David Undernehr
Tulsa,OK
Summary
Dynamic and highly experienced Network Engineering Leader with 20+ years in enterprise, service provider, and Oil & Gas OT environments. Demonstrated success in leading teams, modernizing infrastructure, automating network operations, and aligning solutions with business goals. Skilled in network architecture, security, wireless, voice, compliance, and automation. Passionate about mentorship and continuous improvement.
Overview
26
26
years of professional experience
1
1
Certification
Work History
Manager, OT Network Engineering
ONEOK, Inc.
01.2014 - Current
- Lead engineering support for hundreds of OT sites and two enterprise data centers (Tulsa & Dallas).
- Designed and implemented DMVPN overlay leveraging MPLS, LTE, and VSAT with network segmentation.
- Drove automation with Nautobot, GitLab, Ansible, and Python/Nornir.
- Developed dynamic provisioning workflows and compliance dashboards (ISE, OpsView, LiveAction).
- Validated embedded cellular modems in Cisco platforms for increased telemetry.
- Built and maintained lab environments for modem testing, transport failover, and IOS validation.
- Created Splunk dashboards for multicast, bandwidth, and configuration anomaly detection.
- Collaborated with InfoSec on transport security and internal audit controls.
- Mentored junior engineers and created SME Champion Program (Splunk, NetBrain, Nautobot).
- Led device lifecycle upgrades, EOS/EOL planning, and quarterly reviews with leadership.
Network Engineer (Contract)
QuikTrip Corporation
01.2013 - 01.2014
- Built DMVPN with ASR1001 HUBs and 2800/2900 ISR spokes using mGRE, IP SLA, and EEM.
- Installed Cisco Nexus 1000v VSM/VEM, HP22 FEX, 5596 and 7009 switches for VDI.
Network Engineer
Atlas Pipeline
01.2012 - 01.2013
- Deployed MPLS CE routers with BGP/OSPF, VoIP, and wireless infrastructure.
- Managed SCCM 2012 infrastructure and patching across 10 DPs.
- Installed Palo Alto 2050s (HA) with GlobalProtect and OSPF routing.
- Built FreeBSD syslog servers and GNS3 network replicas.
- Utilized SolarWinds, NetFlow, and IP SLA for monitoring.
Network Engineer (Contract)
City of Tulsa
01.2011 - 01.2012
- Migrated to Layer 3 design with Nexus 7K and QoS for VoIP rollout.
- Transitioned Brocade to Cisco, designed Trusted DMZ, and deployed ASA firewalls.
Network Analyst
QEP Resources Inc.
01.2008 - 01.2011
- Maintained CUCM, SRST, and T1 gateways; deployed VoIP to >100 users.
- Managed WiFi (Xirrus), voice recording (CallRex), and config backups (RANCID).
- Supported Riverbed appliances and documented using DNA, Wireshark, and Visio.
Infrastructure Specialist
EDS (HP Enterprise Services)
01.2004 - 01.2008
- Supported 4,500+ Cisco/F5/DWDM devices; diagnosed out-of-band and WAN issues.
- Maintained Alteon SSL VPN and Citrix WANScaler environments.
Technical Analyst II / Network Analyst II
WilTel Communications
01.1999 - 01.2004
- Monitored core IP routers and escalated Tier 3 issues for NOC.
- Supported ATM circuits and DWDM backbone with proactive log analysis.
Education
High School -
Sapulpa High School
Sapulpa, OKUniversity of Phoenix
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Northeastern State University
Tahlequah, OKCisco Networking Academy
Tulsa Technology Center
Skills
- Networking & Protocols: IP, EIGRP, OSPF, BGP, DMVPN, IPsec, QoS, Multicast, Frame Relay, ATM
- Routing & Switching: Cisco Catalyst 9K, ISR/ASR, Nexus (1K–7K), Arista Spine/Leaf, HSRP, VRRP
- Security: Cisco ISE, Palo Alto (Panorama, LSVPN, GlobalProtect), ACLs, ASA 5520/5540, F5 SSL VPN
- Wireless: Cisco, Xirrus, Ubiquiti, WLANPi, Oscium, WPA2/Radius
- Automation: Nautobot, GitLab, Ansible, Python, Nornir, NaPalm, FreeBSD scripting, API integrations
- Monitoring & Management: Splunk, LiveAction, OpsView, NetBrain, SolarWinds, HP OpenView, NetQoS, NetCool, RANCID, Wireshark
- Voice & UC: CUCM v4–v101, Unity, SRST, SIP/H323, MGCP, SCCP, ShoreTel, CallRex, Cisco Attendant Console
- Platforms & Tools: Cisco Catalyst Center, Arista CloudVision, NetBrain, Nautobot, SCCM 2012 SP1, VMware vCenter, CML/GNS3, Visio, Remedy, SecureCRT/Putty, Linux
Certification
- CCNP ENCOR, ENSLD, ENAUTO – In progress (Target: Dec 2025)
- CCNA – Expired
- Cisco: CVOICE, CIPT1/2, TUC, PIX 9.x
- F5: LTM/GTM v4.x and v9.x
- Automation & Monitoring: Ansible (Kirk Byers), NetBox (Cioara), Network to Code 2019, NetQoS, Netcool Reporter, Opsware NAS
Timeline
Manager, OT Network Engineering
ONEOK, Inc.
01.2014 - Current
Network Engineer (Contract)
QuikTrip Corporation
01.2013 - 01.2014
Network Engineer
Atlas Pipeline
01.2012 - 01.2013
Network Engineer (Contract)
City of Tulsa
01.2011 - 01.2012
Network Analyst
QEP Resources Inc.
01.2008 - 01.2011
Infrastructure Specialist
EDS (HP Enterprise Services)
01.2004 - 01.2008
Technical Analyst II / Network Analyst II
WilTel Communications
01.1999 - 01.2004
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Northeastern State University
Cisco Networking Academy
Tulsa Technology Center
High School -
Sapulpa High School
University of Phoenix
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