John Eric Custodio

• Reviewed Issued for Construction (IFC) drawings and technical documents to ensure accurate implementation and
compliance with project specifications.
• Monitored project schedules and evaluated actual site progress against planned milestones, identifying delays and
recommending corrective actions.
• Prepared and updated progress reports based on actual site conditions to support project planning and management
decision-making.
• Reviewed and verified Bills of Quantities (BOQ) for completeness, quantity accuracy, and alignment with contract
requirements.
• Identified scope gaps, design discrepancies, and construction issues through detailed review of IFC drawings, BOQs,
and contract documents; coordinated with stakeholders to resolve technical concerns.
• Coordinated with project management, consultants, and contractors to ensure construction activities were executed
per approved plans, schedules, and quality standards.
• Reviewed and evaluated project documentation, including NCRs, SORs, and IWRs, ensuring compliance with contract
requirements and quality standards.
• Prepared and coordinated contractual responses to contractors' letters, RFIs, technical queries, and project
correspondences.
• Assessed contractor submissions and site documentation for compliance with contract conditions, approved IFC
drawings, and applicable construction standards.

• Performed site inspections of civil works within MRT-7 O&M Buildings, ensuring compliance with IFC drawings,
project specifications, and construction standards.
• Inspected reinforcement installation, formworks, concrete works, structural elements, masonry, and finishing works
to verify quality and compliance prior to construction activities.
• Conducted witness inspections and work verification to ensure QA/QC compliance and correct processing of IWRs.
• Coordinated daily with contractors, consultants, and multidisciplinary teams to resolve site issues and maintain
project progress.
• Identified construction defects, non-conformances, and safety concerns; recommended corrective actions to ensure
quality and timely delivery.

• Supervised all bored piling activities ensuring compliance with approved drawings, project specifications, QA/QC
requirements, and safety standards.
• Verified the suitability of drilling equipment (MAIT 130/180/260, SoilMec RT3) prior to pile installation.
• Supervised temporary steel casing installation using PTC Vibro Hammer 40HD/65HD and casing oscillators for Ø1500
mm casings, ensuring verticality and alignment.
• Monitored borehole depth, diameter, verticality, and eccentricity; calculated drilling lengths per approved foundation
plans.
• Inspected and classified soil samples to verify subsurface conditions against geotechnical investigation reports.
• Performed reinforcement cage inspections (dimensional checks, spacing, cover, welding) for cages up to 70 m in
length.
• Supervised rebar cage installation using 180T and 260T crawler cranes for segmental and single-lift operations.
• Coordinated with surveyors, QA/QC engineers, subcontractors, and project management to maintain quality,
productivity, and schedule.

• Supervised selection and installation of steel sheet piles, ensuring appropriate pile sections, coatings, and interlocking
systems per approved designs and geotechnical requirements.
• Managed all sheet piling operations including equipment mobilization, pile alignment, driving sequence, and
installation activities.
• Monitored pile driving for verticality, penetration depth, alignment, and tolerances; coordinated with surveyors and
QA/QC engineers.
• Conducted inspections to ensure compliance with approved drawings, material specifications, corrosion protection
requirements, and contractual obligations.

• Operated and monitored Koden ultrasonic testing equipment to verify borehole verticality, alignment, and
eccentricity prior to rebar cage installation and concreting.
• Conducted polymer slurry QC tests including viscosity, pH, mud density, and sand content; recommended corrective
actions to maintain borehole integrity.
• Supervised bored pile concreting via tremie pipe method, ensuring continuous placement, proper embedment, and
compliance with approved procedures.
• Performed concrete volume calculations and monitored casting rates to prevent cold joints and ensure complete
slurry displacement.
• Supervised controlled extraction of temporary steel casings during concreting to maintain pile integrity and prevent
necking or segregation.
• Performed reinforcement cage inspections and supervised installation using 180T and 260T crawler cranes.

• Assisted senior engineers in planning, supervision, and scheduling of bored piling works across two concurrent major
railway infrastructure projects.
• Prepared design calculations, piling records, daily progress reports, and QC documentation; monitored drilling, rebar,
and concreting activities.
• Assisted in preparing and reviewing engineering plans, quantity estimates, and technical documentation.
• Contributed to developing Method Statements, construction methodologies, and work procedures for bored piling
activities.
• Prepared and revised AutoCAD drawings, sketches, and construction details for engineering design and site
coordination.

• Supervised installation, inspection, and testing of plumbing and fire protection systems, ensuring compliance with IFC
drawings, project specifications, and applicable codes.
• Conducted inspections of installed piping systems, monitored pressure and leak testing, and verified workmanship
against QA/QC requirements.
• Coordinated daily site activities for commercial building construction, ensuring architectural, structural, and finishing
works were executed per approved plans.
• Monitored architectural finishes installation, coordinated with subcontractors, and resolved site issues for timely
multidisciplinary completion.
• Supervised site clearing and land preparation for SCRP Package 7 Depot; prepared daily progress reports and
coordinated with project stakeholders.