Suman Kumar Saha
Dhaka
Summary
Highly-motivated employee with desire to take on new challenges. Strong worth ethic, adaptability and exceptional interpersonal skills. Adept at working effectively unsupervised and quickly mastering new skills.
Overview
19
19
years of professional experience
1
1
Certification
Work History
Head of Service Operation Center
ADN Telecom Ltd.
Dhaka
11.2020 - Current
- Data Center power monitoring NMS with IoT sensors at UGC (University Grant commission)
- Resolved escalated complaints from customers in an efficient manner for around 18000 links.
- PortaOne BSS/OSS application for Billing and Telephony, cloud PBX implementation
- SMSC operation with mobile operators
- Technology, Service delivery and pre-sales team lead
- Secure data connectivity with VPN for enterprises
- Team planning, monitoring to reach management goals and targets
- Application migration to AWS cloud.
- Private cloud with Oracle servers and Type-1 Hypervisor Citrix XEN
- Live data monitoring system for Bangladesh Satellite Company Limited with Grafana
- Auth and Recursive DNS server implementation for the Bangladesh Military with a management portal
- Provided direction, support and guidance to team members in order to facilitate the achievement of departmental goals.
- Implemented IDS/IPS with Fortinet, Snort, Suricata to secure the private cloud.
Technical Director
Pipeline Security
Japan
07.2019 - 10.2020
- Responsibilities: Implemented DNS firewall for operators and major systems integrators like Marubeni (Japan), Singtel (Singapore), Citra (Indonesia), Hope Rising (China), JMD (Japan) and many more
- Implemented threat hunting SOC platform based on DNS queries on operator networks
- DNS system integration with Dnsdist, PowerDNS, Unbound, Bind
- Implemented email security gateway to different operators with Spamhaus premium cyber threat data service in Asia Pacific and Africa
- Implemented email security dashboard to measure email threats
- Milestones:
- I was project lead to develop a SOC dashboard analyzing logs and after extracting the events it was correlated with other relevant data
- The product was one of my brain child and that I presented at the Apricot 2019 conference in South Korea
- Development platform was Logstash, Elasticsearch, Kibana, Postgres and Python
- For Singtel (Singapore), Integrated F5 Big IP DNS firewall with Spamhaus threat Intel
- That was challenging to provide all categories of threat intel data from one single source as F5 can receive data only through one zone file
- For Singtel (Singapore), automated white listing using a web portal
- For Marubeni (Japan) and Hope Rising (China), I integrated their six DNS firewall and developed a SOC platform
- Integrated DNS firewall for CITRA, one of the largest ISPs in Indonesia and provided SOC platform.
AGM, Systems
Amber IT Limited
Dhaka
12.2009 - 06.2019
- Responsibilities: Team lead for system administration, IP Telephony, IPTV, OTT, helpdesk, customer support departments
- Configured SIP soft switch and Cisco Call manager, Avaya, Alcatel integration along with TDM connectivity
- Implemented parental control system using SafeDNS
- Private cloud with ZFS, LXC, LXD, KVM
- Email servers & Barracuda Email security gateway administration for many customers
- Fortinet Web application Firewall & Network Abuse incident handling
- Implemented a DNS firewall and created a dashboard with Elasticsearch, Logstash, Kibana as a threat hunting tool.
Assistant Manager(Systems)
Bangladesh Internet Exchange Limited(DNS)
Dhaka
01.2006 - 11.2009
- Responsibilities: Maintaining & Troubleshooting ISP networks based on Cisco routers and switches
- DNS, mail server (Qmail & Sendmail), Nagios, proxy (squid), web server (apache), DHCP, Cacti, MRTG, Nagios in Linux
- Maintained firewall, Internet and email security, VPN
- Lead the support team.
NOC Engineer
BTS Communication(BD) LTD
Dhaka
01.2005 - 12.2005
- Responsibilities: Maintaining & Troubleshooting ISP network
- DNS, mail server (Sendmail), spam protection, mail antivirus, proxy server, apache server, MRTG in Linux
- Setup Monitoring & troubleshooting all the links (server to user end by radio link, SDSL, ADSL, DVB)
Education
Bachelor of Science - Computer Science
Dhaka City College
Dhaka06-2005
Skills
- IT Project management
- Linux System Administration
- Linux Server Security/Hardening
- AWS, Azure, IOT, SOC
- Log analysis, Packet analysis
- OEM SOC application development
- Multiple Priorities Management
- Service Delivery
- People Management
- Development SOC dashboard
- Python,Elasticsearch, Logstash, Kibana, Filebeats, Ansible automation
- IPS/IDS: Fortinet,Pfsense, Snort, Suricata
- Private cloud and storage deployment
- XEN, KVM, LXD, LXC, ZFS ,Proxmox
- DNS/DNSSEC
- Platform: Debian, Ubuntu, Redhat, Centos & Kali
Certification
- RHCE, 07/24/09
- CCNA, 07/21/07
- JNCIA-EX (Associate, Enterprise Switching), 12/31/2009
- JNCIA-ER (Associate, Enterprise Routing), 12/18/2009
Personal Information
- Father's Name: Samir Kumar Saha
- Mother's Name: Shefali Rani Saha
- Title: Team Lead, Service Operation Center
- Date of Birth: 01/01/81
- Nationality: Bangladeshi
- Marital Status: Married
- Religion: Hindu
Languages
- Bengali
- English
Publications
- The Third Conference of the CICA Non-Government Forum, Chongqing, China, 11/2019, Panel discussion on Cyber Hygiene and regional cooperation
- SGNOG Conference, Singapore, 08/2019, DNS Firewall implementation and threat hunting in Operator Network
- APRICOT 2019 Conference, Daejeon, Korea, 02/2019, Make the internet safer with DNS firewall and use DNS as a threat hunting tool
- SANOG32 Conference, Dhaka, Bangladesh, 10/2017, Cyber Security Incidents in ISPs in Bangladesh
- APCERT 2018 Conference, Kathmandu, Nepal
- 8th APT Cybersecurity Forum Conference, Dhaka, Bangladesh, 10/2017, Cyber security incident handling in ISP
- RISE Conference, Bangkok, Thailand, 07/2016, CyberSecurity Incidents in Bangladesh
- APJII-APNIC Workshop, Batam, Indonesia, 05/2016, APNIC Community Trainer on DNS/DNSSEC
- CSM2015 Conference, Kuala Lumpur, Malaysia, 09/2015, Secure Voice communication with Open Source Tools
References
- Md. Aminul Hakim, CEO, Amber IT Limited, mahakim@amberit.com.bd, +880 1713030203
- A S M Naushad Alam, Head of Network, United Commercial Bank Limited, naushad.alam@ucb.com.bd, +880 1714167402
Disclaimer
I confirm that, to the best of my knowledge, the information given above is correct.
Languages
Bengali
First Language
English
Upper Intermediate (B2)
B2
Timeline
Head of Service Operation Center
ADN Telecom Ltd.
11.2020 - Current
Technical Director
Pipeline Security
07.2019 - 10.2020
AGM, Systems
Amber IT Limited
12.2009 - 06.2019
Assistant Manager(Systems)
Bangladesh Internet Exchange Limited(DNS)
01.2006 - 11.2009
NOC Engineer
BTS Communication(BD) LTD
01.2005 - 12.2005
Bachelor of Science - Computer Science
Dhaka City College
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