Our Instructors

Li-Ji Hong

Li-Ji Hong

Li-Ji started his career in IT and Communication industry and became a professional instructor since 2004. As a technical consultant, he had participated in major networking projects for enterprises and service providers in Taiwan and China. As an instructor, he taught and achieved high MTM scores on Cisco core technical courses, NetApp trainings, and cross-vendor topics like Flexpod, programming languages, Software Defined Networking (SDN), and OpenStack.

Li-Ji is a Certified Cisco Systems Instructor (CCSI #30641) and a NetApp certified instructor. He also holds Cisco Certified Internetworking Expert (CCIE #8299) active status since 2001.

Susanne Haas

Susanne Haas

Susanne is an expert in the field of Networking and Telecommunications whose career spans over 30 years of network implementation and design as well as teaching experience. In the course of her career, she has attained technical expertise in areas such as; enterprise IP networking, wireless networking, cloud networking, network visibility and packet access, network security, Carrier Ethernet, MPLS, cellular network technologies, video technologies, VoIP technologies, transport and signaling, and optical technologies such as SONET/SDH.

She holds multiple certifications in these technology areas including CCNP and CCIE written level certification for Routing and Switching technologies, Wireless and Security from Cisco as well as other vendors.

Susanne is one of the top rated instructors in the US and in addition to her CCSI#34995 she holds instructor level certifications for vendors such as Juniper, HP and Ciena.

Most recently she has been involved in design and implementation of network visibility and packet access for both physical and cloud networking environments as well as network security. In addition to teaching, she writes certification courses for groups like Cisco, HP, Juniper, Gigamon, etc.

Jim Wagstaff

Jim Wagstaff

Jim is an expert in the field of Information Technology whose career spans over 25 years in organizations of high repute in various parts of the world. Jim’s expertise in IT has helped many leading industry players of IT in the areas of sales, pre-sales, distribution, channel-related activities, route-to-market / go-to-market messaging and approaches related to cloud services, infrastructure, and related solutions.

Jim works with a variety of organisations in the areas of business advisory, channels and go-to-market planning, optimisation, and execution, business development, and process improvement. Jim also works with managers and executives as a certified behavioural consultant focusing on workplace culture, sales, management, and leadership.

Jim is an MBA alumnus of the University of Liverpool in the United Kingdom. As a doctoral researcher at the University of Liverpool, he is steering his work on the real-world application of research that is derived from, and related to, marketing, sales, and distribution practices in technology firms.

Michael Shawky

Michael Shawky

Michael Shawky has demonstrated history of working in a highly reputable Technical ICT Trainer/Network Engineer since 10 years solutions industry. Attained CCSI# 31024.

Michael is one of the TOP 10 instructors in APAC in 2012 - 2013 as per MTM statistics.

He is a Certified Network Professional BCMSN, BSCI, ISCW, TSHOOT, SWITCH, ROUTE and CCNP Voice. Developed of technology / box based classes for most ICT vendors. Over the course of his career Michael has technical consultancies for various business sections covering technologies like cloud design, unified communications, network security, telepresence, MPLS, Application network services, building virtualized datacenters using VMware VSphere. Michael has a various experience teaching in the Information Technology training field.


Shreedevi has been delivering 9 years of consulting, training experience on Routing, Switching, Network Security, and Microsoft technologies. He is a Certified Cisco Systems instructor (CCSI), Implementing Cisco Datacenter unified fabric (DCUFI), NetApp Certified Data Management Administrator (NCDA), Switch, Building Scalable Cisco Internetwork (BSCI), Cisco Certified Network Associates (CCNA).

Shreedevi possesses excellent presentation, conduct training in an effective and efficient manner. Shreedevi has performed bunch of technology consulting profiles like Implementing Static and Dynamic addressing service for hosts in a Lan environment, Calculate and apply an addressing scheme include VLSM ip addressing design to a network, Configure, verify, and troubleshoot basic router operation and routing on Cisco devices, Designing & Configuring routing protocols on Cisco Routers (RIP, OSPF, EIGRP, BGP) Configure OSPF LSA types, Clearing the BGP Attributes and mayn more. His creative thinking makes him very highly recommended in training activities to name a few trainings he handled are IBM, Accentor, AT&T, Cisco, HP, Barracuda Network.

Kumar S

Kumar with over 10 years of experience in working as a certified trainer for NetApp NCI and Cisco CCSI. He is also certified VCP 6 – DCV, NCDA – NetApp, PIMPADM - FlexPod Implementation and Administration, FPIMPADM – FlexPod Design Solutions, Citrix XenApp Certified and many more. Kumar is a highly accomplished, results-driven Compute and Storage professional with special expertise in architectures, analysis, and engineering.

Currently Kumar is a Sr Technical Consultant and was a Technical Architect for a tech consulting firm and delivering training for NetApp, Cisco UCS, Flexpod, and VMWare. Proven the ability to support pre and post sales efforts by developing and presenting innovative solutions that meet customer/students needs. Adept at design, testing – validation, management, and performance improvement. Kumar is also a NetApp awarded “Instructor of the Year 2015” for APAC region.

Mark Kerzner

Mark Kerzner

Mark Kerzner is an experienced instructor with a demonstrated hands-on Software Architect, Writer, Trainer, Data Scientist. Distributed and grid computing, AWS - complete spectrum, Spark, Hadoop, MapReduce, MapR, Hive, Pig, Sqoop, Flume, HBase, Cassandra, high-performance multi-threaded applications, data mining, text analytics, mathematical optimization, linear and dynamic programming, Visualization (Tableau) and a Big Data professional. Currently Mark is also involved in Managing partner, trainer, software architect. As well in a number of Big Data / Hadoop projects in eDiscovery, search, marketing, and training.

He implements customer data collection with Scala/Spark/Hadoop analytics, Project for quantitative trading: architect Scala/Spark/Hadoop/HBase infrastructure, assist with data analysis, such as similarity-set, dimensionality reduction (PCA), grouping and clustering (K-means), ranking, regressions, correlations, Tableau visualization of results. Mark Kerzner graduated from St. Petersburg University, Russia. MS in Math, 1978. He is also the Co-author, trainer for ElephantScale LLC and Springer, “Guide to Big Data Applications”, 2017. IEEE Member since 1980 and ABA Member since 2013.

Sujee Maniyam

Sujee Maniyam

Sujee Maniyam have taught 1000s of students across many developing countries. He is a co-founder and principal trainer at Elephant Scale - specialize in training in Big Data and Data Science technologies. Expert Big Data practitioner with many years of hands-on experience. Designed and implemented numerous Big Data solutions for startups and enterprises. Sujee acquired certifications like Apache Spark Certification by Databricks and O'Reilly Media, Cloudera Certified Hadoop Developer, Hortonworks Certified Hadoop Developer and Hortonworks Certified Hadoop Administrator.

Sujee has professional knowledge of Big data, Data Science, Programming Languages, Database, Dev Tools, and Domain Knowledge. He is an author of 'hadoop illuminated', 'hbase design patterns', 'data analytics with Spark and hadoop'. Sujee graducated from University of Melbourne Australia 1998 BS Computer Engineering.

Tim Fox

Tim Fox

Tim Fox has an 16 years' professional experience as an architect, lead, and consultant, with recent emphases in Big Data Architecture and Data Science Development. Tim specialize on Machine Learning, Big Data Architecture, Data Science, and Analytics. Also specialize in implementation of scalable machine learning solutions built on Spark ML and Tensorflow.

Tim also do big data architecture on the Hadoop platform. Also lead an offshore team able to do heavy lifting of project implementation. Tim conducted great workshops, conferences, and training in Big Data and Data Science technologies through Elephant Scale.

Tim has a work experience as a Software Architect and Trainer performed seminars on Big Data technologies and delivered Big Data Solutions. Tim graduated in Virginia Tech, Blacksburg, VA B.S. Computer Engineering 1992 - 1996 with Major Projects Performed Natural Language Processing research as part of Artificial Intelligence coursework and project work.


Desudas Chandirasegar

Desudas is commited to serve the Digital Revolver as a Technical Consultant with dedication and commitment for better results. He accumulated certifications over the years like HP-UX CSA, CompTIA Network + Certified Professional, VMware Certified Associate – Datacenter Virtualization, MCSA Windows 2012, Citrix Certified Associate – Virtualization, Pearson VUE Administrator, NetApp Certified Data Management Administrator.

Desudas has a professional knowledge with Netapp DATA ONTAP(7-mode/Clustered), NAS/CIFS Administration, SAN Administration. Netapp DATA ONTAP(7-mode/Clustered), CIFS Concepts / NAS Topologies, RAID concepts – RAID1, RAID10, RAID5, RAID6 and RAID, Installing, configuring, & Troubleshooting VMware vSphere 4.1/5.0/5.1/5.5, VMware vSwitch Configuration and management, Configuring and managing VMware HA and DRS Cluster, Deploying App and Desktop Solutions with Citrix XenDesktop 7/7.6, Installation, configuration and troubleshooting of Redhat Linux 5/6/7 and many more. With his technical skill set with Operating systems, configurating servers, Server virtualization with his expertise students will grow their knowledge exponentially. Desudas Graduated from Pondicherry University Bachelor of Electronics and Communication Engineer 2010.

Alex Fok

Alex Fok is a Certified IT professional trainer with 20+ years experience which he brings into the class room to the benefit of students. He attained CCIE # 29961. Alex with his strong communicator with a passion for training and passing on knowledge.

He is a specialist instructor on Security and was the first to implementing Cisco ISE 2.0 lab upgrade and run the first Cisco ISE workshop for Cisco. Thereafter he became one of the first instructors in the globe to be authorised to teach this version of the security product.

In addition he is a dual certified Cisco and NetApp Instructor. He has successfully deployed a cloud version of the Netapp student lab using VMware vcloud. Awarded Instructor of the year 2013 and Cisco Security APAC instructor 2015. Conducting Cisco authorized courseware including entire CCNP Security track and all foundation level security courses. Specialties: Cisco certified Instructor CCSI, CCNA,CCDA,CCNP,CCIP,CCSP and EMC STF certifications.