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System Administrator I work with virtualization, self-hosted services, storage and backups and on-premise cloud infrastructure. 🔹 Areas of Expertise: Virtualization 🔹 Proxmox HA clusters with Ceph storage for redundancy and scalability. 🔹 FreeBSD with vm-bhyve hypervisor. 🔹 XCP-ng. Networking & VPNs 🔹 Setting up and managing MikroTik and pfSense firewalls. 🔹 Configuring Wireguard and OpenVPN solutions for remote access across businesses. 🔹 GL-iNet travel routers for Digital Nomad VPN solutions. Self-Hosting & Custom Server Solutions 🔹 Managing self-hosted applications like Nextcloud, Seafile, and WordPress and others. 🔹 Configuring Nginx and Apache servers for web hosting. NAS & Storage Solutions 🔹 Setting up and managing TrueNAS, Synology, and Unraid. 🔹 Configuring ZFS-based storage solutions for redundancy and performance. 🔹 Implementing NFS, and SMB shares. Storage & Backup Strategies 🔹 Implementing Rsync, Rclone, and Syncthing for data synchronization and backups. 🔹 Managing ZFS-based storage for redundancy and backup. Remote Access & Virtual Desktop. 🔹Apache Guacamole, KasmVNC, NoMachine. Cloud 🔹 Working with AWS and Oracle Cloud. Technical Expertise: 🔹 Operating Systems: FreeBSD, Ubuntu, Debian. 🔹 Virtualization & Containers: Proxmox, vm-bhyve, XCP-ng, Docker. 🔹 Networking & Security: MikroTik, pfSense, WireGuard, OpenVPN. 🔹 NAS & Storage: TrueNAS, Synology, Unraid, ZFS, NFS, SMB. 🔹 Storage & Backups: TrueNAS, Synology, Unraid, Rsync, ZFS. 🔹 Web & Cloud Services: Nginx, Apache, AWS, Oracle Cloud.

US-Based. Ex-Google Senior Systems Engineer. I have over 25 years of running Linux infrastructure, websites, system administration and technical services. I can help with: * Linux server troubleshooting, setup & security (CentOS, Ubuntu, Alma, Rocky, etc.) * Apache & nginx web servers * MySQL & MariaDB SQL servers * Email services (dovecot, exim, sendmail) * PHP, Golang, Python programming, Bash scripting * SSL certificate issues * DNS issues * Wordpress issues * Server & website migrations. * VPI/PBX: Asterisk, Kamailio, Twilio, etc. * Compiling software * Web hosting control panels (including cPanel/WHM, etc) * GCP & AWS management * Networking: VPNs, VLANs, routing, switching, DHCP, PXE, BGP, etc * SRE, Devlops, monitoring & logging, etc. After running a web hosting company for 17 years and then working as a systems engineer at Google for 7 years I am now ready to help you with your internet & website infrastructure. I live in the US, work in the Eastern Time Zone and I am available via email, WhatsApp, phone or video calls. If you need a trusted partner to work with your website or infrastructure, then look no further :)

Independent Systems & AI Consultant April 2009 – Present Provide high-end cloud architecture, server tuning, critical-incident recovery, and modern data engineering services to global clients. Completed 140+ engagements on Upwork with a perfect 5.0/5.0 feedback rating. AI Data Pipeline & Serverless Warehousing (2025 – 2026): Engineered a serverless data catalog pipeline using Python (BeautifulSoup, requests) to automatically scrape, parse, and clean investigative articles from target web sources [1]. Structured the raw extracted payload into optimized Apache Parquet tables and deployed them directly to Hugging Face Datasets for serverless hosting [1]. Built an interactive search and query dashboard in Gradio, utilizing custom DNS records (ALIAS/CNAME) to map and serve the app securely on DigitalOcean's cloud. Cloud Infrastructure & Migrations (AWS EC2 / VPS): Architected and built high-availability Linux cloud servers on AWS EC2, configured with WHM/cPanel, Concrete5 CMS, and optimized PHP environments. Successfully migrated legacy physical dedicated servers to scalable Virtual Private Servers (VPS) with CentOS/RHEL. Critical System Recovery & Administration: Diagnosed and resolved emergency service outages, including JBOSS server crash failures, Plesk/cPanel software conflicts on legacy CentOS nodes, and data recovery via mounting RAID arrays on FreeBSD. Configured Snort IDS, hardened server network boundaries, and conducted end-to-end performance audits. UNIX Engineer | E Solutions Corporation March 2008 – April 2009 (1 year 2 months) Supported physical operations and infrastructure for a Tier-1 collocation facility. Administered and engineered OpenBSD, FreeBSD, Linux, and Windows server environments daily. Identified and successfully resolved a high volume of network and host-based security vulnerabilities. Stabilized the physical bandwidth billing system for accuracy and provided system-level engineering support to the web development team. UNIX System Engineer | Hilton Grand Vacations (HGVC) November 2006 – March 2008 (1 year 5 months) Served as the single onsite point of operations for all HP-UX, Solaris, FreeBSD, macOS X, and Linux servers. Enterprise Data Warehouse (EDW) Architecture: Designed and built a custom corporate Data Warehouse using RedHat Enterprise Linux, IBM Information Server, and the Sun N1 toolkit. Backported RedHat clustering utilities and GFS modules specifically for RHEL 4 to support database stability. Tailored operating systems to run the IBM Information Server 8 product family, including IBM DB2 V9.3, WebSphere 6.0, DataStage, and QualityStage. Web Presence Engineering: Designed and deployed the company's external web servers on the Solaris 10 platform using Sun T2000 hardware. Leveraged Solaris Zones, hardware RAID, and the ZFS filesystem to isolate and optimize traffic. Authored custom system automation utilities in Perl, C, and the Bourne shell to debug complex kernel and network issues. UNIX Administrator | Vortech, Inc. 2004 – 2006 (2 years) UNIX Administration & Support | Magna Computer Corp September 2003 – May 2004 (9 months) UNIX System Administrator & Network Engineer | Independent Consultant November 2001 – July 2003 Implemented OpenBSD, Linux, and Windows servers in high-density colocation centers. Configured custom web application servers from scratch using Apache, Perl, PHP, and MySQL. Programmed terminal-based console utilities in C and ncurses, utilizing the GTK toolkit and X11 API. Second Level Support | Jobwarehouse May 2001 – September 2001 (5 months) Provided secondary engineering support for primary web servers and high-volume data processing tasks. Education Valencia Community College | 1996 – 1998 | Computer Science & Systems Study Winter Park High School | 1992 – 1996 | Gifted Academic Program Professional Recommendation "Aaron is a very good systems engineer for Linux, UNIX and Windows. He has an in depth understanding of system internals. I found him to be an honorable man that stands behind his word and keeps on track of the project. He would make a good supervisor in any company." — Shelton R., Sr. IT Consultant / DB2 DBA Expert, Xtivia (worked directly with Aaron at HGVC)

Linux Systems | DevOps | Security | Incident Response | Log Analysis I help businesses quickly identify, fix, and prevent server issues across Linux and Windows environments. I specialize in troubleshooting, log analysis, and incident response for real-world problems like outages, security risks, and misconfigurations. I have 10+ years of hands-on experience supporting production systems, including incident response, log analysis, and infrastructure hardening. I recently completed a forensic log analysis project with a 5-star client rating, delivering a structured, evidence-based report identifying login activity and connection behavior. Recent work includes: - Digital forensic log analysis (application, service, login, and connection logs) - Discourse deployment using Docker with full SMTP, DNS, and HTTPS validation - Server recovery, malware cleanup, and security hardening What I can help you with: - Log analysis and incident investigation - Linux server troubleshooting and performance issues - Server recovery and security hardening - Docker deployment and fixes - SMTP / email delivery issues (SPF, DKIM, DMARC) - WordPress security and recovery - Firewall, SSH, and system hardening I focus on root cause, not temporary fixes. I document clearly and leave systems stable, secure, and production-ready.

I'm C/C++ software developer. 6+ years of cross-platform software development, experienced in creating & debugging complex commercial software. Life cycle advanced user of deb/rpm based Linux distributions. Experienced with Linux, Windows, Mac OSX, Android operating systems. Key Skills: ★ C/C++ programming languages. ★ QT Cross platform framework. Additional Skills - Script Languages, Frameworks, Libraries, Software: ★ FFMPEG, OPENCV, MPV ★ Bash, GNU Make, CMake ★ Standart Template Library - STL ★ WinAPI, FLTK, Xlib, Xrecord, libqt, portaudio, libao, Cocoa. ★ GDB, Valgrind, VirtualBox, GIT, Qt Creator, Qt Designer. ★ Binance API, Pine script. I have all necessary hardware & software to prepare cross-platform builds and tests: ✴ Windows, MAC osx. ✴ Linux distros and free space to add necessary OS. ✴ Raspberry Pi 2. ✴ Android devices. Github account: github.com/AlexanderAgd

## BIO Over 25 years of experience in IT. Over 20 years experience as Systems/Network Administrator for Internet Service Providers. Designed and implemented networks, including WANs, LANs utilizing wired and wireless technologies. Provided server administration for production SaaS website and eCommerce sites, including PCI DSS security compliance. ## Area of Expertise Operating Systems: Linux, FreeBSD, OpenBSD, RedHat, CentOS, Debian, Ubuntu, OpenSuSE, Windows Server (2000-2008). Routers: Mikrotik, Linux, low-end Cisco, SoHo routers. Networking: wireless, wired, LAN, WAN, switches, cabling. Server Software: Apache, Sendmail, postfix, DNS, bind, dovecot, courier, email, mail server, pop3, IMAP, WordPress, Joomla, bash, shell scripting.