Enterprise Network Services Engineer

Careerwebsite; Charleston (SC); Hybrid; USD 120,000 - 170,000; Full time

Benefits offered by this job

401(k) plan with match

Comprehensive medical/dental/vision

Training and certifications

Tuition assistance

Parental leave and PTO

Internal innovation program

Job summary

Core4ce is seeking an Enterprise Network Services Engineer to design, implement, and maintain secure and scalable enterprise networks. You will work across on-prem, multi‑VRF Cisco environments, and cloud integrations with Azure, AWS, and Oracle Cloud.

The role emphasizes TCP/IP, TLS/SSL security, scripting, and network automation, with CCNP or equivalent preferred and a Secret Clearance depending on eligibility. Remote options are available in the US.

Qualifications

• Minimum 4 years hands-on experience as a Network Administrator or Security Engineer.
• Strong knowledge of OSI and TCP/IP models, TCP 3-way handshake, and window scaling.
• Experience with Palo Alto and Cisco firewalls.
• Experience with F5 LTM/GTM/APM/ASM for load balancing and security.
• CCNP certification or equivalent or willingness to obtain within 45 days of hire.
• Ability to obtain a Secret Clearance.

Responsibilities

• Design, configure, install, and manage enterprise network infrastructure including routers, switches, firewalls, and load balancers.
• Plan and schedule installation or modification of network hardware and software.
• Implement secure configurations across multi-VRF Cisco routers and enterprise environments.
• Troubleshoot TCP/IP traffic, TLS/SSL handshake, and security configurations.
• Monitor, troubleshoot, and optimize network performance and security.
• Support cloud networking across Azure, AWS, and Oracle Cloud and virtualized environments.
• Develop scripts for automation and use REST APIs, Syslog, XML, and SNMP.

Skills

TCP/IP networking

Firewall management

Network security

Routing protocols

Python scripting

Cloud networking

Unix/Linux

TLS/SSL

CCNP

Education

CCNP or equivalent

Tools

Palo Alto firewalls

Cisco firewalls

F5 LTM/GTM/APM/ASM

VPNs and IPS

Job description

Core4ce Enterprise Network Services Engineer 1432-383

Core4ce is seeking an Enterprise Network Services Engineer to design, implement, and maintain secure and scalable enterprise network infrastructures. The ideal candidate will have a strong background in network engineering, security, routing, firewall management, load balancing, and automation. This role requires deep knowledge of TCP/IP networking, encryption protocols, traffic analysis, scripting, and cloud networking. Additionally, the candidate will be responsible for planning IT security projects, troubleshooting complex network issues, and ensuring compliance with security policies.

Responsibilities:

• Design, configure, install, and manage enterprise network infrastructure, including routers, switches, firewalls, and load balancers.
• Plan and schedule the installation or modification of network hardware and software.
• Implement and maintain secure network configurations across multi-VRF Cisco routers and enterprise environments.
• Troubleshoot and analyze TCP/IP network traffic, including TCP 3-way handshake, TCP window scaling, and MSS.
• Capture and analyze network packets using TCPDump (Linux) and Flow Monitor Capture (Cisco ASR).
• Implement multi-protocol routing solutions with BGP, OSPF, and VRF-based networks.
• Use Wireshark, TCPDump, and other diagnostic tools for network performance analysis.
• Perform TLS/SSL handshake troubleshooting and security configuration.

Network Security & Compliance

• Configure and maintain firewalls (Palo Alto, Cisco), including security policies, VPNs, and intrusion prevention systems (IPS).
• Implement AAA technologies (Cisco ISE, LDAP, OTP) for access management.
• Ensure certificate management and encryption, including TLS/SSL and OpenSSL operations.
• Install, configure, and troubleshoot digital certificates on F5 LTM/GTM/APM/ASM appliances.
• Implement F5 Client Constrained Delegation (C3D) for certificate delegation.
• Enable certificate-based authentication using Client-SSL profiles and APM policies.
• Performance Monitoring & Troubleshooting
• Deploy and maintain network monitoring, alerting, and repair systems in production environments.
• Troubleshoot BGP neighbor configurations, VPNv4 unicast summary, and OSPF network participation.
• Analyze DUP ACK packets, out-of-order segments, and retransmission issues.
• Optimize and troubleshoot load balancing solutions and DNS-based traffic management.

Cloud & Virtualization Integration

• Manage and support cloud-based network services across Azure, AWS, and Oracle Cloud.
• Configure and maintain virtualized network appliances in VMware environments.

Automation & Scripting

• Utilize Python and BASH scripting for network automation and troubleshooting.
• Develop scripts using REST APIs, Syslog, XML, and SNMP for automation.
• Use regular expressions (e.g., ".*", "^", "$") for scripting and log parsing.

This position is designed to be flexible, with responsibilities evolving to meet business needs and enable individual growth.

Requirements:

• Minimum 4 years of hands‑on experience as a Network Administrator or Network Security Engineer.
• Strong knowledge of OSI and TCP/IP network models, TCP 3-way handshake, and window scaling.
• Experience with Palo Alto and Cisco firewalls.
• Experience with F5 LTM, GTM, APM, ASM for load balancing and security.
• Cisco Certified Network Professional (CCNP) certification or equivalent experience or willingness to get within 45 days of hire
• Ability to obtain a Secret Clearance (preference goes to candidates who possess an Active Secret Clearance)

Preferred Qualifications:

• Strong troubleshooting skills with routing protocols (BGP, OSPF, VRF, LISP).
• Familiarity with network packet capture tools (TCPDump, Wireshark).
• Understanding of essential network services (DNS, SMTP, NTP, IMAP, SNMP).
• Experience in TLS/SSL security, OpenSSL, and certificate management.
• Proficiency in scripting languages (Python, BASH) and automation tools.
• Experience working with Unix/Linux-based systems.
• Experience with network automation (REST APIs, Syslog, XML, SNMP).
• Experience deploying and troubleshooting load‑balanced services and SSL certificate management.
• Familiarity with multi‑cloud networking (Azure, AWS, Oracle Cloud).
• Experience working with Puppet Labs or SaltStack configuration management

Why Work for Us?

Core4ce is a team of innovators, self‑starters, and critical thinkers—driven by a shared mission to strengthen national security and advance warfighting outcomes.

We offer:

• 401(k) with 100% company match on the first 6% deferred, with immediate vesting
• Comprehensive medical, dental, and vision coverage—employee portion paid 100% by Core4ce
• Unlimited access to training and certifications, with no pre‑set cap on eligible professional development
• Tuition assistance for job‑related degrees and courses
• Paid parental leave, PTO that grows with tenure, and generous holiday schedules
• Got a big idea? At Core4ce, The Forge gives every employee the chance to propose bold innovations and help bring them to life with internal backing.

Join us to build a career that matters—supported by a company that invests in you.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy), national origin, disability, veteran status, age, genetic information, or other legally protected status.

*Core4ce provides the listed pay range for this position as a general guideline only and not as a guarantee of compensation or salary. Final offers may take into account a variety of factors, including, but not limited to, job responsibilities, education, experience, knowledge, skills, abilities, internal equity, market data alignment, any applicable collective bargaining agreement, and other legal requirements.

Remote, United States

Full-Time/Regular

All qualified applicants will receive consideration for employment without regard to race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, age, marital status, pregnancy, genetic information or other legally protected status.

PI287217247