David Shannon
Liscannor,Co. Clare
Summary
Cloud systems engineer with proven expertise in managing AWS services and implementing public and private cloud solutions. Strong background in network and security engineering, including Cisco and Juniper technologies, firewall configuration, and DNS management. Experienced in scripting and automation using Python, alongside robust systems administration skills across various platforms. Adept at utilizing monitoring tools to optimize IT infrastructure and enhance organizational performance.
Overview
18
18
years of professional experience
4040
4040
years of post-secondary education
Work history
Senior Security Engineer
Digital River Ireland
02.2020 - 08.2025
- Managed, monitored and audited AWS VPC, RDS, Workspace and EC2 environments using console, AWS CLI and python/boto3.
- Spearheaded the process of Auditing the Production/Payments Environment to assess compliance with security standards for handling payment card data (PCI).
- Created lambda backup scripts to automate Cisco IOS and VPC config backups to help reduce cost, admin workload and help with downtime after issues.
- Managed Microsoft Exchange Email security, auditing suspect mails, and managing ETRs, working to strengthen defences against phishing, malware, and other related threats.
- Incident Analysis and Response using Service Now, ReliaQuest and MS Defender. Assisted research & post incident analyses, end user protection and remediation.
- Worked on SSO integrations for services, streamlining services access for employees.
Senior Network Engineer
Digital River Ireland
03.2017 - 10.2021
- Oversaw network operations and security across 3 datacentres and, at a peak, 5 office locations.
- Worked on private cloud in a co-located datacentre, from unboxing servers and network equipment, configuring network configurations and server console access to adding the whole cloud to production.
- Designed/implemented network for several office moves.
- Plan, Schedule and Perform upgrades/patching and implement configuration changes of networking devices.
- Set up and daily administration of Cisco ASA & Firepower, PFSense, and Juniper firewalls.
- Monitoring and config backup using Solarwinds and then LibreNMS.
Senior Network & Telecoms Administrator
Digital River Ireland
05.2012 - 03.2017
- Managed network and telecom (Avaya and then Cisco Call Manager) infrastructure, ensuring high availability and security.
- Led office moves and co-location datacentre installations.
Datacentre Operations Administrator
Digital River Ireland
05.2011 - 05.2012
- Installed and configured private cloud servers and VMware.
- Managed datacentre hardware and software.
Systems Administrator
Digital River Ireland
06.2007 - 05.2011
- Provided systems administration and desktop support across various platforms.
Education
Bachelor's degree - Electronic Engineering
NUI Galway
CCNA Certification - Network Engineering
Cisco
AWS Certified Cloud Practitioner Certification - Cloud Computing
Amazon Web Services
Skills
- Cloud systems engineering
- AWS services management
- Public and private cloud installations
- Network and security engineering
- Cisco and Juniper networking
- Firewall configuration and management
- DNS and domain management
- Scripting and automation
- Python programming
- Systems administration across platforms
- Monitoring tools expertise
Custom Section
AWS EC2, VPC, Route 53, S3, Lambda, via the console and python, Public and private cloud installations and management, Cisco IOS Switching & Routing, ASA Firepower, PFSense, Juniper, Checkpoint firewalls, DNS and domain registration/management (Route 53 and NSOne), Python scripting for AWS management and auditing, AWS CLI, Created lambda scripts for VPC and IOS configuration backup to S3., Proficient in Linux, Windows, MacOS, MS Defender, Exchange, Solarwinds, Zabbix, LibreNMS, ServiceNow
Personal Information
Title: Senior Security Engineer
Affiliations
- Guitar, Clock Fixing, jiu-jitsu
Timeline
Senior Security Engineer
Digital River Ireland
02.2020 - 08.2025
Senior Network Engineer
Digital River Ireland
03.2017 - 10.2021
Senior Network & Telecoms Administrator
Digital River Ireland
05.2012 - 03.2017
Datacentre Operations Administrator
Digital River Ireland
05.2011 - 05.2012
Systems Administrator
Digital River Ireland
06.2007 - 05.2011
Bachelor's degree - Electronic Engineering
NUI Galway
CCNA Certification - Network Engineering
Cisco
AWS Certified Cloud Practitioner Certification - Cloud Computing
Amazon Web Services
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