Mid Level Java Developer Jobs in Naperville, IL (NOW HIRING)

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  Deploy, configure, and support enterprise networking infrastructure, including switches, routers, firewalls, and wireless solutions.
  
  


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  Independently install and configure switch stacks of up to five switches, including:
  
  




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  Physical installation and cabling
  
  


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  Stack configuration and validation
  
  


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  VLAN creation and assignment
  
  


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  Trunk and access port configuration
  
  


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  Uplink configuration
  
  


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  Firmware verification and updates
  
  


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  Connectivity testing and deployment validation
  
  




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  Participate in network refreshes, migrations, and infrastructure expansion projects.
  
  


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  Create and maintain implementation documentation, network diagrams, and technical runbooks.
  
  


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  Assist with network assessments and recommend improvements to network performance, scalability, and reliability.
  
  

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  Provide Tier 1-3 support for client and internal network environments.
  
  


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  Troubleshoot and resolve routing, switching, wireless, VPN, firewall, and connectivity issues.
  
  


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  Monitor network performance and identify opportunities for optimization.
  
  


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  Respond to escalated incidents and assist with root cause analysis (RCA).
  
  


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  Participate in a manageable on-call rotation supporting production environments.
  
  


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  Maintain network documentation, inventory, and change management records.
  
  

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  Serve as a technical resource during implementations and support engagements.
  
  


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  Communicate project updates, technical recommendations, and issue resolutions to stakeholders.
  
  


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  Build strong relationships with clients through responsiveness, professionalism, and technical expertise.
  
  


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  Collaborate with end users, IT leadership, and third-party vendors to ensure successful outcomes.
  
  


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  Participate in client meetings and provide technical guidance on infrastructure best practices.
  
  

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  Work directly with vendors and OEMs to troubleshoot issues and coordinate support cases.
  
  


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  Assist with technology evaluations, solution recommendations, and best practice adoption.
  
  


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  Collaborate with senior engineers on complex infrastructure projects and escalations.
  
  


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  Contribute to continuous improvement initiatives and operational efficiencies.
  
  

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  3+ years of network engineering, network administration, or infrastructure support experience.
  
  


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  Strong knowledge of:
  
  




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  TCP/IP
  
  


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  Routing & Switching
  
  


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  VLANs
  
  


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  Spanning Tree Protocol (STP)
  
  


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  DNS & DHCP
  
  


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  Wireless Networking
  
  


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  Network Security Fundamentals
  
  




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  Experience deploying and supporting Cisco, Meraki, Aruba, Fortinet, or comparable enterprise networking technologies.
  
  


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  Ability to independently deploy and configure a 5-switch stack in a production environment while validating connectivity and performance.
  
  


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  Experience working across multiple technology disciplines such as networking, cloud, security, or systems infrastructure.
  
  


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  Strong troubleshooting and analytical skills.
  
  


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  Excellent verbal and written communication skills with a customer-first mindset.
  
  


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  Ability to effectively manage multiple priorities in a fast-paced environment.
  
  

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  Experience with Azure or AWS cloud environments.
  
  


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  Exposure to VMware and server infrastructure technologies.
  
  


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  Previous MSP, consulting, or client-facing IT experience.
  
  


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  Additional certifications such as Fortinet NSE, Security+, Azure certifications, or CCNP.
  
  

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  Growth-driven addition to an expanding engineering team.
  
  


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  Contract-to-hire opportunity with long-term career potential.
  
  


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  Exposure to diverse technologies and client environments.
  
  


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  Collaborative team culture with shared knowledge and mentorship.
  
  


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  Hands-on project work with significant client interaction and ownership.
  
  


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  Opportunity to expand technical expertise across networking, security, and cloud technologies.
  
  


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  Minimal travel requirements.
  
  


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  Manageable on-call rotation.
  
  

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  Hybrid workload consisting of client implementations and ongoing support activities.
  
  


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  Client-facing role with a steady flow of project work and occasional high-priority escalations.
  
  


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  Collaborative engineering team that encourages knowledge sharing and professional development.
  
  


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  Hands-on manager who provides support while empowering engineers to own projects and client relationships.
  
  

LaSalle Network is an Equal Opportunity Employer m/f/d/v.

LaSalle Network is the leading provider of direct hire and temporary staffing services. For over two decades, LaSalle has helped organizations hire faster and connect top talent with opportunities, from entry-level positions to the C-suite. With units specializing in Accounting and Finance, Administrative, Engineering, Marketing, Technology, Supply Chain, Revenue Cycle, Call Center, Human Resources and Executive Search. LaSalle offers staffing and recruiting solutions to companies of all sizes and across all industries.

LaSalle Network is the premier staffing and recruiting firm, earning over 100 culture, revenue and industry-based awards from major publications and having its company experts regularly contribute insights on retention strategies, hiring trends and hiring challenges, and more to national news outlets. LaSalle Network offers temporary Field Employees benefit plans including medical, dental and vision coverage. Family Medical Leave, Worker's compensation, Paid Leave and Sick Leave are also provided.

View a full list of our benefits here:

All assignments are at-will and their duration is subject to change.