1. Majoring in Telecommunication Engineering, especially wireless communication, Network Communication, Multimedia and Transmission Communication. 2. I have knowledge about PSTN Network (Exchange, MDF, DP, Signaling Gateway) Cellular Concept (CDMA, WCDMA, GSM, UMTS, IMS), Access Network,SS7, Digital Switching,Packet Switch and Network Security,MPLS,Frame-Relay,and ATM, 3. Familiar with Ericcson RAN device (RNC,RXI,TN,Marconi,RBS) in P6 ,P7 and W10 4. Familiar with windows (97,2000,2003 server,XP,Vista), and Linux/Unix (RedHatv9, Enterprise), Fedora(v5,v6), Slackware (v9,v10,v12) 5. Familiar with Oscilloscope, Spectrum Analyzer, Public Telephony Exchange (STDIK), IP PABX ALCATEL, SOFTSWITCH TRG-CRX101 Cisco router 2600,Cisco router 1700, Cisco router 3800, Cisco router 7200 6. Familiar with internetworking and internet (TCP, IP, LAN, WAN, Wireless) 8. Research in Dialogic Card DJCT/LS, IVR, IVM; 9. Research in VoIP application using H.323, SIP, IAX. 10. Research in Softswitch Class 4 implementation and NGN,MSAN11. Research in Security VoIP service for NGN 12. Research in ENUM Server and Email Server 13. Research in Asterisk as a IP PBX and Free PBX14. Research in Zimbra as Email Server for small office15. Research in IMS for enterprise solutionSpecialties: telecommunicationNow focusing on security, spesific area for PKI ( public key infra structure )1. Deploy CA (certificate autority ) with ejbca enterprise 2. Managing system for storage private key with HSM ( hardware security module )3. Deploy and maintance OCSP and Crl for checking validation of certificate 4. Hardening and pacthing server for CA infrastructure5. Monitoring network security 6. Research and development for security update 8. Testing and asssestment vulnerability 9. Implementation of stadarization information security (ISO 27001)