- Verify and approve all tech specs of M.E.P before sending them to purchasing team to create RFP.- To consult BoD to choose a building which can use for both office and DC in central of Hanoi capitalHoang Hoa Tham site - Project: Data Center N3 building- To consult and re-design electrical system;- To guide teams at site in order to draw and get requirements from vendors as Uptime Tier III requested; To create HLD calculation document and consolidate, re-verify all drawings before submitting to Uptime. The project target to get TCDD Tier III - Uptime.Create concept design - High level design:- An Khánh - Hanoi - Vietnam 3.0ha - 80MW IT PUE 1.4- Tan Phu Trung - Cu Chi - Ho Chi Minh city - Vietnam - 120MW IT PUE 1.4- A DC in central of Hanoi capital Vietnam - 120MW IT PUE 1.4Hoa Lac site:20T6 project- Re-design electrical system and re allocate space for MV room/ LV distribution room/ Diesel generator area of DC of Ministry of Defense - MoD to expand DC power in second phase future; Support deployment team and Vendors to implement DC of MoD (650kW IT)- Design a new DC next DC of MoD which can use for future by MoD or Viettel IDC (650kW IT)9.1ha project:- Create high level design for MEPF DC based on 3 phases of project.- Verified and correct the design of consultant company for cooling system and electrical system to following Tier III Uptime, minimized risks and optimized cost for deployment.- 2023 implementing phase 1 DC: Support technical information, FAT CRAH, pump, Chiller, electrical cabinet systems; create flow chart to control, display, collect data, change parameters and AI&ML for BMS to control chiller system and display other ancillary systems of Data Center.Binh Duong site:- To do a solution that will best fit for DC at the last stage ( The 1st: To renovate chilled system as main cooling system + using PAC system.- Design 2 more DC (4th + 5th floors) and expand 1 DC (2nd floor)

M.E.P engineering solution verification for smart cities, office, apartment, commercial center buildings, hospitals, schools and infrastructure facilities: New design-material solutions, All M.E.P issues, problems need to be resolved by new solutions at construction sites before officially approvals.Project Co-ordinator/MEP engineering for Lagoon project- a first salty pool design as a beach entertainment in Vietnam:- Detailed design and build up Lagoon to comply with Crystal Lagoons standards (Chile Contractor).- Co ordinate with Crystal Lagoons contractor to give detailed instruction for Lagoon construction time by time; test phase by phase with engineering team, operation team of Crystal Lagoons to get approval from Crystal Lagoons.- Set up first phase for operation team; create specifications of material, tool, equipment and device for operation.Second M.E.P engineering verification for all consultancy contractors.

Delivered completely concept design for: 03 new buildings of Data centers; infrastructure/ M.E of Data/ Telco Center (02 DC 7.7MW, 3 floors/ 3,575m2 per floor; 01 DC 2.2MW 2 floors/ 2000m2 per floor); (All equipment detailed layouts, AC/DC power distribution/ calculation, backup power solution/calculation, cooling solution/calculation, building interior architecture and exterior concept architecture)Delivered completely cost estimation of capex/opex and porject time plan to build up new data center.Delivered completely SoW for construction/ Data Center consultancy contractors.Created completely technical specification of diesel generator/ synchoronized systems for bidding process.* Achievements: First time create detailed Scope of work for construction consultancy and Data Center Consultancy.First LEED gold standard is required for DC building construction.

Data Center Infrastructure/ M.E designerMain key projects have delivered (Data Center infrastructure/ M.E/ room concept design and deployment: All equipment detailed layouts, AC/DC power distribution/ calculation, backup power solution/ calculation, cooling solution/ calculation, passive optical/ electrical network, building interior architecture and exterior concept architecture)Meet Tier III – Uptime:1. (Design & deploy) 01 Data Center at Hanoi – Vietnam: 1 floor/ 1400m2; 1620kW total power consumption. Completed design in quarter III/2015; deployed and launched service in 12/2016.Follow Tier III – Uptime/ TIA 942A:1. (Design) 01 new DC at Da Nang - Vietnam: PUE ≈1.6, 6 floors/ 420m2 per floor, 2,375kW total power consumption and can be upgradable to 3,088kW. Completed design building in quarter I/2016, High/ Low Level Design in quarter I/2018 and started to build up DC in quarter I/2019.2. (Design) 01 new MTSO at Trujillo – Peru: PUE ≈ 1.9, 2 floors/ 900m2 per floor; 725kW total power consumption. Completed building design in quarter I/2017, HLD/LLD in quarter I/2019.3. (Design) 01 new MTSO at Phonexay – Laos: 1 floor 750m2; 1,450kW total power consumption. Completed design HLD/LLD in the end of 2016 and started to build up Data Center in quarter II/2019.4. (Design) 01 new MTSO at Yangon – Myanmar: 2 floors/ 1,050m2 per floor; 1,820kW total power consumption. Completed design HLD/LLD in quarter I/2017, building design in quarter II/2017 and launched services in quarter I/2018.5. (Design) 01 new MTSO at Mandalay – Myanmar: 3 floors/ 1650m2 per floor; 1,410kW total power consumption and can be expanded. Completed design HLD/LLD in quarter I/2017, building design in quarter II/2017 and build up Data Center in quarter II/2019.6. (Design & deploy) 01 new submarine cable landing station AAE1 at Vung Tau – Vietnam. Completed design to renovate the building, HLD/LLD in quarter I/2015, launched network in quarter I/2016.

Meet rated 2 – TIA 942: All 3 sites are completed design in the third quarter of 2013.1. (Design & deploy) 01 renovated MTSO at Ha Noi – Vietnam: 1 floor/ 1400m2; 1280kW total power consumption. Completed infrastructure renovation in quarter I/2014 and swapped/ migrated mobile core systems to balance IT load in around 2 years next. 2. (Design & deploy) 01 renovated MTSO at Da Nang – Vietnam: 1 floor/ 800m2. Completed infrastructure renovation in quarter I/2014 and swapped/ migrated core systems to balance IT load in around 1 year next.3. (Design & deploy) 01 new MTSO/Data Center at Ho Chi Minh – Vietnam: 1 floors/ 1,400m2; 1280kW total power consumption. Completed infrastructure renovation in quarter II/2014.Project Manager:1- Delivered completely the infrastructure renovation for Telco Center at Hoa Lac, Hoa Khanh sites; create new Telco center at Hoang Hoa Tham site. Balance IT load in Hanoi 100%, Hoa Khanh 100% and Hoang Hoa Tham 50%. Started in 08/2012 and closed in 05/2014.2- Delivered completely the upgradation of all network of Viettel to improve network quality and capacity before lunar new year 2012 and 2013.* Achievements: Improve design DC/MTSO to reduce PUE as low as possible to cut down opex and meet Tier 3 - Uptime.Design based on customer requirements to fit in with operation team.Renovate DC/MTSO to improve infrastructures, minimize risks for operation and balance power for upgrading core network in 3 regions.Lead design team and co-ordinate with construction/ M.E contractors to build up building and Data center as designed.Create the first guideline HLD to design data/telco infrastructure for Viettel.

Project Manager1- Delivered completely operation/ logistics project - 15,000 upgraded/ repaired radio units of all customers (mobile network providers) to correct network fault. - Managed LUC (Local Upgrade Center) - multi countries project (Sweden, Malaysia and Vietnam) to repair/ upgrade 15,000 radio units of Ericsson's BTS of all customers that made sleeping cells.- Create time plans, cost/ budget plans; Approve standard/ norms for operation. Allocated cost for all activities of the project in SAP system.- Organize weekly meeting between Vietnam, Malaysia & Sweden to report about project progress (outstanding, issues, planning, methods to resolve issues, deployed cost).- Manage logistics team to get/ return buffer between Vietnam, Malaysia & Sweden and inflow/outflow equipment to/from customer/ LUC2- Delivered completely network design for Viettel mobile core network. (Full technical detail design of 25 new MSC server (MSS) nodes, migrate 13 MSS server nodes, upgrade 19 MSC classic).- Coordinate with Sweden & Australia to get software license; Incorporate with global resource to get high competent human resources for deploying sub-project; Deploy First Node Implementation MSSs/MSCs classic at Viettel sites- Manage logistic team in Vietnam and Sweden to deliver purchased equipment to customer sites for installation.3- Delivered completely a full turnkey project (Lawful Intercept).- Create time plan, budget for a sub-projects to deliver equipment from Ireland to Vietnam & deploy at Viettel site. Handed over completely PAC.4- Delivered completely 2 BTS sites sample installation of 450 sites project to prove ability of expanded access network.* Achievements: Delivered completely a full turnkey project; Time & cost/ budget plans for pre-sale/ deployment. Co-operated with global software project management/ sale/ deployment/ support teams to meet targets.Delivered completely one project from started to completely closed (logistics, operation and finance).

1- Site Engineering/ Presale engineer:- Delivered completely Low Level Designs all M.E and drawings of all BTS sites and 3 MTSOs to migrate Vietnamobile network from CDMA 1X technology to GSM technology to global sale team.- Delivered completely the design and deployment to upgrade AC/DC power of 3 MTSOs of Vietnamobile network (Telco Center of HTmobile old name).- Delivered Low Level design to upgrade M.E at all BTS sites of Vietnamobile network. Key engineering person to approve changed management M.E of all sites.- Delivered a presale M.E design for BTS/transmission sites in Australia; design and installation of a trial project for VNPT customer (Leased line network).- Check installation quality at BTS site to verify installation vendors.2- Access network senior technologist:- Manage all access network sites of Vietnam mobile network project in North of Vietnam.- Support managing AC/DC power, Diesel generators of MTSO site in Hanoi (MSC) as back office.* Achievements: Knowledge to design M.E infrastructure for a MTSO (Telco)/ Data Center; Global team working. Incorporated with global sale/ engineering/ logistics teams.Create processes for troubleshooting access network and M.E of core network in managed service for customer. Site quality acceptance processes and Acceptance Test Procedures.Coach BTS installation vendors to comply with Nortel standard design.

1- Operation engineering team leader: Manage contracts of site rental/ electricity/ transmission; site survey for new areas.2- Network operation: Manage RAN (Radio Access Network) system in S Fone's Core network - CDMA network.* Achievements: Reduced Opex by changing the electricity price from business price to manufacturing price; Create cost plans for monthly payment (site rental/ electricity/ transmission); Understood CDMA core network.

1- Access Network regional team leader (10/96-06/2003)- Recover access network, maintain and develop expanded coverage Network in southeast area of Vietnam - Vinaphone network (GSM network). Made plan to maintain all sites in periods.- Create plans for staff training, cost, site maintenance and materials/ equipment need to department.- Install and do commissioning BTS (Base Transceiver Station) sites in projects of south of Vietnam to develop coverage of Vinaphone network.- Recover off-air BTSs and BSC (Base Station Controller).* Achievements: Managed region network in good operation.