Lead Engineer L3 Middleware

Presidio Where Teamwork and Innovation Shape the Future
At Presidio were at the forefront of a global technology revolution transforming industries through cutting-edge digital solutions and next-generation AI. We empower businesses - and their internal customers - to achieve more through innovation automation and intelligent insights.

KEY RESPONSIBILITIES

Escalation & Complex Incident Resolution

• Serve as the definitive escalation authority for all P1/P2 incidents across the middleware stack
• Lead war-room bridge calls; drive structured incident resolution with clear action plans and stakeholder communication
• Perform deep-dive root cause analysis (RCA) using heap dump analysis GC log review network traces and vendor diagnostic tools
• Engage IBM and Oracle vendor support (PMR/SR) with detailed diagnostic packages; drive cases to resolution
• Author comprehensive post-incident reports (PIR) with permanent corrective actions timeline analysis and SLA impact assessment
• Establish and maintain the escalation runbook library; coach L1/L2 on escalation procedures and decision trees

IBM WebSphere Application Server

• Design and maintain WAS Network Deployment cell topologies high-availability configurations and session persistence strategies
• Perform advanced JVM tuning: GC policy selection (gencon balanced) heap sizing compressed references JIT optimization
• Diagnose complex class loader conflicts memory leaks thread contention and connection pool exhaustion using IBM GCMV IBM Thread and Monitor Dump Analyzer and Eclipse MAT
• Design and oversee WAS to WebSphere Liberty or OpenShift migration blueprints
• Implement and validate security configurations: LDAP RACF SSL/TLS mutual authentication JAAS application security policies
• Provide architecture guidance for WAS ND clustering HTTP server (IHS) plug-in configuration and WebSphere eXtreme Scale (WXS)

IBM MQ

• Design IBM MQ cluster architectures including full repository partial repository and gateway queue managers
• Architect MQ high-availability solutions: MQ multi-instance queue managers (RDQM) MQ HA with NFS/GPFS MQ on OpenShift
• Troubleshoot MQ cluster routing message affinity issues back-out threshold failures and channel security (TLS/CHLAUTH)
• Implement MQ Advanced Message Security (AMS) TLS mutual authentication and channel authentication rules
• Diagnose and resolve complex MQ performance bottlenecks: disk I/O saturation channel congestion large message handling
• Architect migration path from on-premises MQ to IBM MQ on OpenShift or IBM Cloud Pak for Integration

IBM API Connect

• Architect IBM API Connect v10 deployments on OpenShift: Management Analytics Developer Portal and Gateway subsystem sizing and HA design
• Design API lifecycle governance: version management rate limiting OAuth 2.0 / OIDC security schemes API product publishing
• Troubleshoot complex API policy assembly failures GatewayScript errors and DataPower integration issues
• Implement API observability: custom analytics dashboards alerting correlation with backend service traces
• Lead API Connect cluster upgrades certificate rotation procedures and disaster recovery testing

IBM DataPower Gateway

• Architect multi-domain DataPower deployments for DMZ internal and B2B integration patterns
• Design and troubleshoot complex XSLT transformations GatewayScript policies Web Service Proxies and Multi-Protocol Gateways (MPGW)
• Implement advanced security policies: XML threat protection schema validation WS-Security OAuth token enforcement
• Diagnose performance bottlenecks using DataPower probe latency graphs and IBM Support Advisor
• Architect DataPower Gateway Operator deployment on OpenShift; manage DataPowerService CR lifecycle

IBM Event Streams (Apache Kafka)

• Architect IBM Event Streams (Kafka) cluster topologies for throughput fault tolerance and geo-replication
• Tune broker configurations: replication factor ISR settings log retention consumer group rebalancing and compaction policies
• Diagnose consumer lag escalations partition leadership imbalances under-replicated partition alerts and ZooKeeper/KRaft quorum issues
• Design Kafka Connect pipelines Schema Registry integration and MirrorMaker 2 replication for DR
• Implement Kafka security: mTLS SASL/SCRAM topic-level ACLs and network policies on OpenShift
• Lead Event Streams operator upgrades topic schema migrations and Kafka version upgrades on OpenShift

Oracle WebLogic & Service Bus

• Architect Oracle WebLogic Server (WLS) domains: Administration Server Managed Servers Cluster configuration and Node Manager HA
• Design and tune WebLogic JVM parameters: heap metaspace GC policy Work Manager thread priorities
• Diagnose complex WLS issues: stuck threads slow drains deployment failures EJB/JPA performance JDBC multi-data-source failover
• Architect Oracle Service Bus (OSB) pipeline patterns: message routing content-based routing SLA alerting error handling frameworks
• Troubleshoot OSB proxy service failures business service timeouts WS-Security policy mismatches
• Design migration path from Oracle WebLogic/OSB to containerized Java runtimes on OpenShift (Quarkus Liberty Helidon)

OpenShift Platform & Middleware Migration

• Lead end-to-end middleware platform migration to OpenShift Container Platform (OCP 4.x)
• Design target-state architecture: Operator-based middleware management (IBM MQ Operator DataPower Operator Event Streams Operator WebSphere Liberty Operator)
• Define namespace strategy resource quotas pod disruption budgets node affinity rules and storage class selection for stateful middleware
• Establish GitOps-based middleware configuration management using ArgoCD/Tekton pipelines
• Design persistent storage architecture for stateful workloads: OpenShift Data Foundation (ODF) NFS block storage for MQ WAS Kafka
• Implement OpenShift network policy for middleware service mesh ingress/egress controls and TLS termination via Routes/Ingress
• Lead containerization of legacy WAS ND workloads using IBM WebSphere Migration Toolkit and Transformation Advisor
• Define migration waves cut-over strategies fallback plans and parallel-run testing frameworks
• Establish observability stack: OpenShift monitoring (Prometheus/Grafana) log aggregation (EFK/Loki) distributed tracing (Jaeger/Zipkin)

Architecture Governance & Advisory

• Serve as the Subject Matter Expert (SME) for all middleware technology decisions within the managed services engagement
• Conduct quarterly architecture reviews: capacity planning technology currency assessments EOL/EOS risk reviews
• Define middleware standards design patterns integration blueprints and reference architectures for client organizations
• Drive FinOps discipline for middleware workloads on OpenShift: resource right-sizing license optimization cost allocation
• Participate in pre-sales and solution design activities for new managed services engagements

REQUIRED QUALIFICATIONS

Education & Experience

• Bachelors degree in computer science Software Engineering or equivalent (advanced degree preferred)
• 10 years of enterprise middleware platform engineering architecture and operations experience
• 5 years of hands-on experience with IBM middleware products (WAS MQ API Connect DataPower Event Streams) in production environments
• 3 years of experience with Oracle WebLogic and/or Oracle Service Bus in enterprise-grade deployments
• 3 years of OpenShift or Kubernetes platform engineering experience including middleware workload containerization
• Demonstrated experience leading P1 incident resolution and RCA for mission-critical middleware platforms
• Proven track record of middleware platform migrations (on-premises to container / cloud)

Technical Depth

• Deep expertise in JVM internals: memory management GC algorithms class loading thread lifecycle
• Proficiency with diagnostic tools: IBM GCMV Eclipse MAT IBM Thread and Monitor Dump Analyzer JProfiler VisualVM yourkit
• Strong Linux/Unix systems administration: kernel tuning network stack disk I/O performance security hardening
• Proficiency in scripting: Bash Python or Groovy for automation of middleware operations tasks
• Deep knowledge of integration patterns: messaging pub/sub API gateway ESB event streaming synchronous/asynchronous patterns
• OpenShift/Kubernetes: Operators Helm CRDs RBAC network policies persistent volumes StatefulSets
• CI/CD and GitOps: Jenkins Tekton ArgoCD GitHub Actions
• Security: PKI/TLS management OAuth 2.0 OIDC SAML Kerberos integration with middleware platforms

PREFERRED CERTIFICATIONS

• IBM Certified Solution Architect IBM Cloud Pak for Integration
• IBM Certified System Administrator WebSphere Application Server (Advanced)
• IBM Certified MQ Administrator
• IBM Certified Associate Developer / Administrator IBM DataPower Gateway
• Oracle Certified Master Java EE Enterprise Architect or Oracle WebLogic Server
• Red Hat Certified Architect (RHCA) or Red Hat Certified OpenShift Administrator (EX280)
• Red Hat Certified Specialist in OpenShift Application Development
• Certified Kubernetes Administrator (CKA) or Certified Kubernetes Application Developer (CKAD)
• ITIL 4 Strategist or ITIL 4 Managing Professional

BEHAVIORAL COMPETENCIES

• Executive presence: ability to communicate complex technical issues clearly to C-suite and senior stakeholders
• Crisis leadership: calm decisive and authoritative during major incidents with high business impact
• Mentorship and knowledge transfer: proactive in upskilling L1/L2 engineers through coaching shadowing and documentation
• Strategic mindset: balances tactical operational demands with longer-term platform modernization roadmap
• Vendor management: skilled at driving IBM Oracle and Red Hat support organizations toward swift resolution
• Collaborative: works effectively across organizational boundaries (application teams network security infrastructure)
• Commitment to continuous improvement: drives automation self-healing and observability maturity initiatives

Your future at Presidio
JoiningPresidio means stepping into a culture of trailblazers - thinkers builders and collaborators - who push the boundaries of whats possible. With our expertise AI-driven analytics cloud solutions cybersecurity and next-gen infrastructure we enable businesses to stay ahead in an ever-evolving digital world.

Here your impact is real. Whether youre harnessing the power of Generative AI architecting resilient digital ecosystems or driving data-driven transformation youll be part of a team that is shaping the future.

Ready to innovate Lets redefine whats next-together.

AboutPresidio
Presidiois committed to hiring the most qualified candidates to join our amazing culture. We aim to attract and hire top talent from all backgrounds including underrepresented and marginalized communities. We encourage women people of color people with disabilities and veterans to apply for open roles at Presidio. Diversity of skills and thought is a key component to our business success.

At Presidio speed and quality meet technology and innovation. Presidio is a trusted ally for organizations across industries with a decades-long history of building traditional IT foundations and deep expertise in AI and automation security networking digital transformation and cloud computing. Presidio fills gaps removes hurdles optimizes costs and reduces risk. Presidios expert technical team develops custom applications provides managed services and enables actionable data insights and builds forward-thinking solutions that drive strategic outcomes for clients globally. For more information visit

Applications will be accepted on a rolling basis.

Presidio has a strong commitment to the community we serve and our employees. As an Equal Opportunity Employer we strive to have a workforce that includes the community we serve.

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Required Experience:

Senior IC