Years of experience: 28

United StatesIT

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Mark's Career Path
Junior Linux AdministratorMar. 2024 -
Present
NHK International CorporationJunior Linux Administrator
• Completed multiple successfully migrations from TrueNAS Core to TrueNAS SCALE, implementing SMB shares and configuring Windows ACLs. • Investigate account lockouts using Graylog to identify patterns of failed logins from network scanning attacks, enhancing security measures to prevent recurrence. • Strengthened endpoint security with Carbon Black by monitoring for viruses, malware, and PUPs...
Systems EngineerOct. 2009 -
Oct. 2023
A2 HostingSystems Engineer
• Assessed and implemented Microcode updates to secure 150 servers from the Downfall vulnerability. • Utilized msr-tools for interim patching of 200 servers susceptible to Zenbleed, pending the release of OS patches. • Improved endpoint visibility by implementing SIEM solution using Wazuh and Elasticsearch. • Introduced FreeIPA, resulting in enhanced authentication and replacing our aging LDA...
Support Analyst Team LeadMay. 2009 -
Oct. 2009
A2 HostingSupport Analyst Team Lead
• Transitioned support staff from two-shift to three-shift system, enhancing coverage and responsiveness. • Addressed and resolved advanced support concerns escalated from Support Analysts. • Guided customers in navigating terms of service challenges by recommending suitable plan upgrades or facilitating terminations, as necessary. • Spearheaded training initiatives for Support Analyst team m...

Mark's Posts

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    How I can help you

    Led seamless migrations from TrueNAS Core to SCALE, set up SMB shares, and configured Windows ACLs. Enhanced security using Graylog, Carbon Black, and WebTitan. Integrated FreeIPA with Active Directory and deployed Wazuh for security monitoring.

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    People I am looking for

    Ideal for small to medium businesses. Seeking clients who need robust Linux administration, enhanced security measures, and efficient infrastructure solutions. Open to various industries and challenges.

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    Experience & Cases

    ISC2 Certified in Cybersecurity. Google Cybersecurity Speciality. Notary Public certification. Previous experience includes work with various employers, applying expertise in real-world settings.

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    How to contact

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