Dr. Marwan Nader is a Senior Vice President and TYLin’s Chief Bridge Engineer. He has over 30 years of experience in long-span bridge design and construction. His global bridge expertise extends from his hometown, San Francisco, where he is the Engineer of Record for the San Francisco-Oakland Bay Bridge, the world's longest self-anchored suspension bridge located in a seismic zone, to the Philippines, where he is the Chief Engineer for the Bataan-Cavite Interlink Bridge Project. This 32.15 kilometers-long Manila Bay crossing consists of approach roads, marine viaducts, and two signature cable-stayed bridges, the longest span length of which is 900 meters. Marwan is a recipient of ASCE's Arthur Wellington Award. In 2014, he was selected as the Distinguished Alumni of the Year by the American University of Beirut. In 2015, he was inducted to the Academy of Distinguished Alumni at UC Berkeley. Marwan was appointed to UC Berkeley's Civil and Environmental Engineering Advisory Council, a committee of professional engineers, leaders in business and higher education, and government/policy officials dedicated to furthering the important role of engineering education and research. In 2016, Marwan received the IABMAS Senior Prize in recognition of his contributions to the field of bridge engineering.

Experience:
      Development of prestressing cable systems and the Marketing for 

           domestic and overseas for more than 30 years

      Development of high strength reinforcement steels and the design method for 

           concrete building structures from 1987 to 1991

Academic Society :

      Member of the fib “International Federation for Structural Concrete”,    

            Commission 5 – Reinforcements

      Member of JPCI “Japan Prestressed Concrete Institute”, Committee on

            International Relations

Overseas experience :

       Guest engineer in DYWIDAG-SYSTEMS INTERNATIONAL GmbH, 

          in  Munich/Germany for one year in 1992

Education:

      Master degree in Civil engineering(Concrete structure and material),

            Graduate school of Kobe University, Hyogo (March 1987)

      Bachelor degree in Civil engineering, Kobe University (March 1985) 

Werner Brand is a stay cable specialist with international expertise throughout all project phases starting from conceptual design until repair and strengthening of cable supported structures.

After his study of civil engineering at the Technical University of Munich, he joined the Technical Department of DYWIDAG in 1996 and started with structural engineering of elevated highways in Bangkok. In 1999 he moved to the stay cable department of DYWIDAG-Systems International GmbH and since then he was involved in several hundreds of cable supported structures, such as cable stayed bridges, extradosed bridges, arch bridges, guyed wind towers or roof structures. There he was involved in everything from consultation during the design phase, the tendering phase, project engineering in the construction phase, as built documentation, cable inspection to cable replacement.

Some of the current project highlights are the Gordie Howe International Bridge between Canada and USA which will be the longest cable-stayed bridge in North America and the tenth longest in the world, numerous extradosed bridges in India with record lengths and up to 101 pylons and the Danjiang Bridge in Taiwan, which will be the longest single-pylon cable stayed bridge in the world.

In addition to project engineering, his main interest lies in the research and development of enhanced cable features, such as cable damping, bending filters, cable fire and blast protection, cable de-icing systems, integrated cable illumination, advanced inspection technologies or structural health monitoring concepts.

Werner Brand is also voting member of the PTI stay cable committee, member of the German working group on bridge cables, convenor of the fib task group 5.5 for stay cables, member of the fib commission 5 on reinforcement, member of the fib task group 5.12 on ultra high strength prestressing steel and member in CEN working groups for prestressing steel.

Jeff Liaw has been working with the DYWIDAG Group for 27 years and has accumulated extensive experience in both as a prestressing system specialist involving various bridge post-tensioning to stay cable applications, as well as bridge superstructure construction specialist using balanced cantilever method, segmental launching method, as well as heavy lifting of bridge structures.

Jeff graduated with a B.S. in Civil Engineering from the University of California, Berkeley and completed his graduate degree in Civil Engineering Construction Management at Northwestern University.  He joined Walter Construction (part of DYWIDAG Group) in Vancouver, Canada and worked on several bridge structure retrofit using post-tensioning system and participated on several large powerplant and railway tenders.  Jeff returned to Dywidag-Systems International Taiwan (DSI Taiwan) in 1999 and began his career focusing on bridge construction and prestressing applications.   Throughout his career, Jeff has accumulated experiences in more than 100 balanced cantilever bridges, 15 stay cable bridges, and 6 precast segmental launching projects in over 15 countries.  

In 2021, Jeff Liaw was assigned to take over the DYWIDAG Asia Regional Manager position with the Taiwan office delegated to be the Asia Regional Headquarter managing 12 subsidiaries and licensees in Asia. 

Jeff is currently a Ph.D. student in construction management at the National Taiwan University and an prestressing expert witness advisor to the Hong Kong Highway Department on PT durability and maintenance.

Education and Qualification: 

      Bachelor of Civil Engineering (Distinction), Carleton University, Ottawa, Canada 

      Master of Civil Engineering, Carleton University, Ottawa, Canada 

      Hong Kong Green Building Council (HKGBC), Institutional Member 

      Hong Kong BEAM Professional (BEAMPro) 

Job Positions with VSL Hong Kong Limited (since 1998)

      Design Manager VSL Hong Kong

      Regional Chief Technical Officer

      Senior Business Development Manager (Current)

Job Positions with VSL Taiwan Limited (since 2004)

      Chief Technical Officer

      President (Current)

Work Experience:

      Involved in the Hong Kong construction industry for more than 30 years in a wide range       of building and civil projects. These projects include pre-tensioned and post-tensioned         concrete structures. With more than 3,000,000 m2 of post-tensioned buildings                          comprising of post-tensioned floors, transfer beams and transfer plates, and precast              prestressed concrete construction (beams, planks, and double tees). Civil infrastructure       projects include in-situ span-by-span and balanced cantilever bridges, precast girder             bridges, precast segmental bridges and tunnels, cable-stay bridges. Major                                      infrastructure works include the Hong Kong–Zhuhai–Macau Bridge (HY/2019/09) and         more recently the Cross Bay Link Tseung Kwan O Main Bridge and associated works              (NE/2017/07). In addition to new structures, I am also involved with the repair and                  preservation of existing structures: strengthening, demolition and/or instrumentation         and monitoring.

      Currently interests include the use new post-tensioning material, technology and                    construction methods in building and civil projects, and the use of green construction           material and technology. 

Education: 

      Master of Civil Engineering, Ecole des Ponts et Chaussées, Paris, France

      Bachelor of general mechanics, Ecole Polytechnique, Palaiseau, France

Job position in VSL international:

      Research and development engineer, VSL international

      Technical manager for cable stayed bridge projects

      VSL technology business line management

Work experience:

       Have been starting with research and development on cable dynamics and solutions 

       to  address them, in continuation of works of Dr. Kovacs on nonlinear friction dampers.

       Soon after, introducing these stay cable technologies on major cable stayed bridges

       such as the Incheon bridge in Korea. 

       Later on, in recognition of the growing importance of extradosed bridge designs in

       bridges, did work on the VSL solution of saddle system, worldwide successfully applied,

       and becoming the first full scale tested saddle system, illustrated in the cover page of

       the Bautechnik magazine in Germany.

        I have been involved on the cable system definition for major bridges, such as the 

        Queens Ferry Crossing in UK, the Mersey Gateway bridge, and more recently, the A40

        Duisburg bridge in Germany.

       I am member of working groups about stay cable design and qualifications with tension

       components,  in fib, PTI and Eurocode. 

       I have participated in several critical publications, notably, the latest fib bulletin 89

       recommendation document, the PTI DC 45.1- 18, and the about to be released

       evolution of the EC 3-1-11 for design with tension components.

       I keep sharing my experience through several articles published, mainly about cable

       dampers and saddle development and qualification in fib symposiums,, cable

       connection designs in IABSE, specifics case studies on various conferences and

       publications, and eventually, design with tension components according to latest

       method as proposed on the future release of the EC3-1-11.