Seasoned Surveyor with 15 years of experience at Boskalis specializing in dredging, reclamation, and Subsea Rock Installation offshore projects. Proficient in Boskalis DredgeView, RockView, Qinsy,EIVA Navisuite, and Kongsberg SIS software with enhances standard GNSS accuracy on hydrographic survey. Engaged in Settlement Beacon Monitoring using Total Station and reclamation progress monitoring using Manpack RTK, Benchmark Leveling, Rinex logging and CMS for heavy equipment Vehicles on land. Skilled in operation, Installation and troubleshooting of Singlebeams Echosounder and Kongsberg EM2040C, R2sonic Multibeams. Expertise in cleaning, processing, Pipe detections, and quality checks of survey data using EIVA, Autoclean, Qinsy Validator and Qimera software. Dedicated to safety and adherence to Boskalis No Injuries No Accident (NINA) guidelines for incident-free work environment prioritization. Philippine driving license Holder.
Hi, I’m
ZHERNAN ACE T. COLLADOS
Olongapo City
Summary
Overview
17
years of professional experience
1
Certification
Work History
Boskalis Philippines Inc.
Project Surveyor
06.2024 - 05.2025
Job overview
- Company Overview: Harbor City Reclamation Project.
- Implemented risk management strategies during fieldwork operations to minimize potential hazards and ensure worker safety at all times.
- Installations of RTK Base station to be used for accurate positioning on site weather for bathymetric or topographic surveys.
- Conducted Rinex logging and leveling every other week for all installed fixed Bench Marks for monitoring of accurate position and elevation on site.
- Installation, monitoring and leveling of Project Tide Guage to ensure real time and accurate tide transmit to all dredging vessel for accurate depth.
- Conducted topographic and boundary surveys for reclaimed sand brought to site for development and progress, ensuring accurate data for planning purposes.
- Conducted Bathymetric and boundary surveys for all Dredging and Re-handling of sand brought by Dredging Vessel to site for development and progress, ensuring accurate volume data for planning purposes.
- Coordinated surveys to establish accurate position and elevation of installed Settlement Beacon of the Geotechnical Personnel's.
- Achieved increased accuracy in measurements using robotic total stations for monitoring Settlement Beacons.
- Coordinated with sandfill master, superintendent for topographic progress surveys of all pump reclaimed materials to the site and provide height references to level man for maintaining correct elevation and survey pipes connections for distance and references in drawing.
- Calibration and data uploading on all crane monitoring system of heavy equipment on site for continuous and accurate work.
- Conducted Joint survey with Client on all Pre and Post construction survey including relevant equipment calibrations, position checks and paper test sheets.
Boskalis Philippines Inc.
Project Surveyor
05.2021 - 06.2024
Job overview
- Company Overview: New Manila International Airport (NMIA)
- Supervised, Witness and Administered Reports of a joint survey with 3rd Party conducting a Hydrographic Pre-survey of the Project Site, Drilling and Installation of Benchmark Used Project Markings and positioning and Temporary Tige Guage.
- Installation, Calibrations and Leveling of Tide guage in Fixed Location for Logging, Monitoring and Vessels use throughout Project Duration.
- Installation, monitoring and logging of fixed location of RTK Base Station for our accurate survey positioning on site.
- Conducted a Topographic Pre Surveys of Existing Land, ponds around the vicinity of the Project Site.
- Administering Survey and Calibration of Single Beam Pre survey, Intermediate and post survey of rivers and other shallow water inside and around the project area.
- Administering Survey and Calibration of Multibeam Presurvey additional scope, Intermediate and Post surveys of all Dredging Area and sand Re-handling around project vicinity, and barrow areas.
- Performed and execute survey quality checks of survey data after data cleaning and processing before sending to all working dredging Vessels for their daily updates and Progress.
- Achieved increased accuracy in measurements using robotic total stations for monitoring Settlement Beacons.
- Conducting daily position and elevation checks on Benchmark, PVD, CDC and CMS to ensure continuous accurate positioning of work without delays.
- Performs Monthly Rinex Benchmark logging, Tide monitoring and leveling to ensure correct depth use by the Dredgers.
- Conducting Topographic Progress survey in all new discharge sand by the dredgers and make elevations references and pipe survey of all sandfill operation and update for Drawing on site.
- Execute settlement plate monitoring around the project vicinity using RTK logging and Total Station including data processing.
- Administering Rock revetment survey with combination of RTK manpack, levelling and crane monitoring system.
- Stayed current on industry trends and technologies by attending professional conferences and workshops, applying new knowledge to improve project outcomes.
- Optimized workflows by implementing advanced software tools for data analysis and processing, resulting in faster turnaround times for deliverables.
- Implemented risk management strategies during fieldwork operations to minimize potential hazards and ensure worker safety at all times.
Boskalis Offshore
Hydrographic Online Surveyor
07.2012 - 01.2020
Job overview
- Company Overview: Subsea Rock Installation (SRI)
- Preparation of all Survey details through our project work package, including vicinity drawing of the new project locations, Projections, heights and Tide available.
- Planning ahead of time on the given details on shipwreck/ known pipes or products for Clients Position Checks requirements. To load all given DTMs in Eiva and Rockview monitor to ensure position is all good and safe for ROV while surveying.
- Performed Calibrations, Maintenances and Preparations of all Transponders to ensure that all are fully charged and ready to use and to be deploy whenever it is needed for additional ROV or Ships positioning especially inside 500 meters zone of the Platforms Combined with Fanbeam, HiPAP, Trimble and CNAV DGPS or for other critical areas.
- Configuration and troubleshoot of GPS Signal and Positioning for smooth Ship & ROV Operation.
- Carrier out Patch Test and other calibrations on R2sonics multibeam, Kongsberg multibeam, to ensure quality and precision of the survey outcome.
- Collaborating With ROV pilot and E&I in Mobilization, interfacing and testing of all survey Equipment into the ROV.
- Administering Hold Scan survey for determination of Volume of rocks loaded/Left in the Cargo.
- Developed strong relationships with clients through consistent communication and timely delivery of results.
- Applied training and mathematical abilities to calculate heights, depths and relative positions of underwater terrain.
Sherbiny for Commerce Est.
Civil Engineer
12.2009 - 09.2011
Job overview
- Assisted and supported Project Manager in coordinating the activities of a projects to ensure cost, schedule, and quality standards are met. Exercised independent judgment related to day- to-day administration of projects.
- Report and Monitor the risk and change in management to the Project Manager on daily progress of the project activities.
- Checked and verified drawings used in the site for construction purpose.
- Assisted Project Manager and obtained pricing for the development of cost estimates.
- Implemented job site safety procedures, notifications, signage, supplies, and equipment.
- Attended weekly project meetings and monthly scheduled meetings and prepared meeting minutes. Coordinate with the other Engineers in the field.
Jan De Nul Dredging Limited / Boskalis Westminster Middle East Ltd. Joint Venture
Project Surveyor
12.2007 - 06.2009
Job overview
- Company Overview: Port Expansion Project in Ras Laffan, State of Qatar
- Mobilization and demobilization of all Survey equipment installed in vessel and Give survey information updates on all vessels involves in the project for safe navigation in precise depths on site and new progress and passage for available new reclaimed area.
- Conducting Survey Equipment Maintenance to ensure good workability and to avoid survey delays due to equipment failure.
- Performs Surveys in dredged site, reclaimed land areas, and processes all seabed high spots, Settlements and breakwaters progress in the Ras Laffan Port Expansion Project.
- Surveys Stockpiles of Sand to determine Volume of Sand for the land reclamation progress.
- Execute cutter and dredge area check for raw progress of the Cutter dredger before advancing their grounds.
- Performed bar check calibration for vessels draught and recorded sound velocity profile before and after the survey.
- Administered single beam and multi-beam calibration for Survey precision and quality.
- Tide Gauge Mobilization, Maintenance and Decommissioning after the project.
- Executed Insurvey, Interim, Outsurvey, and Final Acceptance survey using multibeam Seafloor Information System (SIS).
- Executed Insurvey, Interim, Outsurvey, and Final Acceptance survey using Single Beam.
Education
Columban CollegePhilippines
Bachelor of Science from Civil Engineering
University Overview
Skills
- Experienced in hydrographic survey and techniques
- Skilled in Topographic surveying
- Establishment, monitoring and leveling of geodetic control points
- Establishment, monitoring and leveling of tide gauge
- Monitoring and leveling of Settlement Beacons
- Data quality assessment
- Expertise in instrument calibration
- Effective troubleshooting skills
- Skilled in precise geodetic data collection
- On-site data acquisition
- Effective team collaboration
- Proficient in GPS technology
- Proficient in AutoCAD
- Strong verbal communication
- Effective team leadership
- Adherence to safety standards
Accomplishments
Accomplishments
Completed all (Subsea Rock Installation) Offshore, Dredging and Reclamation projects that i have joined.
Coursework
Coursework
- Boskalis DredgeView II, In-house training
- Boskalis RockView, In-house training
- EIVA Navisuite Navigation and Acquisition Training Course, 2018-01-23, 2018-01-26, EIVA a/s Skanderborg, Denmark
- QINSy Online Course & Qloud Training, 2012-01-31, 2012-02-02, Makati City, Philippines
Professional References
Professional References
- Mr. Ronald Kok, Boskalis Survey Manager, New Manila International Airport, ronald.kok@boskalis.com
- Mr. Niels Geerlings, Boskalis Survey Manager, Harbor City Reclamation Project, niels.geerlings@boskalis.com
- Mr. Dimitri Bonnema, Boskalis Party Chief, Rockpiper Vessel, dimitri.bonnema@boskalis.com
Personal Information
Personal Information
- Date of Birth: 1981-09-16
- Nationality: Filipino
- Driving License: Philippine driving License holder
- Marital Status: Single
Certification
- Boskalis Dredgeview Training - Inhouse Training
- Boskalis Rockview Training - Inhouse Training
- EIVA Navisuite Navigation and Acquisition Training Course - EIVA a/s Skanderborg, Denmark - January 23-26 2018
- QINSy Online Course & Qloud/Qimera Traning - Quality Positioning Services BV (QPS), Makati City, Philippines - 31 January – 02 February 2012.
Timeline
Project Surveyor
Boskalis Philippines Inc.
06.2024 - 05.2025
Project Surveyor
Boskalis Philippines Inc.
05.2021 - 06.2024
Hydrographic Online Surveyor
Boskalis Offshore
07.2012 - 01.2020
Civil Engineer
Sherbiny for Commerce Est.
12.2009 - 09.2011
Project Surveyor
Jan De Nul Dredging Limited / Boskalis Westminster Middle East Ltd. Joint Venture
12.2007 - 06.2009
Columban College
Bachelor of Science from Civil Engineering
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