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Daryll Raymundo

@daryllraymundo

Systems Administrator at MarketAxess Holdings & Pragma Resources LLC who implemented resilient BGP and HSRP routing for the New York office.

United States

Message

At MarketAxess Holdings & Pragma Resources LLC, I implemented a resilient multi-ISP routing design for the New York office using BGP and HSRP, strengthening network availability. I also configured RADIUS authentication, ACLs, NAT, and VLAN segmentation to support secure network access.

I supported infrastructure across four datacenter sites and maintained network connectivity for employees across multiple offices. My work included managing VMware, Active Directory, Microsoft 365, endpoint security, and patching, as well as supporting disaster recovery through scheduled backups.

Experience

Work history, roles, and key accomplishments

Systems Administrator - Network & Security

MarketAxess Holdings & Pragma Resources LLC

Jun 2022 - Nov 2025 (3 years 5 months)

Maintained reliable network connectivity for 100+ employees across multiple sites, implemented resilient multi-ISP routing with BGP and HSRP, and strengthened security through RADIUS, ACLs, NAT, and VLAN segmentation. Managed Active Directory, VMware, NetApp, Microsoft 365, and security monitoring tools.

Cisco BGP HSRP RADIUS ACLs NAT VLAN LogRhythm Sophos Central Crowdstrike Active Directory DNS DHCP VMware ESXi VCenter NetApp CIFS NFS Microsoft 365 Microsoft Intune Patch Management Disaster Recovery

IT Systems Engineer, Contract

Willowglen

Aug 2020 - Nov 2020 (3 months)

Deployed and managed VMware ESXi 7.0 virtual machines running Windows Server workloads, and maintained enterprise routing, switching, firewalls, and VPN connectivity to support secure and stable network operations.

VMware ESXi Windows Server Routing Switching Firewalls VPN

IT Systems Engineer, Contract

Denselight

Apr 2018 - Aug 2018 (4 months)

Reorganized and maintained Active Directory, DNS, and DHCP environments to improve consistency and operational reliability. Managed end-user, server, and network support, onboarding/offboarding, access provisioning, licensing, vendor coordination, and Jira requests.

Active Directory DNS DHCP end user support server support Network Support Jira

IT Systems Administrator

Crown Worldwide

Mar 2016 - Aug 2017 (1 year 5 months)

Deployed and managed VMware ESXi 6.5 virtual machines supporting Windows Server environments. Resolved hardware, software, server, and network issues while administering user lifecycle management, Microsoft 365 licensing, vendor coordination, on-call support, and Jira tickets.

VMware ESXi Windows Server Hardware Support Software support server support Network Support Microsoft 365 Jira

IT Analyst

Alta Resources

Oct 2013 - Mar 2016 (2 years 5 months)

Maintained enterprise network infrastructure, including DNS, DHCP, routing, switching, firewalls, and VPNs, while managing provisioning, vendor support, and Jira-tracked service requests.

DNS DHCP Routing Switching Firewalls VPN Jira

Computer Technician

MIGS

Jun 2006 - Oct 2008 (2 years 4 months)

Provided end-user support for endpoint, network, and software issues; managed user-access provisioning, documentation, inventory, and vendor coordination.

end user support Network Support Software support Access Provisioning Documentation Inventory Management Vendor coordination