Nathaniel Hasenfus

Experience

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  Stevens Linen Associates Inc.

  Jan 2005 - Jan 2008

  IT Consultant

  - Established Standard Operating Procedures for scheduled Information Systems Management tasks. - Performed new hardware/software installations for business-critical workstations. - Provided in-person technical support for personnel at all levels of the business. - Maintained server hardware/software including Microsoft Active Directory, DNS, DHCP, and INMASS database management systems. - Performed Fiscal Period End Processing tasks. - Installed and maintained Local Area Network infrastructure. Show less

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  SR2 Software

  Oct 2007 - Aug 2008

  IT Technician

  I worked for Steve Umbriano at Cornerstone Systems Inc as an IT support technician.- Provided technical support services for clients ranging from a variety of small businesses to multi-site, county-wide systems. - Supported remote end-users using VPN technology to access office systems and applications. - Coordinated with software and hardware vendors to resolve customer issues. - Installed and upgraded Windows XP/Vista and Windows Server 2003 systems. - Configured, installed, and tested new Sonicwall security appliances for new or existing Internet connections. - Maintained client software and hardware including workstations, servers, network devices, office productivity applications, anti-virus solutions and line-of-business applications. Show less

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  SwiftecIT, Inc

  Aug 2008 - Dec 2011

  Sr. IT Technician

  - Migrated existing systems to new servers including SBS 2003/2008/2011, Server 2003(R2), and Server 2008(R2).- Migrated from Exchange 2003 to Exchange 2007 and Exchange 2010.- Migrated domains from POP e-mail to Exchange server.- Migrated from Novell Netware 5 file servers to Netware 6.5 file servers.- Setup SPAM filtering for multiple domains using Barracuda SPAM Firewall.- Malware cleanup/removal on workstations.- Setup clustered secondary nameserver for multiple public DNS domains.- Converted/migrated multiple existing servers to virtual machines on VMware ESXi server.- Implemented vSphere environments with HA clustering and redundant SAN storage systems.- Designed/Tested/Implemented internal network improvements to increase LAN/WAN resiliency.- Participated in alpha testing of new hyper-converged virtualization solution. Show less

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  AKUITY Technologies

  Dec 2011 - May 2018

  Sr. Project Engineer

  - Designed & implemented robust virtualization environments based on VMware vSphere, Cisco/Extreme switching and Dell EMC Unity/VNX(e), Nimble, and NetApp storage systems. - Management and configuration of storage systems from vendors including Dell EMC, NetApp, Dell, and IBM. - Scoped, planned, and executed Microsoft Exchange Server migrations including multiple server, redundant environments with CAS array, DAG, and load balancer components.- Implemented security solutions including firewall, web filter, spam filter, and VPN appliances from vendors including Cisco, Sonicwall, Juniper, Fortinet, Sophos, and Palo Alto Networks. - Worked with Ethernet switches, routers, and WiFi solutions from Cisco, HPE ProCurve, 3com, Extreme/Enterasys, Adtran, Ruckus, and Aerohive. Show less

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  UMass Memorial Health Care

  May 2018 - Feb 2020

  Sr. Wireless Network Engineer

  Supported enterprise network across the largest health system in central Massachusetts, including seven hospitals and about eighty remote office locations.Focused on identifying and implementing network optimizations by examining existing configurations, current status, and topology. Optimization work includes:Correcting STP root bridge and HSRP/VRRP master designations.Correcting inconsistent routed uplinks.Disabling ICMP redirects, enabling UDLD, and enabling BFD to improve failure detection, convergence times, and optimize routing. Learned network monitoring / management tools and promoted usage to save time, increase productivity, and proactively identify issues to be addressed in order to prevent outages.Utilized NetMRI for configuration management, configuration deployment, and issue identification. Utilized NetBrain for network topology mapping, configuration analysis, and issue identification. Utilized AKiPS for rapidly identifying endpoint to switch port mappings, tracking switch port utilization, and identifying interface status/errors. Utilized ExtraHop and Wireshark for network traffic analysis. Identified chronic connectivity issue due to endpoint AC adapters interfering with PoE operation. Contributed to projects by providing architectural advice, configuration/cut-over planning, and implementation work.Produced/implemented WiFi RF designs (Ekahau & AirMagnet) to modernize WiFi connectivity and increase coverage at multiple sites.In this environment, I have worked on technologies including:Cisco Catalyst 6800/4510/3850 switches for Campus LAN/WAN (mostly L3 routed at access w/OSPF)Cisco Nexus 7700/9500/9300/2200 (FEX) for Data Center (vPC/HSRP with OTV for DCI)Cisco Meraki MX/MS products for remote site LAN/WANCisco WLC 8540/5520, PI, MSE, and AP3700/3800 for wireless accessCisco ASR 1001x for Internet edge routing including eBGP peering with multiple ISPsF5 Big-IP 10250/5050 LTM for internal/external load balancing Show less

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  AKUITY Technologies

  Feb 2020 - Aug 2020

  Sr. Solutions Architect
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  UMass Memorial Health Care

  Aug 2020 - now

  Sr. Wireless Network Engineer