01 / ARCHITECTURE
Enterprise Infrastructure Architecture
High availability, disaster recovery, platform sizing, replication, storage, operational readiness, enterprise standards, and complex integration.
Enterprise Infrastructure Architect · Platform Engineering · SRE
William Wesley
Mangum
Four decades of cross-domain technology experience spanning IBM mainframe, UNIX/Linux, distributed systems, databases, application platforms, security, DevOps/GitOps, SRE, automation, cloud-native architecture, and legacy modernization.
4Decades across enterprise technology generations
30+Successful BCP simulation events
100sApplications onboarded in enterprise environments
1000sServers supported through architecture and operational readiness
Depth + Breadth
Technology leadership across the full stack.
A career built on bridging silos: legacy and modern platforms, infrastructure and applications, operations and engineering, data and middleware, reliability and delivery, security and governance.
02 / RELIABILITY
SRE + Problem Management
Production incident leadership, awarded `Problem Management Champion`, root-cause analysis, privileged operations coordination, performance engineering, and repeatable operating practices.
03 / MODERNIZATION
Legacy-to-Modern Engineering
Mainframe-to-UNIX migration, cross-platform automation, container-targeted modernization, cloud-native patterns, and reusable migration frameworks.
04 / DATA
Database Architecture + Performance
Oracle RAC, SQL tuning, schema and index optimization, OLTP/batch workload analysis, PostgreSQL, DB2, SQL Server, MySQL, and data migration.
05 / AUTOMATION
Automation + Developer Productivity
PowerShell 7, Bash/Korn shell, Python, JavaScript/TypeScript, C/C++, Groovy, CI/CD, reusable tools, dashboards, code generation, and deployment engineering.
06 / SECURITY
Security Operations + Access Governance
IAM/IGA, roles, entitlements, lifecycle controls, SOX evidence, UNIX/Linux security operations, audit support, and enterprise governance.
Technology Map
From assembler to agentic engineering.
Practical experience ranges from IBM mainframe and low-level systems work to modern Kubernetes, GitOps, cloud platforms, JVM ecosystems, cross-platform scripting, AI-assisted engineering, and MCP.
Cloud + Containers
Microsoft AzureDockerKubernetes
OpenShiftPodmanKinD
kubeadmk3sHelmArgo CD
Operating Systems
z/OSOS/390MVSVSE
AIXHP-UXSolarisLinux
WindowsRHELSLESUbuntuNixOS
Data Platforms
OracleRACPL/SQLPostgreSQL
SQL ServerDB2MySQLMongoDB
RedisSQLiteDuckDB
Languages
C/C++JavaJavaScriptTypeScript
C#Visual BasicGroovyScala
PowerShell 5/7PythonPerlBash/Korn
REXXAPLAssemblerGoHaskell
Application + JVM
SpringHibernateTomcat/JSPApache Camel
Spring BootQuarkusMicronautGraalVM
WebLogicSOA SuiteOracle APEX
DevOps + SCM
GitGitHubGitLabJenkins
MavenGradleSubversionArtifactory
ChangeManPVCSClearCase/ClearQuestCI/CD
AI + Agentic
ChatGPTOpenAI CodexAI-Assisted Coding
Agentic EngineeringModel Context Protocol (MCP)
Security + Resilience
IAMIGAKeon/BOKSPowerBroker
SOX ControlsHigh AvailabilityBCPDisaster Recovery
SAN/NASBCV/SRDF
Selected Experience
Engineering through multiple technology eras.
Selected roles highlight enterprise architecture, consulting, migration engineering, production reliability, technical leadership, and systems integration.
2024 — PRESENT
Recent Engineering & Architecture
Modernization · Productivity Engineering · Cloud-Native
- Building productivity dashboards and REPL-style engineering tools across browser, PowerShell, WSL/Linux, NAS, Docker/Kubernetes, OpenShift, GitHub/GitLab CI/CD, APIs, and IBM Z.
- Modernizing a reusable enterprise migration framework with cross-platform PowerShell 7 and container/Kubernetes targets.
2006 — 2024
Wachovia / Wells Fargo
Enterprise Infrastructure Architecture · Platform Engineering · SRE · SecOps · Oracle DBA
- Helped scale a Corporate Finance infrastructure function from two people to more than twenty, while leading cross-organizational virtual teams.
- Designed and supported enterprise platforms spanning SOA Suite, APEX, OBIE, Informatica, WebLogic, Tomcat, Oracle RAC, Linux, security governance, HA/DR, and operational readiness.
- Led complex production problem management, SQL/database performance analysis, root-cause analysis, and stakeholder communication.
~2010 / 2011
Bank of America
Application Migration Consultant
Designed a reusable methodology and automation framework for a program targeting approximately 145 IBM-mainframe applications migrating to IBM RS/6000 AIX/UNIX, validating representative migrations and dramatically accelerating the engagement.
2002 — 2006
Serena Software, Inc.
Senior Consultant
Delivered senior consulting across mainframe, UNIX, Windows, Oracle, SQL Server, Java/J2EE, Spring, Hibernate, Tomcat/JSP, .NET, ETL, automation, and systems integration.
1997 — 2002
Bank of America Corp. — Technology & Operations
Vice President / Senior Consultant-Architect
Architected enterprise SCM and lifecycle solutions spanning mainframe and distributed environments, built production infrastructure across four regional data centers, and managed technical teams across three locations.
1988 — 1997
Computer Task Group — Enterprise Consulting Group
Senior Consultant
Member of Elite `Enterprise Consulting Group`, consistently in top 10 revenue producers at CTG
Delivered cross-domain enterprise consulting in banking, networking, systems integration, warehouse integration, data movement, UNIX, mainframe, Oracle, and modernization projects.
1981 — 1988
Earlier Career
IBM · Application Software Corporation (Owner) · Backroom Systems Group / Mellon Bank
Established an early foundation in productivity engineering, APL, IBM-mainframe integration, automated-warehouse software, C, assembler, and difficult systems recovery work.
Contact
Let’s solve the difficult technology problem.
Enterprise architecture, modernization, reliability engineering, automation, platform engineering, database performance, migration strategy, and complex systems integration.