• Developed work plans & job hazard analysis for the crews to follow. Construction work of four train station includes foundations, CMU & RC walls, stairs, structural steel, pedestrian bridges, platform girders, expansion joints, bearings, firestopping systems, balustrades, light gauge/dry wall framing, elevator, escalator, service posts, canopy fabric…• Supervised in-house crews, subcontractors and coordinated work activities across different disciplines• Developed project schedules & three-week schedule to track progress & update management • Conducted field quality control inspections to ensure work is in compliance with plans & project specifications.• Monitored project budgets, reviewed crews’ timecards, & tracked production rates. • Estimated quantities, materials cost, equipment, & man hours to determine productivity rates & forecast cost • Performed on-site investigations & provided as-built condition assessments • Prepared nonconformance deficiency reports (NCR) & submitted repair procedures to EOR• Performed constructability reviews & collaborated with engineer of record for alternate cost-efficient design details • Verified quantities, materials costs, equipment, & forecast labor man hour to maintain project budget cost • Performed quantity take offs & procured permanent/consumable material and tools • Prepared shop drawing, submittals & RFI’s & submitted to engineer of record • Designed temporary concrete formwork and temporary shoring, and prepared shop drawing in CAD• Prepared critical lift drawings for single and tandem crane picks in CAD 2D/3D for lifting pedestrian steel bridge & structural members, hollow core planks, equipment, and platform girder canopy

• Supervised rail track crews’ daily activities; inspected project sites to monitor progress & ensure conformance to design specifications, safety standards, & productivity goals.• Performed final alignment and superelevation inspections • Performed thermite welding inspections• Managed three-week look ahead schedule

• Supervised overhead conventional gantry erection crew & launching operations from span to span • Analyzed survey reports, maps, drawings, plans, specifications, contractual documents, aerial photography, and geologic data to plan upcoming work. • Performed erection and welding inspections of temporary steel falsework & EFCO towers.• Maintained daily records of quality, production rates, manpower, weather, and incidents in accordance with the company’s procedures and project requirements. Forecasted the three-week look ahead gantry schedule• Stressed longitudinal PT tendons & temporary PT rods. Measured & verified elongation is in accordance with the specified design stressing and elongation limits.• Prepared critical lift drawings for crane picks in CAD 2D/3D for rear feeding of segments & erection of temporary false• Performed on site data gathering and analysis to monitor noise and vibrations levels using seismographs

• Supervised post tensioning & grouting crew. Tracked crew daily productions, quantities, and man hours • Performed daily stressing, air testing, grouting, & pour back inspections of transverse PT tendons• Inspected PT systems installation in pre-pour & assessed post-pour PT systems conditions • Repaired transverse & longitudinal PT systems in precast segments • Managed & tracked PT components inventory & scheduled material deliveries • Ensured stressing equipment is ready & calibrated to execute & meet the production schedules • Measured & verified elongations & stresses of PT tendons are in accordance with specified design stresses & elongation limits. Prepared & submitted stressing report to Engineer of Record (EOR)

• Managed short-line match casting production lines for typical and pier precast segments • Developed work plans with superintendents and activity hazard analysis (AHA) for the crews to follow• Performed pre pour concrete field inspections for placement of reinforcement, post tensioning, embeds are casted per approved design, shop drawings, and within design tolerances & project specifications • Performed post pour concrete inspections & implemented improvements to prevent similar future deficiencies • Classified deficiencies and prepared nonconformance reports with repair procedure method • Trained engineers in a supervisory capacity to take over similar tasks• Maintained daily records of quality, production, manpower, weather, and incidents in accordance with the company’s procedures & project requirements.• Conducted small unmanned drone flights to monitor construction progress & existing layout conditions• Prepared equipment purchase orders • Prepared submittals & RFIs • Prepared As-built drawings of casting plant for existing casting layout, drainage, electrical systems• Prepared modification rebar Jig drawings to match design drawings

• Analyzed bid drawings, project specifications to prepare material takeoffs, labor cost, & schedule • Prepared quantity takeoffs and labor cost estimates for heavy civil and marine projects • Consulted with vendors, personnel in other departments, superintendent/engineers to discuss and formulate estimates and resolve issues• Prepared estimates used by management for purposes such as planning, organizing, and scheduling work• Prepared engineering drawings & animated construction presentations for means & methods of work sequence

• Performed load distribution analysis and designed framing layout for commercial and residential buildings • Developed Excel Macros formulas to check structural steel Beam-Column bolted/welded connections • Designed post-tensioned beams and parking structure slab • Obtained preliminary design results, schedules and cost estimates • Developed bid proposal for parking structure and digitized takeoffs estimates • Prepared site grading civil engineering plans • Constructed and documented 3D CAD models in AutoCAD Revit • Prepared engineering drawings and construction details in AutoCAD• Submitted & processed engineering plans with City of San Diego Building Department • Organized contactors’ work schedule and oversaw work progress and completion

o Developed floor plans in AutoCAD for UCSD buildings after measuring new structural components at site o Organized & upload drawings on UCSD facilities websiteo Validated accuracy of As-Built” engineering drawingso Met weekly with campus CAD manager to discuss current taskso Composed formal letters to department contacts to schedule visits and meetings

o Mentored robotics classes & summer camps for students 4-16 years old through integrating academic subjects such as math, physics, & programming with real projects & workplace competencies in an entertaining wayo Designed challenges related to everyday life to test the students’ abilities to build stable structures & test their understandings & capabilities to measure, calculate, & program