Hire the Best PostGIS Specialists
in the United States

Currently a full-time GIS analyst, helping clients meet their business objectives. Looking for that hidden gem or hard to find area? Maybe you have a scientific application or business problem that needs a verifiable solution. Why not retain a highly skilled certified GIS Professional (GISP) and published author with 27 years of experience to get the job done right? Knowledgeable, time-efficient and adept - with 100% client solutions solved wielding GIS technology. Excellent depth of analytical skills fine-tuned by almost three decades of listening to real-world problems and then translating them into solvable GIS problems. Published GIS author; B.S. Environmental Studies; Linux certified. Special interest connecting with data center clients, finding sites co-located with suitable terrain, fiber proximity, cooling water power and population density. Work in the green sector includes solar development (site selection and suitability), identifying buildable land and constraints; finding suitable locations on commercial building rooftops for solar using LiDAR; identifying customer locations and their proximity to electric vehicle (EV) charging stations (alternative fuels). Have worked on many projects needing lead generation. Use of GIS software and county appraiser parcel data identifies both the suitable properties as well as owner contact information. Applied applications of GIS technology to areas such as infrastructure, telecommunications, renewable energy, risk assessment, water resources, road & rail networks, land development and mining. First in the state of Florida to receive agency approval for GIS-based stream bank modeling (other surface waters). Other modeling methods have saved clients enormous amounts of time and money, such as modeling hydrologic features on l in the example of predicting where stream locations are in a 20,000 acre site. Modeled hydrologic features and flood potential in utility corridors. Mapped and managed field data for two 20,000 acre projects and a 10,000 acre project (GPS and GIS data). Expert using GIS desktop software and also developed expertise providing GIS services via web mapping and web services (WMS/WFS). Use open source software on Linux to share GIS data on the web via Leaflet. Available for tutoring or teaching opportunities. Have taught PhD water resource candidate about GIS (ArcMap) data, methods and applications as well as other students in university. Utilize open source software for geospatial analysis and modeling (QGIS and GRASS GIS). Published author in the GIS field, "How to Succeed as a GIS Rebel - A Journey to Open Source GIS; 2023, LocatePress". Topics in geospatial open source technology and the amazing journey over 25 years. Starting with ESRI and evolving to open source software, filled with stories and technical details that can help the beginner or provide guidance to management for enterprise GIS configurations.

Owner of OrcaTech, LLC. With a background in GIS analysis combined with data and software engineering, I am able to deliver services that are automated and scalable to help businesses make more informed decisions. My current service offerings include: - Parcel Intelligence - Site Suitability and Selection - Terrain Analysis - Transportation Logistics - Market Planning - Data Collection - 3D & 2D Drone Mapping - Multispectral Drone Mapping

GIS & Surveying professional with strong expertise in spatial analysis, mapping, and geospatial data integration. I help clients turn complex spatial data into clear insights and high-quality deliverables for planning, engineering, and decision-making. • Spatial Analysis & Mapping: site suitability, land-use analysis, environmental constraints (flood, slope, wetlands) • GIS Data Processing: ArcGIS Pro, QGIS, vector/raster workflows, cartography, and geodatabase management • Automation: Python & SQL for efficient GIS workflows and large dataset processing • Survey & Engineering Support: AutoCAD Civil 3D, plan preparation, coordinate systems, and projection management UAV & Remote Sensing: • Drone imagery processing, orthomosaics, DEM/DSM generation, and 3D modeling • Photogrammetry workflows (Pix4D, Metashape, DJI Terra) • Accuracy assessment, GCP integration, and data validation Remote Sensing Analysis: • Multispectral & hyperspectral imagery processing • Applications in environmental, agricultural, and land-use analysis ✔ Clean maps, dashboards,BuildExperience, and GIS deliverables ready for reports and decision-making ✔ Reliable, detail-oriented, and focused on GIS analysis results

Need an expert in data analytics and spatial storytelling? You've come to the right place! I have 11+ years of experience making maps and dashboards, conducting geo-statistical analysis, and developing efficient workflows for spatial programs. I particularly enjoy using GIS to solve environmental and social challenges, as well as bringing historical and analog maps into the digital age. I am also an accomplished technical writer and would be happy to draft up documentation, help develop curriculums, or compose newsletters and articles for any audience.

From database to UI — I own the whole thing. I write code that ships, scales, and stays clean. I design and build production-ready web applications across the full stack — clean frontends, solid backends, and reliable third-party integrations. Whether you need a product built from scratch, new features added to an existing system, or bugs squashed in a messy codebase, I can own the work end-to-end and deliver it properly. Frontend I build responsive, performant UIs in React (hooks, Redux/Zustand, React Query, Context API) and Vue (Composition API, Pinia, Vuex). I care about component architecture, render optimization, lazy loading, and keeping bundle sizes lean. I write clean, semantic HTML and CSS — no unnecessary dependencies or bloated UI kits where they don't belong. Backend On the server side I work with Laravel and Node.js (Express/Fastify). Laravel work includes Eloquent ORM, queued jobs, scheduled tasks, event broadcasting, policy-based authorization, and API auth via Sanctum or Passport. I design RESTful APIs with proper versioning, rate limiting, validation layers, and consistent error responses. I follow service and repository patterns to keep business logic clean and testable. AI Integration I integrate OpenAI, Anthropic (Claude), and Gemini APIs into real product features — not demos, but functional tools users actually rely on. This includes prompt engineering, system prompt design, streaming responses via SSE, multi-turn conversation handling, and token/cost management. For data-grounded AI, I build RAG pipelines — document chunking, embedding generation, vector storage with Pinecone or pgvector, and semantic search to let models answer accurately from your own content. I also work with basic LangChain setups for chains, prompt templates, and document loaders in Node.js. Chatbot Development I build custom AI chatbots tailored to your business — not generic plug-and-play bots. This covers system prompt and persona design, knowledge base bots that answer only from your documents or website data, multi-turn memory management within token limits, and full chat UIs in React or Vue with streaming output, typing indicators, and conversation history. I also handle platform integrations — WhatsApp (Twilio/Meta API), Telegram, Slack — and build admin panels to review logs, monitor usage, and tune prompts over time. Escalation logic and graceful fallbacks are always part of the build. Map Integration I integrate maps with real functionality — not just embedded iframes. I work with Google Maps API (markers, clustering, custom overlays, styled themes) and Mapbox GL JS (vector tiles, dynamic layers, animations). This includes geolocation, IP-based location detection, Places autocomplete, reverse geocoding, Directions and Distance Matrix for routing and ETA, and geo-radius search using PostGIS or MySQL spatial functions. For logistics and delivery apps, I build real-time tracking UIs with live position updates via WebSockets or polling. Payment Integration I integrate payments the right way — handling edge cases, failures, and reconciliation, not just the happy path. I work with Stripe (one-time payments, subscriptions, trials, proration, invoices, Connect for marketplace payouts, Stripe Tax for VAT/GST) and PayPal (Checkout, Orders API, subscriptions). Webhook handling is idempotent, signature-verified, and queue-processed so no payment event is lost or duplicated. I build PCI-compliant checkout UIs using Stripe Elements and handle multi-currency, dunning logic, cancellations, and upgrade/downgrade flows cleanly. Bug Fixing & Code Rescue I'm comfortable dropping into unfamiliar codebases and diagnosing problems fast. I trace bugs across frontend, API, and database layers to fix root causes — not symptoms. Common work includes resolving N+1 query problems, slow API responses, missing indexes, React re-render issues, broken third-party integrations, and webhook failures. I also handle legacy PHP and Laravel upgrades, deprecated code cleanup, and technical debt reduction. When there's a production fire, I communicate clearly, work calmly under pressure, and get things stable. Database & Infrastructure Proficient in MySQL, PostgreSQL, and MongoDB — optimized queries, proper indexing, and migrations built for zero-downtime deployments. Familiar with Docker, CI/CD pipelines, and deploying to AWS, DigitalOcean, and Laravel Forge/Envoyer environments. I don't pad estimates, disappear mid-project, or over-engineer simple problems. I ask the right questions upfront, communicate consistently, and treat deadlines as commitments. If you need someone who can take ownership of the full stack and actually get things shipped

I have a Bachelors in Geography and Masters in GIS. With 13+ years of experience I can confidentially do any GIS related tasks. Experienced in creating various thematic maps, GIS automatization with Python, 3D modelling, remote sensing (LIDAR, aerial and satellite imagery) etc. I am proficient with ArcGIS Pro and ArcGIS online applications and webmaps including but not limited to ArcGIS Online, ArcGIS Experience and ArcGIS Webapps. I am enthusiastic about what am I doing and always open to new areas. I like new challenges, which can push my knowledge and skills to new levels. "My positions have involved technical program management in university, government contractor, and private business organizations. I have supervised over 100 employees in these organizations and would rank Gary in the top 10%. His self-initiative in learning new techniques and approaches to processing geospatial data is especially noteworthy." TerraSpectra Geomatics