SYLVESTER Yongho, Regional Head of Structures

SYLVESTER Yongho

Regional Head of Structures

KEO International Consultants

Location
United Arab Emirates - Abu Dhabi
Education
Master's degree, Structural Engineering
Experience
33 years, 11 Months

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Work Experience

Total years of experience :33 years, 11 Months

Regional Head of Structures at KEO International Consultants
  • United Arab Emirates - Abu Dhabi
  • My current job since June 2015

I have the overall responsibility for managing the Structural Engineering Department within the Infrastructure Division of KEO for the GCC Region. As Regional Office Manager, I am responsible for the success of day-to-day operations of KEO infrastructure Division’s Structural Engineers' Regional Office in the GCC area. This position includes Business Development, Group Management, Project Management, and structural engineering responsibilities.

Primary Responsibilities:
· Reports to the Executive Group
· Maintain integration of Regional Office with all KEO offices
· Work with BD Executive to establish and execute Regional Office strategic plan
· Develop and maintain client relationships
· Develop and maintain budget for Regional Office
· Supervise Group Managers in Regional Office
· Provide Group Management/Project Management responsibilities.
· Write fee proposals
· Provide early phase project management/concepts, narratives and kick-off meetings
· Performing preliminary designs, in-house QA/QC, conducting peer reviews, attending seminars, etc.
· Review billing review reports/invoicing
· Reviews Manpower requirements and informs management of the utilization rates.

Principal Structural Engineer - Team Leader Structures at KEO International Consultants
  • Qatar - Doha
  • January 2013 to June 2015

I had the overall responsibility for the design of structures for Infrastructure Division, including bridges, tunnels, car parks, water retaining structures; pump stations, etc. including preparation of proposals

Senior Principal Structural Engineer - Team Leader Structures at Shaw Power Group, Nuclear Engineering Division
  • United States - North Carolina
  • January 2008 to January 2013

My responsibilities included coordinating all structural aspects of Balance of Plant Structures included supervising the design of site specific civil/structural facilities/components associated with various nuclear components and systems, structural analysis and design of nuclear power plant facilities including developing detailed foundation design for major equipment such as steam turbine generators, turbine building, Heavy Lift Derrick Foundations, cooling tower foundations, intake and discharge structures, ID Fan foundations, pipe rack structures and foundations, pumps, tank foundations, and other electrical equipment foundation supports. He also provided support to project management team in engineering studies, organizational/plan staffing, write/review specifications, prepare/maintain schedules, develop/monitor estimates and staffing forecast, work with project/client/construction/ procurement teams in permit and subcontract activities and other civil site related commodities.

Transportation and Infrastructure Consultant at African Development Bank/World Bank/Japan Agency for International Development
  • Zambia
  • March 2010 to December 2011

The Kazungula Bridge Project consists of a 914m long extradosed segmental concrete cable bridge across the Zambezi River between Botswana and Zambia; two one-stop border posts replacing existing border facilities in Zambia and Botswana and roadway/railroad improvements.

The scope of the consultancy services is to perform all relevant activities for the preparation of the project for implementation
i.e. construction. The objective is to ensure the project design complies with the requirements of the Bank.

Specific Duties and Responsibilities:

• Review the design options (concept) and validate the functionality and technical justification for the selection or de- selection of options for the bridge structure with emphasis to be given to key features of the design such as: the ground/geotechnical investigations carried out; the flood/hydrology/flow characteristics of Chobe/Zambezi, the hydraulic impact and earthquake vulnerability. Review the design flood levels against realistic climate change scenarios
• Review and validate the design principles (including rail component) used for the selected bridge option (extra- dosed), the pavement structure for associated roads and border and tolling facilities, to ascertain adherence with general engineering principles
• In collaboration with the Transport Economist and Financial Analyst, review the design against operational and maintenance cost derived by the study to validate the sustainability aspects of the infrastructure
• Review the key components or features of the bridge structure against the practicality of the maintenance regime taking into account availability of expertise and capacity of the infrastructure owner (e.g. maintenance of bearing, strands. etc). Recommendations on maintainability to be proposed, where necessary
• In collaboration with the Transport Economist and Trade & Transport Facilitation Expert, review and validate the functionality of the infrastructure to meet current and anticipated traffic growth
• Evaluate key construction methodologies and activities against the impact on environment. Review the materials proposed in respect of the source (location of burrow pits) and the effect on social (e.g. displacement of people/resettlement) and environment landscape
• Review and validate the concept of construction methodology for the bridge superstructure and substructure to ascertain build-ability and construction challenges
• Evaluate the safety aspects associated with the construction activities particularly, the bridge and approach ramps, making recommendation where necessary. Also review the safety related features of the completed structure under operational conditions to both vehicle and people traffic
• Specific to the railway, review and validate the road/rail interface on the basis of functionality and operational safety
• Appraise the institutional framework at intra- and inter- government level to assess the institutional capacity of the responsible government agencies and contribute the development or design of capacity building initiatives
• Collect and validate baseline data and targets on core indicators to assist in the development of the logical frame work for the Project Concept Note and Appraisal Report
• Carry out any other tasks relevant to the assignment such as providing input for mission aide-memoire, participating in workshops, be available to questions and attend to comments raised during the various review processes, etc.
• Review and validate the capital cost of the project based on the bill of quantities prepared by design, including the unit rates of key items, taking into account the inflationary and price escalation adjustment

Senior Project Manager/Lead Structural Engineer at Shaw Environmental and Infrastructure, Inc.
  • United States - Massachusetts - Boston
  • October 1998 to January 2008

I was responsible for developing project scope of work and execution plans; detailed schedule and estimate including responsible for overall project planning, preparing monthly progress reports, project cost control including procurement schedules. Provided construction support engineering services including shop drawing review, periodic design of field-initiated revisions, responding to field inquiries, and providing guidance concerning the design intent. Other responsibilities included review of falsework, constructability review of viaduct construction sequence for the precast and cast-in-situ balanced cantilever construction.

Senior Lead Structural Engineer at T.Y. Lin International
  • United States - Massachusetts - Boston
  • January 1997 to October 1998

Charles River Cable Stay Bridge, (CA/T Project) Boston, MA, Kiewit/Atkinson Joint Venture ($90, 000, 000.00 Project) Senior Structural Engineer responsible for the preparation of integrated construction shop drawings incorporating bridge utilities, reinforcements, post-tensioning and cables in the struts and lifts 1 to 5 of the south tower and spline beam of approach back spans to which the cables are attached. Other responsibilities included the identification and resolution of conflicts in the post-tensioned strand layouts.

Logan Airport Terminal Area Roadways and Ramps, Boston, MA
Senior Structural Engineer responsible for the redesign of Ramp DTA, a four span horizontally curved continuous cast-in-place post-tensioned multi-cell concrete box girder on drilled caissons. Other responsibilities included the review of shop drawings for other Logan Airport terminal roadway ramps including the redesign of transverse post-tensioned tendons for end beams, straddle bents and bent caps. The project involves upgrading the airport roadways including construction of a new, upper-level roadway system servicing the departures-level of the passenger terminals. These new elevated roadways consist of nearly 6, 000 linear feet of cast-in-place, post-tensioned concrete box girder viaducts that connect to a new interchange with Interstate I-90 to the west.

Project Highlights:
• The use of external post-tensioning tendons within the box girders achieved greater structural efficiency and lower construction costs
• Foundations were designed primarily as 7- and 8-foot-diameter drilled shafts to avoid subsurface impacts with utilities and to reduce construction costs
• Structural design was closely coordinated with mechanical, electrical, and highway design disciplines to accommodate fire suppression, emergency communication, lighting, overhead signing, and incident management facilities in the airport's upgraded roadways system
The variable-width viaducts have numerous exit and entrance ramp connections and continuous curvilinear alignments, which preclude the use of precast segments. The trapezoidal box girders are 6.5 feet deep and include both single-cell and multi-cell configurations, depending on the roadway width. Span lengths vary but mostly extend to 160 feet. The monolithic top slab is post-tensioned transversely, permitting the use of large, 6-foot overhangs on each side that streamline the appearance of the viaducts and provide the modern aesthetic desired by the owner. Predominantly supported on tow-column bents that straddle the lower roadway, the new viaducts were designed to be constructed in stages to accommodate maintenance of traffic during construction.

Senior Structural Engineer at ASEC Corporation
  • United States - Massachusetts - Boston
  • January 1994 to January 1997

Design Engineer for Ramp F Tunnel. Other responsibilities included the preparation of construction plans. I also acted as the reviewer for the design of Ramp D Tunnel. Both Ramps F and D are cut and cover tunnel structures. both are tar of the Central Artery/Tunnel - Contract C09C1 - I-90 /I-93 Interchange, Boston, MA

Design Engineer responsible for the design of the South Boston Piers Transit Way Tunnel, Boston, Massachusetts, Maguire/Harris Joint Venture
The South Boston Piers/Fort Channel Full Build Transitway Project consisted of a 1.5-mile underground transit tunnel from Boylston Station to the World Trade Center combined with surface bus operations that link the South Boston area with regional mass transit services in downtown Boston. Five underground Transitway stations and numerous surface bus stations were constructed in order to provide connections to all the Subway Lines, commuter and inter-city rail and bus services, as well as to provide bus service to Logan International Airport. Construction of the Full Build Bus Rapid transit project was staged. The initial phase was the 1.0-mile tunnel segment which utilizes 32 dual-mode, 60-foot low floor, hybrid diesel-electric articulated buses from South Station to the World Trade Center and Logan Airport with three underground Transitway stations at South Station, the Federal Courthouse/Fan Pier, and the World Trade Center. I was the Structural Engineer responsible for the
preparation of a second set of design calculations for sections CCO2A and CCO3A of the Transit Way tunnel. Additional responsibilities included the preparation of construction plans and cost estimates for CCO2A.

Structural Engineeer at Massachusetts Highway Department, Bridge Design Section
  • United States - Massachusetts - Boston
  • June 1990 to January 1994

Structural Engineer responsible for the design of bridges, including design review of Bridge Consultant submittals.
I was also involve in bridge Inspection and Overload Analysis.

My responsibilities also included the inspection and rating of numerous bridges including: steel, prestressed concrete, masonry arches, steel-box girder bridges, movable bridges (bascule) and post-tensioned segmental and cast-in-situ concrete bridges. The bridge rating
programrating consisted of determining the safe load carrying capacity (Inventory and Operating )of the bridges and determining if specific legal or overweight vehicles can safely cross the structure and determining if the structure needs to be restricted and the level of posting required. Among the software programs used by the State was the AASHTOware software programs like Virtis for rating analysis and PONTIS for bridge management system. The PONTIS bridge management system was used to maintain records not only for individual bridges, but
was used tocombine the records of all bridges within the state inventory and was able to keep track of the maintenance cycle for each bridge

Other inspection types performed included Fracture Critical Inspection. This was performed mostly on steel arch and truss structures. The inspection focused on tension and stress reversal zone of fracture critical members and fracture critical connections such as gusett plates, stiffeners, box-beam-to-column intersection, welds between plates and beam flanges, pin and hangers and eyebars.

Education

Master's degree, Structural Engineering
  • at Northeastern University
  • June 1991

My Master's Thesis was on the Use of Mathematical models to predict Crack propagation in composite materials.

Bachelor's degree, Design and Civil Engineering
  • at Texas Tech University
  • December 1988

Master's Thesis was on the use of mathematical models to predict crack propagation in composite materials

Specialties & Skills

Seismic Design
Concrete
Steel Structures
Structural Design
Project Management
Quality Assurance
Power Plant Structures
Infrastructure and Transportaion Desgn
Proposals
Construction/Remediation
Health and Safety
project management
MS office
Seismic Design

Languages

English
Expert

Memberships

ASCE
  • MEMBER
  • June 1995
AISC
  • MEMBER
  • October 2000
American Nuclear Society
  • member
  • September 2013

Hobbies

  • SOCCER