and Associates and Pueo Business Solutions LLC, focusing on enhancing system security and compliance with DOD regulations.
Work at Hensley-Elam and Associates
Joshua Guillen has been employed at Hensley-Elam and Associates since 2019, serving as a System Administrator and Network Engineer. In this role, he has focused on hardening systems to comply with Department of Defense (DOD) regulations. He utilizes the National Institute of Standards and Technology (NIST) and Cloud Security Program (CSP) frameworks to enhance overall system security. His contributions have been crucial in maintaining the integrity and security of the organization's IT infrastructure.
Work at Pueo Business Solutions
Joshua Guillen has been working at Pueo Business Solutions LLC since 2020 as a Security Engineer. Prior to this role, he served as a SysAdmin and DevOps Engineer from 2018 to 2019. His responsibilities include coordinating the full rebuild of physical servers to facilitate a datacenter migration and developing Ansible playbooks to address vulnerabilities in the Department of Homeland Security's Enterprise Security Operations Center (DHS ESOC) infrastructure. He has also implemented Tenable Security Center scans for continuous risk assessment across all servers.
Education and Expertise
Joshua Guillen holds two Bachelor's degrees from the University of Kentucky. He studied Biology/Biological Sciences from 2009 to 2013 and later pursued Information Communication Technology from 2017 to 2019. His educational background provides a strong foundation for his current roles in IT and security engineering. His expertise includes system administration, network engineering, and security compliance, particularly in relation to NIST standards.
Achievements in Security Engineering
In his role as a Security Engineer, Joshua Guillen has automated patching processes using Satellite with Ansible wrappers, which has significantly reduced manual labor and increased efficiency. He has configured various security agents, including FireEye HX, ForeScout, CrowdStrike, Tanium, Sophos, and McAfee, across production systems to enhance security measures. Additionally, he has created Access Control Lists (ACLs) and domain restrictions to improve security in AWS and Microsoft 365 environments.