Sergiu Sergiu

Versatile engineer with 10+ years spanning geospatial systems, enterprise infrastructure, and field surveying. Expert in the full ESRI ArcGIS stack, qgis, Python automation, and mission-critical system administration across Linux/Windows environments. Proven track record building geospatial databases, automating workflows, and maintaining high-availability financial infrastructure. Passionate about data science, IoT, network systems, and solving complex spatial and trigonometric problems.

System Engineer at ACI Worldwide Romania (2023-01 – 2026-12)

Application On Demand (AOD) division — Managed mission-critical ACI Proactive Risk Manager (PRM) financial infrastructure.

• Administered PRM ecosystems across Azure and ACI Private Cloud (Linux & Windows), ensuring high availability for real-time and near-real-time financial transaction processing
• Maintained Production, DR, and UAT environments with multi-tier architectures including Apache Tomcat, Analytic Gateway (AG), and OEI/PIP interfaces
• Managed middleware stack: Apache Tomcat, IBM MQ, Oracle GoldenGate
• Implemented monitoring with Zabbix and Grafana; used Jira for incident tracking and workflow management
• Provided on-call rotation support for 24/7 mission-critical systems

GIS Specialist at KIER (2018-05 – 2021-05)

Geospatial data management, automation, and mapping for infrastructure and utility projects.

• Python Automation: Built web crawler (Selenium, BeautifulSoup, pandas) to collect geospatial data from multiple sources; created raster filtering scripts by RGB pixel values; automated reverse engineering of vector data from PDF maps using Python and Inkscape
• Database Management: Designed geospatial and non-spatial PostgreSQL/PostGIS databases with relations, domains, and subtypes; authored complex SQL queries with spatial and textual joins
• Asset Mapping: Mapped underground and overground utility assets using ArcGIS Pro; built Python models and scripts for workflow automation
• Data Production: Generated contour levels from LiDAR; created CAD documents from GIS; automated Word file generation for georeferencing
• Web & Mobile: Published maps and 3D scenes to ArcGIS Online; managed mobile tool packages for field workers

GIS Technician at Three Rivers District Council (2018-02 – 2018-05)

• Created geodatabases with domains and formatted attributes for Planning and Transport departments
• Performed batch geoprocessing in ArcMap and Excel data manipulation; built Data Driven Page layouts for automated map production
• Exported web-based maps using QGIS 2.9; produced and maintained digital maps, plans, and attribute datasets

GIS Technician at Cyient Europe Limited (BT Exchange Building) (2015-12 – 2017-12)

Spatial data maintenance, network analysis, and cartographic production for telecommunications infrastructure.

• Key accomplishment: Increased network deployment speed by calculating copper material lengths and creating summary files for new cabinet installations
• Collaborated with Telcordia network engineers using ArcMap 9.2 and BT-PiPER to capture, analyze, and export network data and plans
• Conducted programmatic and manual spatial analysis; created thematic maps and reports for stakeholders

Land Surveyor at P.F.A Tolcea Ovidiu (2013-08 – 2015-10)

• Captured field data and marked coordinates for property limits, construction points, and utility pipes using GPS/GNSS equipment
• Calculated distances, horizontal/vertical angles, and elevations; exported/imported surveying data between GPS and total station equipment
• Created cadastral and topographic plans, longitudinal and transversal profiles; prepared cadastral documents for national land registry and local council
• Key accomplishment: Identified and minimized formatting and topological errors between boundary datasets using ArcMap
• Developed overview and thematic maps using ArcMap and QGIS to visually arrange built and natural environment data
• Designed and maintained MS Access database for project tracking and data management

GIS Technician at S.C. Gauss S.R.L. (2013-01 – 2013-12)

• Contributed to APIA (Agriculture Payments and Intervention Agency) project: georeferencing, digitizing, and data entry for agriculture parcel identification
• Analyzed Very High Resolution (VHR) satellite imagery across seasons to identify crop types and areas; updated national registry databases
• Key accomplishment: Used ArcMap for georeferencing, digitizing, planning, and map production; liaised across departments to facilitate GIS database development

Bachelor's Degree in Geodesic Engineering – Universitatea de Științele Vieții "Regele Mihai I" din Timișoara (USAMVT) (2010-09 – 2013-09)

Mechanical Technician Qualification – Colegiul "Tudor Tănăsescu" (2005-06 – 2009-06)