Network Engineer - Switch Management (Active Top Secret Clearance)

Great Hill Solutions is part of the Seneca Nation Group (SNG) portfolio of companies. SNG is the federal government contracting business wholly owned by the Seneca Nation. SNG meets mission-critical needs of federal civilian, defense, and intelligence community customers across a variety of domains. The SNG portfolio receives shared services support from its parent company Seneca Holdings and is comprised of multiple companies that participate in the Small Business Administration 8(a) program. To learn more visit www.senecanationgroup.com and follow us on LinkedIn.

At Seneca, our team of talented individuals is what makes us successful. To support our team, we provide a balanced mix of benefits and programs.Your total rewards package includes competitive pay, benefits, and perks, flexible work-life balance, professional development opportunities, and performance and recognition programs. We offer a comprehensive benefits package that includes medical, dental, vision, life, and disability, voluntary benefit programs (critical illness, hospital, and accident), health savings and flexible spending accounts, and retirement 401K plan. One of our fundamental principles at Seneca Holdings is to offer competitive health and welfare benefits to our team members, providing coverage and care for you and your family. Full-time employees working at least 30 hours a week on a regular basis are eligible to participate in our benefits and paid leave programs. We pride ourselves on our collaborative work environment and culture, which embraces our mission of providing financial and non-financial benefits back to the members of the Seneca Nation.

Great Hill Solutions is seeking a highly skilled and detail-oriented Network Engineer to support the Department of State's Cloud and Virtual Services Division as part of its Hyper Converged Engineering Team. This position is critical to the successful operation and modernization of the Department's enterprise network and hybrid infrastructure, with a strong focus on data center switch management and Cisco network systems.The ideal candidate brings hands-on experience managing enterprise-class switches, a deep understanding of network design within federal data centers, and a proactive approach to optimizing performance, security, and scalability across cloud and on-premises environments.

Roles and Responsibilities include, but are not limited to:

• 
  

  Administer and maintain enterprise-level switches and networking gear in a hybrid data center/cloud environment.

  
  
• 
  

  Design, configure, and optimize Layer 2 and Layer 3 network infrastructure, including VLANs, trunks, spanning-tree, and routing protocols.

  
  
• 
  

  Implement network segmentation, QoS policies, and access control following Department of State (DoS) security standards and NIST hardening guidance.

  
  
• 
  

  Collaborate with virtualization and converged infrastructure engineers to ensure seamless integration of network, compute, and storage systems.

  
  
• 
  

  Lead the implementation and support of switching environments for both new deployments and ongoing operations and maintenance (O&M).

  
  
• 
  

  Monitor and troubleshoot switching infrastructure, ensuring network resilience, minimal latency, and high availability across mission-critical environments.

  
  
• 
  

  Participate in the integration of new network hardware and software-ensuring compatibility, compliance, and optimal performance.

  
  
• 
  

  Maintain thorough documentation of switch configurations, network topologies, and standard operating procedures.

  
  
• 
  

  Coordinate disaster recovery (DR) planning, including redundancy, failover, and backup connectivity strategies.

  
  
• 
  

  Provide Tier 3 support, technical leadership, and mentorship for junior network staff.

  
  
• 
  

  Develop and enforce network security policies and configuration baselines in accordance with Federal IT and Department of State guidelines.

  
  

Virtual Infrastructure Responsibilities:

• 
  

  Design, architect, and implement virtual infrastructure (VI) environments using VMware technologies.

  
  
• 
  

  Maintain all VMware virtual infrastructure environments, ensuring performance, availability, and system integrity.

  
  
• 
  

  Manage all physical hardware hosting the virtual infrastructure, coordinating upgrades, maintenance, and troubleshooting.

  
  
• 
  

  Monitor the availability and performance of enterprise VI systems, proactively addressing issues to ensure service continuity.

  
  
• 
  

  Maintain and provide reliable VM backups and restoration capabilities to support business continuity and disaster recovery.

  
  
• 
  

  Provide 24/7 Tier 3 support for virtual infrastructure issues on a rotating basis, including incident response and escalation.

  
  
• 
  

  Assist customers in designing and implementing enterprise-grade solutions within virtualized environments.

  
  
• 
  

  Participate in the design and architecture of overall data center network infrastructure, ensuring integration with virtualization platforms.

  
  
• 
  

  Produce comprehensive architectural documentation for logical and physical virtual infrastructure components.

  
  
• 
  

  Provision and manage customer virtual machines, providing ongoing support and lifecycle management.

  
  
• 
  

  Work with vendors to implement secure, cost-effective government solutions that align with technical and regulatory requirements.

  
  
• 
  

  Harden all virtual and physical infrastructure in accordance with Department of Defense (DoD) cybersecurity standards.

  
  
• 
  

  Collaborate with cross-functional teams to develop and deliver tailored infrastructure solutions that support evolving mission needs.

  
  
• 
  

  Work independently with minimal supervision, proactively identifying and addressing infrastructure issues and reporting findings to the team.

  
  
• 
  

  Communicate clearly and effectively with management regarding technical issues, troubleshooting steps, and proposed resolutions.

  
  
• 
  

  Develop and propose future infrastructure enhancements, contributing to long-term planning and modernization efforts.

  
  

Required Qualifications:

• Minimum of 2 years of enterprise network engineering/administration experience, with a focus onswitch management, to include but not limited to Cisco switches.
• Active Top Secret clearance (required).
• Legally authorized to work in the U.S. without the need for sponsorship.
• Cisco Certified Network Associate (CCNA) or equivalent; must demonstrate strong working knowledge of Cisco hardware and software.
• Experience with VLAN configuration, trunking, QoS, access control, and switch hardening in enterprise or federal environments.
• Strong troubleshooting skills and attention to detail in high-availability environments.

Preferred Qualifications:

• Experience supporting data center switch infrastructure within the Department of State or other federal agencies.
• Familiarity with advanced Cisco certifications (e.g., CCNP), and additional platforms like Nexus, Catalyst, or SDN technologies.
• Knowledge of Hyper Converged Infrastructure (e.g., Nutanix, VMware), virtual switching, and hybrid networking models.
• Working knowledge of network monitoring and logging tools (e.g., SolarWinds, Splunk, Wireshark).
• Comfortable in Agile and DevSecOps environments, collaborating closely across multidisciplinary engineering teams.