Senior Systems and Network Administrator

I administer FreeBSD systems remotely, with responsibility for system operations, networking, and security patch management.

I maintain GitLab servers running on FreeBSD and contribute upstream FreeBSD patches and ports where appropriate.

I redesigned network infrastructure and provided systems and network administration services for ITAE customers.

I delivered remote technical expertise across FreeBSD, ZFS, network routing, and operational infrastructure.

I founded a freelance infrastructure practice focused on BSD and GNU/Linux systems, network engineering, development, and energy-storage solutions.

I provide expertise in FreeBSD, OpenBSD, NetBSD, Debian, Ubuntu, Cisco, Juniper, MikroTik, Ubiquiti, Wi-Fi, C, Assembly, Pike, Python, and Victron Energy.

I designed global VPN solutions connecting internal infrastructure and cloud environments.

I migrated SRX routing workloads to 10/100G MikroTik infrastructure and implemented professional distributed monitoring.

I operated and transformed a hosting and network platform, including VM migrations to internal ESX infrastructure, storage improvements, Linux-to-FreeBSD migrations, automation, and IPv6 adoption.

I redesigned redundant networking and fault-tolerant NAT, introduced customer Wi-Fi hardware, implemented monitoring and capacity planning, and supported R&D and hosting platforms for WordPress and FreeBSD jails.

I optimized and deployed network monitoring systems and contributed to network automation initiatives.

I also performed research and development activities for network and systems operations.

I contributed to backbone redesign, moving the network from cold-potato to hot-potato routing and improving transit, peering, RIPE operations, IPv4 management, and automation.

I handled DDoS mitigation strategies, network accounting, technical cost-reduction projects, load-balancing expertise, and technical consulting for corporate sales teams.

I secured and rationalized infrastructure, built a small-business server room, and performed physical-to-virtual migrations.

I implemented LDAP and Active Directory integration, migrated firewalls to redundant pfSense systems, automated Linux administration, deployed Observium, and delivered VPN and security operations.

I led an R&D engineering team for official publications involving ANSSI and AFNIC.

I worked on DNS research, connected production and research teams, and designed and developed a web interface for DNSWitness data.

I managed a team of four network and systems administrators and designed SaaS, managed hosting, and security solutions.

I led R&D, customer migrations, presales support, technology partnerships, tender responses, encrypted Layer 2 VPN work, and QoS solutions for low-bandwidth xDSL connections.

I managed a team of developers and engineers and architected cloud-computing platforms covering messaging, networking, storage, and datacenter operations.

I designed a Cisco UCS and Nexus private-cloud architecture, implemented RIPE, peering, IPv4/IPv6 operations, hybrid ZFS and SSD storage, and automated node installation with PXE, Kickstart, and RPM.

I redesigned network, internet-access, firewall, proxy, and trading infrastructure across multiple datacenters and fiber links.

I administered 300 to 500 Linux servers, industrialized Red Hat deployment, deployed compute clusters and monitoring systems, and implemented ZFS file services and anycast DNS, PXE, and DHCP.

I redesigned the backbone from Layer 2 to Layer 3, operated xDSL collection services, and managed datacenter operations.

I deployed strategic ISP services and NetApp storage, supported customers and internal teams, and managed part-time employees and trainees.

I designed and deployed a disaster-recovery plan and administered BEA WebLogic, AIX, Linux, and Citrix systems.

I served as the system and network technology expert within a four-person team and implemented solutions to reduce operational costs.

I architected secure B2B systems and supported load balancers, switching, operating systems, open-source software, and storage platforms.

I led two Pike developers, managed the CAMAS open-source webmail project, and administered industrial web-hosting, webmail, homepage, and B2B platform services.

I secured and improved the reliability of a three-media platform using OpenBSD and Linux.

I redesigned Layer 2 networks, installed backbone infrastructure, managed peering, operated Linux mail and webmail services, and planned production-platform relocation and IP renumbering.

I directed operations for an internet platform and created and deployed a French historical-content internet portal.

I deployed mail, mail-to-fax, firewall, webmail, routing, and associated internet-access services.

I taught C programming to first-year electronics students on a weekly basis.

I implemented mail, internet services, the official website, internet access, Cisco connectivity, and backup administration for the school's network and servers.