Core4ce 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. 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. *This position is designed to be flexible, with responsibilities evolving to meet business needs and enable individual growth. 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. Requirements - Minimum 4 years of hands-on experience as a Network Administrator or Network Security Engineer. - Secret clearance w/Tier 5 investigation - 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 Preferred - 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.

Role Description Leidos Health and Services Sector currently has an opening for a Provider Relations Specialist to work remotely. This is an exciting opportunity to use your experience helping the Military OneSource mission. The Military OneSource Program provides 24/7 support services for military members and their families, similar to a commercial Employee Assistance Program (EAP). This program provides a broad array of information, resources, education, referrals, and counseling to about 4.7 million participants which includes military service members, their families, and eligible civilians at locations worldwide. The Provider Relations Specialist serves as a central point of contact for a large network of behavioral health counselors, providing real-time administrative and operational support to ensure consistent, compliant, and high-quality service delivery. This role is responsible for assisting counselors with administrative, procedural, and documentation-related inquiries, enabling them to effectively complete assigned tasks, maintain accurate records, and meet program requirements. The position plays a critical role in enhancing provider experience, reducing administrative burden, and ensuring alignment with program standards and timelines. Job Responsibilities - Serve as the primary support resource for counselors across the provider network, responding to inquiries related to workflows, documentation, and program processes. - Provide guidance on completing required paperwork, including case documentation, encounter notes, and administrative forms in accordance with program standards. - Assist counselors with submission processes, including After Action Reports (AARs), service documentation, and other required deliverables. - Support providers in understanding procedures and processes to ensure timely and accurate report submissions. - Monitor common inquiries and trends to identify gaps in information; recommend improvements. - Collaborate with clinical leadership, operations, and administrative teams to ensure consistent communication and guidance to the provider network. - Maintain up-to-date knowledge of program policies, compliance requirements, and operational procedures. - Develop and maintain reference materials, FAQs, and job aids to support counselors in navigating program requirements. - Ensure timely, professional, and customer-focused communication with all providers. Qualifications - Associates degree in Behavioral Health, Social Work, Psychology, Healthcare Administration, or a related field (or equivalent experience). - 2+ years of experience providing admin support to behavioral health programs, provider networks, or healthcare personnel. - Familiarity with professional health documentation, case management processes, and standards in behavioral health settings. - Experience working with provider support, non-technical help desk functions, or customer service in a healthcare environment. - Strong problem-solving skills with the ability to troubleshoot and resolve issues efficiently. - Excellent verbal and written communication skills, with the ability to explain processes clearly to diverse audiences. - High attention to detail and ability to manage multiple inquiries in a fast-paced environment. - Proficiency within provider portals, and standard office software. - Ability to work collaboratively across multidisciplinary teams while maintaining a high level of professionalism and responsiveness. - U.S. citizenship and fluency in English required. - Ability to successfully pass criminal history, fingerprint background checks, and credential verification required. - Ability to maintain and retain suitability investigation and clearance as required. - Proficient in navigating electronic systems, computer programs, and virtual service platforms. - This position requires a separate, quiet, private, confidential space to work from, as well as having access to your own reliable high-speed internet hard wired to your home (coax or fiber from the Internet Service Provider (ISP) to your home). Using a hot spot from a mobile device (tethering) or wireless ISP is not acceptable. Benefits - If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. - We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. - Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares. Original Posting April 17, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Pay Range Pay Range $41,600.00 - $75,200.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

• Design, implement, and maintain scalable, secure network infrastructure across data centers, remote sites, and cloud environments (AWS and Azure). • Architect and operate routing and switching infrastructure including BGP, NAT, VLANs, Spanning Tree, IPsec VPNs, PBR, and HSRP. • Manage and tune enterprise firewall platforms (Cisco, pfSense, Check Point) in alignment with PCI DSS segmentation and access control requirements. • Administer and optimize F5 BIG-IP LTM/GTM for application delivery, load balancing, and traffic steering across production environments. • Manage Cloudflare DNS, WAF, and network security policies for internet-facing properties. • Maintain network security policy management via FireMon; contribute to access path analysis and rule lifecycle management. • Evaluate, deploy, and operationalize free open-source software (FOSS) as replacements for commercial products where appropriate (e.g., network monitoring, IPAM, configuration backup). • Manage Proxmox-based virtualization as it relates to network-adjacent workloads and VM/LXC networking. • Coordinate with vendors and carriers to manage WAN circuits, resolve outages, and drive cost optimization. • Maintain comprehensive documentation for network topology, configurations, and operational runbooks; support PCI DSS and SOC 1 Type 2 audit evidence collection. • Participate in on-call rotation and be available for after-hours work including unscheduled incidents. • Travel to domestic data center and office locations as needed to support deployments or incidents.

• Provide day-to-day support to various clients on multiple scenarios such as: - Transport and Routing support when deploying products on Client Environment. • Support on WAN technologies such as SD-WAN and IPsec VPN and routing technologies such as BGP, OSPF, MPLS etc. • Provide support on Cloud based Deployments like VNF (Virtual Network Functions) and CNF (container Networking Functions) • Handson on Packaging solutions supporting OSP(Open Stack Platform - Heat/Hot Templates) and other cloud based platforms. • The role demands excellent knowledge of TCP/IP, BGP, OSPF, VxLAN protocols, and L2/L3 VPNs. • Candidate requires good understanding of 4G LTE/5G Core, Mobile Private Networks. • Candidates should be adept with network diagnostic, monitoring, and analysis tools. • Demonstrate the ability to work collaboratively within a team and manage multiple projects concurrently. • Strong problem-solving skills are essential to address and resolve current deployment, package and security issues and mitigate future risks effectively. • Capable of managing and coordinating project workflows, resolving any vulnerabilities or security issues that arise, and handling troubleshooting calls efficiently.