| | | | |
| Wakhidin | PT. Indonesia Power Priok POMU | Indonesia | • MLA I |
| Suwoko | PT PJB UP Muara Tawar | Indonesia | • MLA I |
| Darmawan | PT. Pembangkitan Jawa Bali (PJB) | Indonesia | • MLA I |
| Wellington Alves Silva | VALE | Brazil | • MLA I • MLT I |
| Mohamed Abd El-Rady Awad | RITEC - The Condition Monitoring Company | Egypt | • MLA I |
| Cristovao Junio da Silva | VALE | Brazil | • MLT I |
| Jhonny Modesto Lopez Mavila | Confipetrol Andinas S.A. | Peru | • MLA I |
| Muhammad Arif Haiman Mohd Marzuki | Unknown | Malaysia | • MLA I |
| Aurelio Ivanovich Ruiz Chaponan | Spartan Distributors Srl | Peru | • MLT I |
| Joery Van Nerum | Icare | Belgium | • MLT I |
| Rahul Vashisht | Indian Oil Corporation Ltd | India | • MLA II |
| Vibhor . | Tata Steel | India | • MLA III • MLA II |
| Suwew A/P Thavil | Metalux Oil Analysis Sdn Bhd | Singapore | • MLA I |
| Viggo Aanonsen | MHWirth | Norway | • MLA I |
| Rodney lee Aastrom | Basin Electric Power Cooperative | USA | • MLA II |
| Mohammad Aatif | Baker Hughes | India | • MLA III • MLA II • MLT II • MLT I • MLE |
| Mohd Khairi Asyraf Ab Hamid | Bumi Armada Berhad | Malaysia | • MLA II |
| Muhammad Faiz Bin Ab Malek | Malaysian Refining Company SDN BHD | Malaysia | • MLA II |
| Ahmad Faizal Bin Ab Talib | Yinson Lavender Operations Sdn Bhd | Malaysia | • MLA I |
| Amr Hassan Abayazeed | Egyptian Petrochemicals Company | Egypt | • MLA I |
| Yousif Abbas | Bahrain Petroleum Company; BAPCO | Kingdom of Bahrain | • MLA I |
| Feras Abbas | Unknown | Saudi Arabia | • MLA I |
| Elamin Abbashar | Afton Chemical Corporation | U.A.E. | • MLA II • MLT I |
| Michael Thomas Abbate | RelaDyne | USA | • MLT I |
| Thomas Abbate | RelaDyne | USA | • MLT I |
| Billy Abbott | Georgia Pacific | USA | • MLT I |
| Earl Abbott | RelaDyne | USA | • LLA II • MLT I |
| Abdalla Abd El Monteleb Abd El Lateef | Cooperative Petroleum Company (CPC) | Egypt | • MLA II |
| Mostafa Mohamed Abd El-Haleem | EPROM | Egypt | • MLA I |
| Mohamed Atta Abd El-lattif | Cooperative Petroleum Company (CPC) | Egypt | • MLA II |
| Omar Mohamed Abd Elsalam Aziz | Petromaint | Egypt | • MLA I |
| Elifazlin Binti Abd Fattah | Malaysian Refining Company SDN BHD | Malaysia | • MLT I |
| Nurhazwani Shahirah Bt Abd Jamil | PUSPEKA | Malaysia | • MLA II |
| Mohamad Khairolnizam Abd Karim | Pengerang Refining | Malaysia | • MLA I |
| Syahril Rafieq Abd Manab | Petronas | Malaysia | • MLA I |
| Fatin Myra Bt Abd Manan | Metalux | Malaysia | • MLA II |
| Mohamad Tirmizi Bin Abd Rahman | Kaneka | Malaysia | • MLA II |
| Nydia Nathasha Binti Abd Razak | PUSPEKA | Malaysia | • MLA II |
| Mahmoud Abdallah Abou-khattab | Cooperative Petroleum Company (CPC) | Egypt | • MLA II |
| Sami Abdel Rahman Abdel Razeq Mdallal | Jordan Bromine Company (JBC) | Jordan | • MLT I |
| Mohamed Farrag Abdelalim Farrag | Enova by Veolia | U.A.E. | • MLA I |
| Mohamed Emad Abd-Elaziz | BAPETCO | Badr Petroleum Company | Egypt | • MLA I |
| Sharaf Eldeen Abdelbagi Adam | Petrobash. M.A Co. Ltd, | Sudan | • MLA I |
| Amjed Amin Abdelgail Mustafa | Chevron AlBakri Lubricants | Saudi Arabia | • MLA III • MLA II |
| Mohamed Ahmed Saber Abdelgawad | Rashid Petroleum Company | Egypt | • MLA I |
| Amr Mohamed Mahrous Abdelghani | Saudi Aramco | Saudi Arabia | • MLA I |
| Abdelhamid Mosaad Abdelhamid | Atlasco Egypt | Egypt | • MLA I |
| Hussein Galal Abdelhamid | Unknown | Egypt | • MLA I |
| Mahmoud Yahia Abdelkader | EPROM | Egypt | • MLA II |
| Khaled Ahmed Abdelmoniem | Khalda Petroleum Company | Egypt | • MLA I |
| Hassan Abdelsalam Abdelnabby | Zeina Group | Egypt | • MLA I |
| Hesham Fathy Abd-Elnaby | Unknown | Egypt | • MLA I |
| Hatem Atef Abdelhalim Abdelraouf | Khalda Petroleum Company | Egypt | • MLA I |
| Mohamed Gamal Abd-El-Sadek | Quality Oil for Lubricants and Petroleum Derivatives | Egypt | • MLA II |
| Mosab Abdelal Abden Mohamad | Oman Oil Marketing Company | Oman | • MLA II • MLT II • MLT I |
| Ahmed Mohamed Elsayed Abdo | Midor | Egypt | • MLA I |
| Mohd Nazim Shah Bin Abdol Rahman | Petronas Chemicals Methanol SDN BHD | Malaysia | • MLA I |
| Mohd Fadzli Abdollah | Universiti Teknikal Malaysia Melaka | Malaysia | • MLA I |
| Mahmoud Abdou | Methanex | Egypt | • MLA II |
| Mohamed Abdalfatah Abdrabouh | Unknown | Egypt | • MLA I |
| Amnan Azhan Abdul Aziz | Unknown | Malaysia | • MLA I |
| Hamsatun Abdul Ghani | Sadara Chemical Company | Saudi Arabia | • MLA III • MLA II • MLT II • MLT I • MLE |
| Muhammad Azlan Shah bin Abdul Latif | PrefChem | Malaysia | • MLA I |
| Mohd Fauzy Bin Abdul Latif | Kinsajasa Sdn. Bhd. | Malaysia | • MLA II |
| Muhammad Abdul Nasir | Total Energies | U.A.E. | • MLA I |
| Muhammad Lutfi Bin Abdul Rahman | Petroknowledge SDN BHD | Malaysia | • MLA II |
| Khairul Hazwan Bin Abdul Rahman | PETRONAS Gas Berhad | Malaysia | • MLA II |
| Zaty Hazwanie Binti Abdul Rais | Glide Technology SDN BHD | Malaysia | • MLA I |
| Mohammed Ali Abdul Razak | Moove Lubricants | UK | • MLA II • MLT I |
| Mohammad Abdulhaleem | Saudi Aramco | Saudi Arabia | • MLA I |
| Muhannad Abdulhamid Alhazmi | Saudi Aramco | Saudi Arabia | • MLA I |
| Hilmi Abdullah | Malaysian Refining Company SDN BHD | Malaysia | • MLA I |
| Mohd Azman Bin Abdullah | Universiti Teknikal Malaysia Melaka | Malaysia | • MLA II • MLT I |
| Azhar Abdullah | Petronas Lubricants Marketing Sdn. Bhd. | Malaysia | • MLA III • MLA II • VIM |
| Mohd Nazri Abdullah | Kinsajasa Sdn. Bhd. | Malaysia | • MLA II |
| Hamad Abdullah Almugarry | Saudi Aramco | Saudi Arabia | • MLA I |
| Ruslan Abdullayev | KAZ Minerals | Kazakhstan | • MLA I |
| Sylvie Abingeneye | Laurentide Controls Ltd. | Canada | • MLA I • MLT I |
| Nadiya Abitova | KAZ Minerals | Kazakhstan | • MLA I |
| Belal Ibrahim Aboelfetouh | John Crane | Egypt | • MLA II |
| Kamal Ahmed Aboelkamal Ali | Petrobel | Egypt | • MLA I |
| Moataz Mohamed Abouelhamd | Khalda Petroleum Company | Egypt | • MLA I |
| Mohamed Elsayed Abouhashish | RITEC - The Condition Monitoring Company | Egypt | • MLA I |
| Amr Zakaria Khalifa Aboutaleb | Unknown | Egypt | • MLA II • MLA I |
| Andrew Abram | Genesis Alkali | USA | • MLT I |
| Mathew James Abrams | Hecla Mining Co. | USA | • MLT I |
| Jason Abrams | Georgia Pacific | USA | • MLA I |
| Azrul Nizam Abu Bakar | Petronas | Malaysia | • MLA I |
| Ammar Abdullah Abuassonoon | Saudi Aramco | Saudi Arabia | • MLA II • MLT II • MLT I • MLE |
| Alonzo Acevedo | Amentum | USA | • MLT I |
| Fernando Acevedo | Pinnacle Foods Group | USA | • MLT I |
| Manuel Aceves | Inland Empire Utilities Agency (IEUA) | USA | • MLT I |
| Martin Acheampong | WearCheck Ghana | Ghana | • LLA II |
| Nnamdi Jude Achebe | Petrosave Integrated Services Ltd. | Nigeria | • MLA III • MLA II • MLT II • MLT I • MLE |
| Alexa Dawn Ackermann | WTCC - Management Services (Waste Treatment Completion Company) | USA | • MLT II • MLT I |
| James Ackley | Shell | USA | • MLA II • MLT II • MLT I |
| Julio Acosta | POLARIS Laboratories | USA | • MLA II |
| Nelson Guido Acosta Rojas | Kimberly Clark | Peru | • MLT I |
| Edui Jose Acosta Yuburi | SKF del Peru | Peru | • MLT I |
| Karl Adam | Voestalpine Stahl GmbH | Austria | • MLA II |