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Leedco Key Personnel



Principal Engineer

Registered Civil Engineer
Registered Structural Engineer
Registered Geotechnical Engineer
Licensed to perform Land Survey

Professional Registrations:
• California (CE, SE & GE), Arizona, Colorado, Hawaii, Idaho, Illinois, Oregon, Michigan, Missouri, Nevada (CE & SE), New York, New Mexico, New Jersey, Texas, Louisiana, Washington, Utah, Idaho, and Virginia.
• Professional Engineer in Korea in the field of Soils-Foundation Engineering

Thirty years of experience in:
• All stages of Civil Engineering.
• Structural and foundation designs with steel, concrete, timber, aluminum and masonry in commercial, industrial and residential buildings as well as hydraulic, earth retaining, power plant and tower structures.
• Geotechnical planning and investigation.

Major projects involved:
• Meadowvale highway overpass, Mississauga, Ontario, Canada
• Green Belt Development Project, Kuwait
• Auxiliary Building at Midland Nuclear Plant (Michigan)
• South Texas Nuclear Projects
• Alvin W. Vogtle Nuclear Project, Georgia
• San Onofre Nuclear Project, California.
• MX missile (ISBM) transportation and deployment project for the U.S. Air Force
• Section No. 3 Superspeed (275km/h) railways (132 miles) associated with numerous bridges and tunnels (1992), Korea
• 39 Unit New Condominium Development in Los Angeles, CA
• Design evaluation and Construction Engineering of Seohae Grand Bridge (1995) worked as a consultant of TY Lin International
• Design of piers, their foundations and abutments of Second New Haengju Bridge in Korea during 1995
• Design of Pylons of Seohae Grand Bridge project which has the largest cable-stayed span and the largest overall bridge length in Korea
• Civil & Structural Engineering of La Habra International Marketplace, La Habra, California
• Geotechnical & Civil Engineering for Weathering Tests of Hyundai-Kia Motors, America, California City, California

The following describe Leedco’s personnel experience in airport design and construction.
AVIATION PROJECTS 1. Project Name William P. Hobby Airport Modifications to Terminals, and Construction of New Concourses, Project No. 417 Project Location: Houston, Texas Client: Dept of Aviation, City of Houston, Texas Project Description: Project includes renovation to existing terminal, and construction of new concourse. Construction Cost: $275 mil. 2. Project Name William P. Hobby Airport Improvement, Project No. 498 Project Location: Houston, Texas Client: Department of Aviation, City of Houston, Texas Project Description Project includes design of the renovation of the Hobby Airport passenger parking garage for ADA compliance, theme signage, general architectural improvements and ventilation; perimeter roads renovation and drainage improvements; runway pavement evaluation and renovation. 3. Project Name Continental Airlines, Inc., at George Bush Intercontinental Airport Aircraft Hangar and Stores Facility Project Location: Houston, Texas Client: Continental Airlines/Burns & McDonnell project Description The hangar was designed for service Continental Aircraft; the wide body aircraft 747-400 and DC-10. The narrow body aircraft bay is designed to service 737-800 or smaller aircraft. 4. Project Name Hangar Renovation, Ellington Air Field Project Location: Houston, Texas Client: Department of Aviation, City of Houston, Texas Project Description: Provided renovation plans and specifications for Phantom aircraft hangar building 5. Project Name Terminal C Renovation, Intercontinental Airport Project Location: Houston, Texas Client: Dept of Aviation, City of Houston. Project Description: Provided plans and specifications for modification and expansion of ticketing area, passenger connecting bridge, waiting area. 6. Project Name Airport Services Complex Intercontinental Airport Project Location: Houston, Texas Client: Dept of Aviation, City of Houston. Project Description: Provided plans and specifications 73,500 sq. ft., warehouse, 35,000 sq. ft., physical plant maintenance building, 18,000 sq. ft., airfield and ground maintenance building, three-bay car washes, six-pump, fueling stations. 7. Project Name Hangar 24, Ontario International Airport Project Location: Ontario, California Client: Lockheed Aircraft Co., City of Ontario. Project Description: Provided plans and specifications for hangar building


Mazen Ayyoub

Vice President of Marketing


Bachelor Degree in political science graduated in, 1979


  • Team Leadership and Mentoring
  • Inventory Control
  • Strategic Planning
  • Sales and Marketing
  • Performance Standards
  • Strong computer skills
  • International business development and  consultant

 For middle east and north   Africa


  • International business development and  consultant

 For middle east and north Africa 

  • Loss Control
  • Customer Service
  • Import and Export experience                                 
  • Team Leadership and Mentoring

  • Cash Handling
  • Retail Sales
  • Inventory Control Systems
  • Incentive Structures
  • Safety and Compliance
  • Procurement experience
  • Retail Stores Operations Implementation

Computer skills

Microsoft word, Excel , Internet navigation capability, Window XP, Window 7,Power point and

Outlook .    

Work History Summary

Leedco Engineers, Inc.'s marketing agent in Middle East including the Republic of Iraq.                     


 English & Arabic Fluently   

Khalid Kouroge, PhD., P.E., CEM, LEED AP        

Vice President & Director of Engineering

·        Education: B.S. Mechanical engineering

                               M.S. Mechanical Engineering

                               Ph.D. Engineering & Industrial Applied Mathematics

  • Over 20 years of experience in consulting engineering that includes design and construction management, and energy conservations for residential, industrial, commercial and federal facilities.

Registered professional mechanical engineer in California, Florida, Kansas, and Colorado

 Certifications: Energy manager, LEED AP, Green Building Engineer.

Experience in civil, mechanical and process design that included municipal and industrial water and wastewater treatment plants, all aspects of layout and installation and inspection of concrete and steel structures, residential and commercial buildings, industrial and municipal water and wastewater  treatment processes and plants, roads, sewer and drainage systems, Mechanical systems, heating, ventilating & air conditioning systems, pumping stations, HVAC, energy management and conservation measures, and building commissioning.


Alexander Benjamin                  

Chief Construction Division

Over 30 years of experience in design, general contracting and supervisory positions that included   residential, industrial, commercial and federal facilities, and as business owner.

Oversee all aspects of the business including general office administration, supervision of employees,   including sub-contractors personnel. Bid and negotiate on work contracts. Work with local, state and   federal officials to ensure regulatory compliance.

 Oversee and coordinate all aspects of layout and installation and inspection of concrete and steel   structures, residential and commercial buildings, industrial and municipal treatment processes and  plants, roads, sewer and drainage systems, utility trenching, roadway, coating and surface   stabilization. Supervise all phases of new construction and demolition of existing aboveground and   underground structures. Supervise hotel renovations.

 Supervise and coordinate on-site activities for new and existing structures including permitting,   scheduling, planning, cost estimating, equipment procurement, with special attention given to layout,   roads, landscapes and erosion control issues. Ensure regulatory compliance. Keep records and plans  of completed projects.

  • Provide direct connection between the contractors and property owners.

 Evaluate payments of quantities for payment purpose. Created progress reports of construction work   performed by several contractors and after the project completion. Also prepared report to keep record   of final amounts of materials used in construction.

 Excellent safety records. Consistently keep workers’ compensation costs exceptionally low.

 Training and licenses: Asbestos supervisor OSHA – 40 hour training, mold remediation, California   General Contractor license B, California contractor painting license C-33, Construction Supervision   training, First Aid & Adult CPR.



Carlos Orralla, PhD.            

Chief Mechanical Engineering Division

 ·        Education: B.S. Mechanical Engineering  

                                       M.S. Mechanical Engineering

                                       Ph.D. Engineering & Industrial Applied Mathematic

Over 25 years of experience in mechanical and process engineering design that includes heavy   Mechanical equipment process and design, HVAC systems design, Piping layout, pump stations,   energy conservation, cooling and heating loads, equipment sizing and selections, heat transfer, computational fluid dynamics, finite element analysis including thermal and structural analysis.

Plumbing and fire protection systems design

Experience in all aspects of construction phase services and management. Resident Engineer for construction projects up to $200 million in construction.


Roy Jumbo, P.E.

Chief Instrumentation and Control Systems Division

Education: B.S. Electrical Engineering

Registered Professional Engineer in California.

Over fifteen years of design and construction management experience in instrumentation control systems, automation, low to medium voltage power distribution, cogeneration, and standby power generation. Oversee the Planning and Design and installation of SCADA and DCS networks, wired/wireless LANs, and fiber-optic networks, in addition to troubleshooting, testing, and commissioning of electrical control systems.

Major projects include:

Design, construction management, and commissioning of Cogeneration power plants in Perris Valley, Moreno Valley, and Turlock, California.

City of Ontario, California Ion Exchange Treatment Plant design, construction, and SCADA integration.

City of Santa Maria, California Water Treatment Plant LAN infrastructure and control system upgrades.


Charles Choi, M.S.

Head of IT Systems and Energy Division

Mr. Choi was born in Seoul, Korea, in l942, and graduated Kyunggi High School in l960.  He entered Seoul National University, Engineering College.  For  the first two years, he majored in Nuclear Engineering there, and later he finished the Engineering College with a degree in Chemical Engineering.

He came to the U.S.A. in l966 to attend University of Idaho, Moscow, Idaho, majoring in Chemical Engineering.  He received a M.S. degree in Ch.E. and his thesis was regarding Heterogeneous Catalysis.

Later in the years of 1971-1973, he studied a Ph.D. works at Princeton University of New Jersey, in Chemical Engineering.  His graduate research work was related with the development of heterogeneous catalysts that can be used to control automotive emissions such as NOx and hydrocarbon vapors.

He worked for Esso Engineering and Development Company(Now, ExxonMobile) in the field of oil refining process development and application works.  Later he joined in Exxon Oil Refining Company and mastered various aspects of petroleum refining technologies and processes. His works for Exxon was for a total period of around 7-years for R&D works and plant engineering works.

He also worked for Flour Engineering and Construction Company in California where he was engaged in designing alternate fuel manufacturing processes such as coal gasification, coal liquefaction, synthetic gas processing plants, methanol production plants, shale-oil and tar-sand oil processing projects, etc.

He also worked for Occidental Petroleum and Engineering Company for development of alternate fuel production from solid waste, shale oil, etc. He also got involved in process development of environmentally sound plants to produce synthetic gas and oil, clean coal burning technologies, etc.

Later, he joined a South Korean company called “Daewoo Corporation” as a senior vice present and he worked in their Los Angeles branch office to do sales and marketing of the ships, offshore structures, oil production machineries, sea-water purification barge-mounted plants, modular petrochemical plants for Saudi Arabia, etc. He obtained a lot of experiences in designing and constructing Modular Plants and Modular Buildings.

Later, he formed his own company in Los Angeles area called Western Environmental Engineering Company which was involved in pollution control system design and operation businesses.  His company was actively involved in the air-pollution, water-pollution, and soil/groundwater pollution control businesses in the Greater Los Angeles area.  He obtained a great deal of experiences in Geotechical, and Groundwater system technologies.

In 2008, he joined Leedco as an advisor to the President providing technical and marketing expertise to the company projects, especially for obtaining and contracting international projects for Leedco.



Chief Civil & Structural Engineering Division

Twenty-five years of experience in:
• Structural design of piers, abutments, and foundation 3-D Seismic Design.
• Design of various foundations including microwave antenna towers.
• Structural analysis and design for commercial and industrial structures as well as buildings.
• Earthquake seismic analysis and rehabilitation design for old masonry buildings to comply with new code requirements.

Major projects involved:
• New Haengju Bridge, Korea
• Seohae Grand Bridge: longest cable stayed bridge in Korea having a main span of 470 meters.
• Structural Design of Piers and Superstructures (PC, Post-tensioned approaches and curved ramp) for Kangdong Bridge in Korea
• Taiwan No. 3 Nuclear Power Plant



Chief Architectural Division

Doctor of Structural Mechanics | Master of Civil Engineering

Ten years of experience in:
• Structural mechanics especially the finite element application for structural dynamics.
• Computer Aided Drafting and Analysis on ALGOR, NASTRAN, RISA-3D, STABL 3.0, AutoCAD 2005, SAP IV, as well as in Fortran Finite Element Programming for Static and Dynamic Computation.
• Interpersonal/technical communication in English, Polish, Russian, and German.
• Structural Engineering Design Analyses included structural system modeling and analysis, writing engineering reports, and producing working drawings on commercial structures, major churches, industrial building, and telecommunications towers.

Major projects involved:
• Designing and testing a full line of products for airline interior manufacturers and leading air carriers worldwide at FAA/PMA approved repair station and development / manufacturing facility.