Dennis N.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Professional Summary IT professional with 10+ years of experience in network/system administration and technical support. Proven ability to manage, troubleshoot, and enhance IT infrastructures across multi-office environments. Delivered automation solutions and digital systems to improve efficiency and data accuracy. Now expanding skills into Artificial Intelligence, with a focus on automation, data handling, and AI-enhanced solutions. Key Skills & Tools Core IT & Networking: Windows & Linux Server Administration LAN/WAN, Routing & Switching, Firewall Config CCTV Setup, Printer/Hardware Maintenance Microsoft 365 Admin, Active Directory, Google Workspace, Openai, Gemini, anthropic (API – Integration) Systems & Software: SQL Querying, PHP/MySQL Web Systems CRM: SuiteCRM, ERP tools Microsoft Office Suite Amazon EC2, S3, SuiteCRM, WordPress Admin RFID-based Tracking Systems AI – Integration. Openclaw, n8n, opencode, ollama, openai, anthropic, gemini. Voice integration – eleven labs , twilio Professional Experience Network & System Administrator Elite Software and Data Security Inc. | May 2018 – Present Network & Systems Administration Managed network infrastructure including Fortinet firewall and managed switches. Administered Linux servers (CentOS 6 & 7) and cloud systems (DigitalOcean, Alibaba Cloud). Oversaw VMware environments: ESXi 6.0–6.7, VDP backups, vCenter setup, VM replication & cloning. Led Windows & Exchange server administration, including on-premises to hybrid cloud migration. Migrated and supported G-Suite (Google Workspace) and Office 365 (hybrid) environments. Provided end-user support for email systems, directory services, and virtual infrastructure. o Google Admin Console o Google Drive permissions & ownership o Google Vault o License management o GAM (Google Apps Manager) o OUs, feature controls, service enablement Projects & Contributions Developed a PHP/MySQL-based attendance and asset tracking system, reducing manual errors by 70%. Created SQL-based reporting dashboards for HR and Ops teams. Set up and maintained CCTV infrastructure for 3 locations. Initiated automation scripts (Python) for internal file backups and reporting (pilot phase). Built and deployed GPT-based AI assistant for remote clinics to automate front-desk queries and appointment scheduling (reduced manual scheduling time by 50%). Designed resume parser with NLP to match applicants to job roles using AI matching algorithms. Created AI-powered helpdesk assistant using ChatGPT to answer common IT/HR requests. Developed workflow automations using Power Automate to trigger messages/forms for internal teams. Managed Fortinet firewalls, VMware ESXi 6.7, and Linux servers (CentOS 6/7). Migrated hybrid environments (Google Workspace, Office 365) to cloud. Oversaw VM replication, data backup strategies, and system reliability. Integrated multiple LLM APIs (OpenAI, xAI Grok, Google PaLM) into production environments, enabling intelligent prompt-based workflows and application logic generation. Developed and deployed voice AI agents using the VAPI platform for real-time phone call handling and inquiry response, connected to Google Calendar via webhooks and natural language prompts. Built advanced n8n automation workflows powered by local LLMs to perform data scraping, transformation, and pipeline orchestration with minimal latency. Engineered a Retrieval-Augmented Generation (RAG) system using local LLMs to index and search document corpora efficiently for fast and accurate contextual responses. Leveraged programming skills to rapidly prototype internal tools and automate infrastructure tasks using prompt-based software design, reducing manual workload and response time across IT operations.