Senior Enterprise Network Services Engineer

J ob Location Re m ote, United States T ra cking Code 13 3 3-383 P os ition Type Fu l l-Time/Regular C or e4ce is seeking a Senior 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. R es ponsibilities: D es ign, configure, install, and manage enterprise network infrastructure, including routers, switches, firewalls, and load balancers. Pla n and schedule the installation or modification of network hardware and software. Imp lement and maintain secure network configurations across multi-VRF Cisco routers and enterprise environments. Tro ubleshoot and analyze TCP/IP network traffic, including TCP 3-way handshake, TCP window scaling, and MSS. Cap ture and analyze network packets using TCPDump (Linux) and Flow Monitor Capture (Cisco ASR). Imp lement multi-protocol routing solutions with BGP, OSPF, and VRF-based networks. Use Wireshark, TCPDump, and other diagnostic tools for network performance analysis. Per form TLS/SSL handshake troubleshooting and security configuration. Con figure and maintain firewalls (Palo Alto, Cisco), including security policies, VPNs, and intrusion prevention systems (IPS). Imp lement AAA technologies (Cisco ISE, LDAP, OTP) for access management. Ens ure certificate management and encryption, including TLS/SSL and OpenSSL operations. Ins tall, configure, and troubleshoot digital certificates on F5 LTM/GTM/APM/ASM appliances. Imp lement F5 Client Constrained Delegation (C3D) for certificate delegation. Ena ble certificate-based authentication using Client-SSL profiles and APM policies. Dep loy and maintain network monitoring, alerting, and repair systems in production environments. Tro ubleshoot BGP neighbor configurations, VPNv4 unicast summary, and OSPF network participation. Opt imize and troubleshoot load balancing solutions and DNS-based traffic management. * Th s position is designed to be flexible, with responsibilities evolving to meet business needs and enable individual growth. R eq uirements: M in imum 4 years of hands-on experience as a Network Administrator or Network Security Engineer. Abi lity to obtain a Secret clearance w/Tier 5 investigation St r ong knowledge of OSI and TCP/IP network models, TCP 3-way handshake, and window scaling. Exp erience with Palo Alto and Cisco firewalls. Exp erience with F5 LTM, GTM, APM, ASM for load balancing and security. Cis co Certified Network Professional (CCNP) certification or equivalent experience or willingness to get within 45 days of hire. P re ferred: S tr ong troubleshooting skills with routing protocols (BGP, OSPF, VRF, LISP). Fam iliarity with network packet capture tools (TCPDump, Wireshark). Und erstanding of essential network services (DNS, SMTP, NTP, IMAP, SNMP). Exp erience in TLS/SSL security, OpenSSL, and certificate management. Exp erience working with Unix/Linux-based systems. Exp erience with network automation (REST APIs, Syslog, XML, SNMP). Exp erience deploying and troubleshooting load-balanced services and SSL certificate management. W hy Work for Us? Cor e4ce is a team of innovators, self-starters, and critical thinkers—driven by a shared mission to strengthen national security and advance warfighting outcomes. W e offer: 4 01 (k) with 100% company match on the first 6% deferred, with immediate vesting Co m prehensive medical, dental, and vision coverage—employee portion paid 100% by Core4ce Un l imited access to training and certifications, with no pre-set cap on eligible professional development Tu i tion assistance for job-related degrees and courses Pa i d parental leave, PTO that grows with tenure, and generous holiday schedules Go t 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. J oi n us to build a career that matters—supported by a company that invests in you. A ll 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. S al ary Range $1 0 0,000.00 - $145,000.00 S al ary Currency US D S al ary Type An n