22 firewall engineer jobs at 16 companies in O'Fallon, IL

2mo
Save
Mark Applied
Hide
Lead Firewall Engineer
Arnold, Missouri, United States
$90k-$190k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
8+ YOEActive TS/SCI clearance; 8+ years network security; 5+ years large-scale enterprise networks; DoD architecture familiarity; firewall/boundary team leadership; experience with F5, Palo Alto, Juniper SRX; DoD PKI/AD; TLS issues; willingness to work weekends.
F5, Palo Alto, Juniper SRX, OCSP, Active Directory, SAML, OAuth, TLS/SSL, DoD PKI, Kerberos, LDAP, STIG, SRG
2mo
Save
Mark Applied
Hide
Power Systems Automation Engineer
Lakewood or Fairview Heights or Boerne
$84k-$144k/yr OnsiteFull Time
Schweitzer Engineering Laboratories
Schweitzer Engineering Laboratories: Manufactures digital systems that protect and automate power grids.
3+ YOEBachelor's in Electrical Engineering or Computer Science; 3+ years in power systems automation and communication; experience with utility/industrial power systems, SCADA and protocols.
SCADA, DNP3, Modbus, IEC 61850, Ethernet/IP, OPC UA, RTUs, RTACs, IEDs, SEL Relays, PLC, HMI, Serial Communications, Ethernet, Firewalls, Security Gateways, Terminal Servers, Cellular Routers, Managed Switches, SDN, IEC 61131-3, Structured Text, Wireshark
2w
Save
Mark Applied
Hide
Network Engineer
Belleville, Illinois, United States
OnsiteFull Time
Abacus Technology
Abacus Technology: Provides professional IT and engineering services to government agencies.
5+ YOE5+ years network engineering experience, Bachelor’s degree, CCNP, Top Secret clearance, experience with routers/switches/firewalls, server administration, SNMP/VoIP, and full engineering lifecycle.
SNMP, VoIP, Time Compliance Technical Orders (TCTO)
2mo
Save
Mark Applied
Hide
Sales Engineer
St. Louis, Missouri, United States
$90k-$110k/yr HybridFull Time
Segra
Segra: Provider of fiber-based connectivity and managed technology solutions for businesses.
3+ YOE3-5 years in telecom or technical field; strong presentation and communication skills; knowledge of network transport, WAN, MPLS, SD-WAN, Cloud, Firewall, UCaaS, SIP Trunking, PRI, Wi-Fi; industry certifications in Route/Switch, Cybersecurity, or Data Center/Cloud
WAN, MPLS, SD-WAN, Cloud, Firewall, UCaaS, SIP Trunking, PRI, Wi-Fi
2w
Save
Mark Applied
Hide
Implementations Network Engineer II
Scott Air Force Base, Illinois, United States
OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Designs and manufactures advanced defense and aerospace systems.
2+ YOEU.S. citizen with ability to obtain Top Secret clearance, active Secret preferred; BS degree with 2+ years network experience; DoD-8570 IAT Level 2 (Security+ CE); proficiency with Cisco/Juniper and routing protocols (BGP, ISIS).
Cisco, Juniper, BGP, ISIS, OSPF, DHCP, DNS, TCP/IP, WAN, VPN, VLAN, VRF, routers, load balancers, firewalls, SharePoint, DISA Storefront (DSF)
2w
Save
Mark Applied
Hide
Network Engineer
Belleville, Illinois, United States
OnsiteFull Time
Abacus Technology
Abacus Technology: Provides IT and engineering services for government and defense.
5+ YOE5+ years network engineering experience, CCNP certification, bachelor's degree in a related field, Top Secret clearance, strong router/switch/firewall and security experience, server/VoIP and SNMP familiarity.
SNMP, VoIP, IDS
1w
Save
Mark Applied
Hide
Network Engineer (TS/SCI)
St. Louis, Missouri, United States
OnsiteFull Time
Vibrint
Vibrint: Provides mission-critical systems and data analysis for national security.
TS/SCI with CI poly required; design, implement, and maintain networks; install/configure routers, switches, firewalls, VPN gateways, DNS/DHCP; monitor performance and security; troubleshoot outages; integrate with cloud and virtualized environments.
routers, switches, firewalls, VPN gateways, DNS, DHCP, cloud, virtualized environments
1mo
Save
Mark Applied
Hide
Network Engineer
Clayton or St. Louis
OnsiteFull Time
Caleres
CaleresNYSE: CAL: Designs and retails a global portfolio of footwear brands.
3+ YOE3-5 years network engineering experience; Bachelor’s in CS/IT (required); knowledge of TCP/IP, OSPF, BGP, VLANs, MPLS, VPNs, SDWAN; experience with firewalls/IDS/IPS and monitoring tools; CCIE/CCNP preferred.
TCP/IP, OSPF, BGP, VLANs, MPLS, VPNs, SDWAN, SNMP, NetFlow, Wireshark, SolarWinds, Cisco, Aruba, Silver Peak, Palo Alto
2w
Save
Mark Applied
Hide
Senior Network Engineer
Scott Air Force Base, Illinois, United States
OnsiteFull Time
GCyber
GCyber: Provides specialized cybersecurity and IT modernization for government agencies.
8+ YOEActive DoD Top Secret clearance, CCNP and DoD 8140/8570 IAT Level II, BA/BS, 8+ years network engineering experience, expertise in routing/switching/firewall/VPN/IPv4/IPv6, DISA STIGs, and scripting for automation.
Python, GitLab CI, EVE-NG, SolarWinds, Splunk
3w
Save
Mark Applied
Hide
Senior Network Engineer Consultant
St. Louis, Missouri, United States
HybridContract
Chameleon Integrated Services
Chameleon Integrated Services: Provides IT systems integration and cybersecurity for federal agencies.
8+ YOE8+ years enterprise network engineering experience with strong routing, switching, WAN, wireless, firewall, and VPN expertise; experience documenting environments, creating diagrams, assessing security risks, and producing roadmaps; strong communication skills.
Cisco, Aruba, Fortinet, Palo Alto, Juniper, Meraki
1mo
Save
Mark Applied
Hide
Network Engineer
Clayton, Missouri, United States
OnsiteFull Time
Caleres
CaleresNYSE: CAL: Designs and retails a global portfolio of footwear brands.
3+ YOEBachelor's in CS/IT or related; 3+ years network engineering experience; deep knowledge of TCP/IP, OSPF, BGP, VLANs, MPLS, VPNs, SDWAN; network security and monitoring (firewalls, IDS/IPS, SNMP, NetFlow, Wireshark, SolarWinds); vendor experience with Cisco, Aruba, Silver Peak, Palo Alto; CCIE/CCNP preferred.
TCP/IP, OSPF, BGP, VLANs, MPLS, VPNs, SDWAN, SNMP, NetFlow, Wireshark, SolarWinds, Cisco, Aruba, Silver Peak, Palo Alto
1mo
Save
Mark Applied
Hide
Network Engineer - Contract
St. Louis or Edwardsville
$44-$54/hr OnsiteFull Time, Contract
World Wide Technology
World Wide Technology: Global technology solutions provider and systems integrator.
5+ YOE5+ years network administration experience, bachelor's degree or equivalent, CCNA required (CCNP preferred), hands-on Cisco firewall experience, familiarity with zero trust, IDS/IPS, routing protocols, and network automation (Python/Ansible).
Cisco, BGP, EIGRP, VPC, LACP, STP, Python, Ansible, ASA, Firepower, IDS/IPS, DMVPN, IPSec, ZTNA
1mo
Save
Mark Applied
Hide
Systems Engineer SME (Cloud)
O'Fallon, Illinois, United States
OnsiteFull Time
Second-61
Second-61: Provides managed technology, cybersecurity, and accounting services to businesses.
10+ YOE10+ years experience designing and deploying secure, scalable commercial cloud solutions for DoD environments; proficiency with RHEL, AWS networking, BGP, Palo Alto firewalls, DevSecOps tools (Git, Jenkins, Groovy, YAML); active DoD Secret clearance and US citizenship required.
Red Hat Enterprise Linux, Palo Alto, F5, F5 Big-IP, Panorama, Big IQ, Git, Jenkins, Groovy, YAML, AWS, WAF, GuardDuty, IAM, Security Groups, EC2, S3, Systems Manager, CloudFormation, CloudTrail, Lambda, AWS Workspaces, Route 53, Transit Gateway, VPCs, VPNs, BGP, Juniper, Cisco
1w
Save
Mark Applied
Hide
Network Security Engineer
Fort Meade or Pensacola or Mechanicsburg or Oklahoma City or San Antonio or Ford Island or Scott AFB or Hill AFB
$99k-$225k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
5+ YOE5+ years network security experience, 3+ years firewall and enterprise security design, Palo Alto/Cisco/Juniper and Wireshark experience, Secret clearance, HS diploma or GED, ability to obtain DoD 8570 IAT Level II within 3 months.
Palo Alto, Cisco, Juniper, Wireshark, SIEM, Ansible, Python, SD-WAN, AWS, Azure, GCP
1mo
Save
Mark Applied
Hide
Lead Systems Engineer - Data Integration
St. Louis or Brentwood or Richmond Heights or Clayton or Maplewood or United States
RemoteFull Time
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
5+ YOEBachelor's in CS/CIS/MIS, 5+ years scripting experience (Python, Perl, BASH, KSH, JavaScript), JSON expertise, networking/firewall and Unix/Linux/Windows knowledge, full lifecycle development, on-call availability, U.S. work authorization and CST availability.
Python, Perl, BASH, KSH, JavaScript, JSON, Unix, Linux, Windows, Oracle, Microsoft SQL, MariaDB, PostgreSQL, Amazon, Azure
1mo
Save
Mark Applied
Hide
Security Engineer II - CSIR
Saint Louis, Missouri, United States
OnsiteFull Time
Stifel Financial
Stifel FinancialNYSE: SF: Financial services firm providing wealth management and investment banking.
2+ YOEBachelor's in CS/IS/cybersecurity or equivalent experience, 2+ years in IT/security, incident identification and response, troubleshooting, familiarity with security tooling and SIEM/UEBA, strong communication and multitasking.
Microsoft 365, Microsoft Excel, Microsoft Outlook, SIEM/UEBA, firewalls, intrusion detection systems, endpoint detect response, anti-virus, anti-malware, authentication systems, ticketing systems, monitoring tools
1mo
Save
Mark Applied
Hide
Security Engineer II - CSIR
Saint Louis, Missouri, United States
OnsiteFull Time
Stifel
StifelNYSE: SF: Global wealth management and investment banking firm.
2+ YOEBachelor's degree or equivalent experience, 2+ years IT/infosec experience, proficiency with Microsoft 365, SIEM/UEBA and endpoint/security systems, strong troubleshooting, incident response, and communication skills.
Microsoft 365, Microsoft Excel, Microsoft Outlook, SIEM/UEBA, ticketing systems, endpoint detect response, firewalls, intrusion detection systems, anti-virus, anti-malware, authentication systems, content filtering, monitoring tools, logging
1mo
Save
Mark Applied
Hide
Service Desk Engineer
Maryland Heights, Missouri, United States
OnsiteFull Time
GFI Digital
GFI Digital: Provides managed IT, print, and office equipment solutions.
3+ YOE3+ years hands-on IT support (3 years MSP) with Windows workstation/server and networking experience; strong customer service, documentation, prioritization, and problem-solving skills; vendor certifications preferred.
Windows Server, Microsoft Office Suite, switches, firewalls, wireless access points
1w
Save
Mark Applied
Hide
Security Engineer IV - API/Cloud Security
Tempe or St. Louis
HybridFull Time
Edward Jones
Edward Jones: Offers investment management and financial planning through local branches.
5+ YOE5+ years in cybersecurity or application/API security; hands-on experience with API, cloud, and vulnerability tools; scripting (shell, Perl, Python) and Azure familiarity; bachelor\u0002s preferred.
Linux, UNIX, Proofpoint, Windows, LDAP, DBMS, Firewall, IDS/IPS, DLP, API Security, DNS, Vulnerability Assessment Tools, Azure, shell, Perl, Visual Basic, PHP, Python, containerization, CSPM, SSPM, AI Security