Sean O'Connell

Las Vegas, Nevada

Sysadmin, network engineer,
and software developer.

Status

On hiatus

Contact

Email

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Summary

  • Data center and cloud services architect and engineer with a background in global-scale internetwork design and implementation.
  • An information technology veteran with over twenty five years of progressive experience in the industry.
  • A well-rounded generalist, capable of integrating multiple domains of knowledge to bring a unique skillset to problem solving and solutions design.
  • Expert in Linux enterprise systems engineering, as well as network engineering and administration.
  • Application, automation, and web developer with a DevOps background and experience supporting Agile development teams in the delivery of production code.

Skills

Systems engineering

  • Red Hat Enterprise Linux (RHEL) / CentOS
  • Ubuntu Server / Debian
  • SUSE Linux Enterprise Server (SLES) / openSUSE
  • Network application and infrastructure services
  • Email and communication services
  • MariaDB/MySQL/PostgreSQL administration
  • Podman, Docker, and Docker Compose
  • KVM/QEMU virtualization
  • Ansible configuration management and automation
  • Advanced shell scripting
  • LAMP/LEMP stacks
  • DNS/DNSSEC administration

Network design and engineering

  • IPv4 and IPv6
  • EIGRP, OSPF, BGP
  • Enterprise LAN/WAN routing and switching
  • VPN and remote access solutions
  • Cisco routing, switching, and wireless platforms (ISR, Catalyst, Nexus, Aironet, Meraki)
  • Cisco and Checkpoint firewall platforms

Development

  • Python application development (CLI tools, network automation, Atlassian integration)
  • Web application backend development (PHP, Python)
  • Jenkins CI/CD automated pipelines
  • Varying familiarity with other programming languages (Emacs Lisp, Lua, Groovy, Javascript, C/C++)
  • Atlassian JIRA and Confluence
  • Agile framework and methodologies (experience with Scrum, Kanban, and Scrumban)
  • Developer and maintainer of the nrrdtools project
  • Personal git repo at github.com/sdoconnell

Information Security

  • Network security platforms (RSA NetWitness, FireEye Email Security, IXIA BreakingPoint)
  • Network security design, implementation, and auditing
  • Penetration testing, incident response, forensics
  • Administration of firewalls, IDS/IPS, log aggregation, RADIUS/TACACS+
  • Compliance implementation and validation (PCI DSS, HIPAA)

Experience

Information security engineer

Wells Fargo (NSAE)

Charlotte, NC

2019-2021 (24 mo contract)

Details

Member of the bank’s Network Security Advanced Engineering group. Created automation of previously manual procedures for lab environment provisioning and the testing and certification of network security applications. Automation based on Ansible and/or bespoke Python code (varied by application platform). Orchestration via Jenkins and dynamic Groovy-based pipelines. This automation work radically increased testing and certification velocity for multiple network security platforms (reducing 3-4 week timelines to 1-2 days), and facilitated a level of security platform testing that was previously impractical or impossible for the NSAE team.

Technology consultant

POD7, LLC.

Sioux Falls, SD

2017 to present

Details

Freelance consulting and technology services. Project planning, design, and remote implementation for office moves/consolidations and data center relocation. Remote support, security analysis, and disaster recovery consulting.

Information security engineer

Wells Fargo (NSPAE)

Charlotte, NC

2016 (10 mo contract)

Details

Member of the bank’s Network Security Policy Analysis and Enforcement group. Performed discovery, audit, and analysis of third-party network connections to ensure compliance with bank security policy. Designed and implemented firewall policy changes for production financial applications.

Contract consultant

Mood Media

Fort Mill, SC

2014-2015 (12 mo contract)

Details

Infrastructure design and implementation, support of global operations, problem resolution for escalated issues.

Transitioned in 2014 from full-time roles to contract and freelance project-based employment.

Enterprise architect

Mood Media

Fort Mill, SC

2012-2014

Details

Engineered and implemented the North American and European data services and content delivery networks, as well as backoffice and hosting data centers in North America and western Europe. Direct report to the Global VP, Information Technology; dotted line report to the Global Chief Information Officer.

Senior network and systems engineer

ORCS Web

Charlotte, NC

2011-2012

Details

Member of ORCS Web's Architecture team. Provided customer-focused network and systems engineering and implementation services. Designed, deployed and supported internal network, systems, and storage infrastructure within the company's Charlotte data center.

Senior network and systems engineer

Hawkeye FFWD Ltd.

Charlotte, NC

2008-2011

Details

Responsible for all facets of the operation of Hawkeye's Charlotte, Dallas, and Seattle data centers, as well as a global network infrastructure spanning North America, Europe, and Asia. Engineered and supported a scalable, secure web services environment that hosted mission-critical content for such companies as Microsoft, Cisco, and Bank of America.

Network services manager

Northeast Medical Center

Concord, NC

2005-2008

Details

Managed and supported the data center, medical application systems, and wired/wireless data infrastructure of this large regional hospital. Managed a team of seven engineers. Performed the design, project planning, coordination, asset management, and deployment of many large technology-driven hospital expansions.

Network and systems engineer

Venturi Partners

Charlotte, NC

2003-2005

Details

Provided technology support and services to Venturi's 130 field offices, as well as engineering and administration of the company's Charlotte headquarters and data center. Managed the company's North American wide area network footprint, Internet edge, and network security infrastructure.

Solutions provider

Blackrazor

Charlotte, NC

2001-2003

Details

Performed network, systems, and application support services including infrastructure design and implementation, technology consulting, network and systems support, and application development.

Consulting engineer

Westar Technologies

Charlotte, NC

1996-2001

Details

Architected and implemented Westar's business ISP offering and co-location data center, and provided technology support services and consulting to the company’s enterprise and SMB customer base.