Networks · Systems · Software

Brady Walsh Senior Network Engineer · Technical Consultant · Software Developer

I’ve spent the last 16 years working across networks, systems, and software. I like getting into the details, figuring out what is actually going wrong, and leaving things easier to support than I found them.

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I’m most useful where systems overlap.

My background started in networking, but the work has never stayed in one lane. Over the years I’ve moved between infrastructure, operating systems, cloud services, and application code. I’m comfortable tracing a problem from a cable or packet capture all the way into a database query or a piece of code, and I still enjoy being the person who gets hands-on and figures it out.

Network & Systems Engineering

Networking is where I started, and it still shapes how I troubleshoot. I’m at home with routing, DNS, virtualization, and Windows, Linux, or macOS— whether the problem starts at the cable or farther up the stack.

Windows · Linux · macOS · Networking

Cloud & Identity Modernization

I’ve helped move Exchange, Microsoft 365, Active Directory, backups, and business applications out of aging environments and into cloud or hybrid setups that people can actually support.

Cloud · Identity · Microsoft 365 · Migration

Legacy Applications & Data

I don’t mind old code. I like learning why a system works the way it does, tracing the data behind it, and improving it carefully without disrupting the people who rely on it.

Application development · Data · Integrations

Automation & Software Delivery

If a repetitive process can be made safer or easier with code, I’ll usually find a way. That has included source-control migrations, CI/CD, test automation, and small tools that make day-to-day work less painful.

GitHub · CI/CD · Python · Java · Go

16 years Working in technology
Layer 1–7 Comfortable across the stack
~800 Endpoints currently managed

Different places, different problems

I’ve worked with organizations as large as Bank of America, GEICO, and Visa; regional businesses including HallKeen, United Ag & Turf, and United Construction & Forestry; and public-sector teams at the Commonwealth of Massachusetts and the City of Cambridge. I’ve also helped plenty of small, owner-operated businesses where being practical matters more than being fancy.

A few things I’ve worked on

The projects I remember best are the ones where I had to understand the whole problem, not just one piece of the technology. I’ve kept a few older projects here too—they are part of how I got here.

Work / 01

BMC integrations & delivery tooling

I rebuilt and developed Kubernetes integrations and supported a large Java ETL portfolio for BMC TrueSight Capacity Optimization and Helix, covering platforms such as SCOM, Splunk, AppDynamics, Elasticsearch, ServiceNow, and SolarWinds. I also helped replace an uncontrolled merge-to-master workflow with tests, GitHub Actions, Nexus, SonarQube, and pull-request reviews. The products are used by an estimated 100 to 150 enterprise customers, and I’m now responsible for support across roughly 14 Python-based Dynatrace extensions along with JSON views and dashboards.

Java · Python · JSON · GitHub Actions · Nexus · SonarQube

Work / 02

CDV Fund member platform

I replaced a decades-old Access and Excel workflow with a Next.js web application running in containers on Kubernetes in Azure. Staff now use it for daily administration, claims, payments, and reporting, while more than 1,500 members have registered for online self-service. I also moved the organization’s informational website to WordPress over a Christmas holiday when its previous hosting provider shut down.

Next.js · Kubernetes · Azure · Payments · WordPress

Work / 03

Microsoft cloud & identity migrations

I’ve led complete migrations across multiple tenants, including Exchange 2010 through 2019, SQL Server, on-premises Active Directory, Azure AD/Entra ID, Teams, SharePoint, and Microsoft 365. One recent provider handoff was staged over several weeks with no downtime; another Exchange upgrade was completed over a weekend through an intermediate server migration. On one project, I also replaced an unnecessary $500 certificate with Let’s Encrypt.

Microsoft 365 · Entra ID · Exchange · SQL Server

Work / 04

Massachusetts Health Connector systems

I led the move of about 100 mailboxes and roughly 4 TB of archived email from hosted Exchange to Office 365, handling the design, vendor coordination, cutover, and user support. I also replaced two T1 lines with 100 Mbps symmetrical fiber, supported the existing Cisco phone system, and helped move server infrastructure from Windows Server 2003 to 2012 R2 with VMware and an HP SAN. From 2014 to 2018, I maintained and expanded the Appeals Access databases used by a five-person team serving residents statewide.

Networking · Office 365 · Cisco · VMware · Windows Server · Access

Work / 05

Corona Test Centers launch

In April 2020, I built the production environment for a COVID-19 testing information service. I installed the Dell hardware in the data center, configured iDRAC, VMware vCenter and ESXi, and deployed the Ubuntu, Lucee, Docker, MySQL, development, and backup environment. It went from hardware and software procurement to production in one week, then I handed it over to the team that would maintain it.

Dell · VMware · Ubuntu · Docker · MySQL · Lucee

Joanna Shea O’Brien portfolio website shown on a laptop

Archive / 06

Joanna Shea O’Brien site

A compact portfolio site I designed and built for an independent artist in 2017. It was one of my first complete public web projects, built with HTML, Sass, and JavaScript and deployed as a static site through GitHub Pages.

Web design · HTML · Sass · JavaScript · Jekyll

Visit site
Network diagram from the In the Cloud senior project

Archive / 07

Wentworth “In the Cloud”

My Wentworth senior project: a working Citrix environment in AWS that extended a client network through a site-to-site VPN and DNS integration. We built the lab with a zero-dollar budget and documented the design in our final presentation.

AWS · Citrix · VPN · DNS · pfSense

View presentation
Illustration representing the writing archive

Archive / 08

Blog archive

Notes from school, side projects, cloud experiments, and the beginning of my career in consulting. They are old, occasionally rough around the edges, and still worth keeping as a record of what I was learning at the time.

Technical writing · Experiments · Lessons learned

Browse the archive

03 / Contact

Have something tricky to figure out?

Complicated, old, and hard-to-explain problems are usually the interesting ones. I’m always happy to talk through an idea, compare notes, or see if I can help. If you need the formal version, my résumé is available by request.

[email protected]