Mark A. Schleifer
mas@schleifer.org
Manage Network Security team globally (Reston, VA and Dublin, Ireland). Team is responsible for all aspects of network security including security incident response, AAA for network devices and compliance (PCI, FedRAMP, etc). Manage various Network Engineering teams based on geography and/or functional area with reports in Reston, VA, New York, NY, Boulder, CO, Mountain View, CA, and Dublin, Ireland. Team members work on all aspects of Google’s production networks including Internet facing, Inter-Datacenter (B4 SDN Network) and Intra-Datacenter (Jupiter clusters).
Responsible for strategic and tactical engineering of Cogent’s IP network. Cogent’s network was made up Cisco ASR9K & 7600 routers connected to Long Haul DWDM systems carrying multiple 10GE Point to point circuits as well as Metro based CWDM/DWDM systems carrying Gigabit and 10 Gigabit Ethernet circuits. Responsible for integrating 13 network and customer acquisitions over a 3 year period. Involved in all aspects of company, including those outside of direct responsibility, as that is the nature of working for a startup including being personally responsible for C-Root nameserver operations after the PSINet acquisition.
Manage Network Engineering group, Capacity Planning group and Research and Development group. Responsible for creating and installing a robust, high-availability, scalable web farm design including core, distribution, and cluster layer routers and switches and structured wiring. Manage contractors during construction of computer rooms, data closets, and intra-campus underground fiber pulls on both east and west coast projects. Coordinate peering and backbone circuit deployment to maintain network throughput and availability. Network equipment includes: Cisco routers (12012s and 7206s), Cisco Switches (6506 and 6509).
Direct leased line installation/operations group, field engineering group, research and development group, and IP address allocation/DNS group. Responsible for all aspects of customer turn up and network troubleshooting, field installations, and new equipment testing. This includes upgrading national network to OC-3, OC-12, and OC-48 circuits. Integrate DIGEX’s IP leased line network and Intermedia’s IP networks. Work with Department VP and Directors to design and implement network backbone and create departmental budgets.
Direct leased line installation/operations group, field engineering group, research and development group, and IP address allocation/DNS group. Responsible for all aspects of customer turn up and network troubleshooting, field installations, and new equipment testing. Deployed national network of over 50 POPs with DS-3 connectivity. Work with Department VP to design and implement network backbone and create departmental budgets.
Manage Leased Line Installers responsible for turn up and configuration of customer leased lines. Assist in day-to-day turn up of customer leased lines. Manage Research and Development Coordinator for leased line business unit. Manage Purchasing Coordinators for leased line business unit. Maintain ARS Server and support order entry system. Define and maintain configuration standards for both DIGEX and CPE routers. Work with director to design and implement network backbone as company grows. Troubleshoot network problems as they arise. Perform IP address allocation and work with NIC to acquire more address space when necessary.
Sole person responsible for turn up and delivery of customer leased lines. Responsibilities include specifying, ordering, installing, troubleshooting, and customer service of: leased lines, equipment and software. Work with manager to design and implement network backbone as company grows. Design and implement online order entry system to replace existing paper system using Remedy's Action Request System (ARS). Integrated trouble ticket system with order entry system to track customer outages (using ARS). WAN equipment includes: Cisco routers, T1 CSU/DSU, DDS CSU/DSU, T1 Channel Banks, other routers as necessary, customer servers as necessary.
Design and implement large scale LANs and WANs. Responsibilities include specifying, installing, and configuring, equipment and software. Troubleshooting problems and contacting vendors as necessary. Sample Projects include: customer LAN & Application integration with INTERNET services, Multiple office LAN interconnection via leased circuits, Voice system interconnection via leased circuits. LAN equipment experience includes: RS-232, Ethernet (NICs, Concentrators, Managed Hubs), NetWare Fileservers, UNIX workstations (UnixWare, SUNOS/Solaris, HP-UX). WAN equipment experience includes: Bridges, Routers, Gateways, CSU's/DSU's, T1 MUX's, T1 Encryption.
Manage COMSAT Labs' fiber-optic backbone and all networked equipment in the Systems Development Division (SDD) of the Labs. Responsibilities include: Installing equipment and software, day-to-day maintenance, troubleshooting problems as they arise, supervise technicians. Networked SDD equipment includes Macs, PC’s, DECstations, HP/Apollos, HP 9000/300, SUN Sparc IPX, SynOptics 3000 Hub, Cisco IGS Router, HP Remote Bridges, Cabletron MMAC Hubs, UTP cable plant, QMS printers (820, 2000, ColorScript). Programming projects include developing MS-Windows applications, providing a client/server shell between VAX and DECstation using DECnet protocol, and porting C/UNIX programs between platforms.
Responsible for developing, modifying, and installing systems software on UNIX based machines. Programming done primarily in "C" with some csh scripts included. Programming experience on: SUN 3, SUN SPARCstation, DECstation 3100, VAX.
Responsible for daily operation and support of the County's IBM 3090, Emergency Services' (2) DEC PDP11/70s, and the maintenance of various telecommunication networks. IBM 3090 work included scheduling/ running of various jobs for all departments in County Government, maintenance of tape libraries, and distribution of reports. Emergency services work involved maintaining machines and peripherals used for the County's Computer Aided Dispatching system (911 call center, police, fire, and ambulance dispatch). Network experience involved trouble-shooting various terminal/printer problems on multiple leased line networks and dealing with telecom and equipment vendors.