SimSpace serves as an AI Proving Ground where organizations can confidently train test and outmaneuver adversaries in any environment. Trusted by allied governments militaries enterprises and research institutions worldwide SimSpace enables adaptive AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory the platform unifies training testing and validation in a realistic live-fire simulationhelping teams evaluate security investments optimize performance and compress cyber readiness cycles from months to days.

Why join SimSpace We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members external clients and their customers.

How Do We Work We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning curiosity and professional growth. That belief shows up in action: in-house training internal and external learning platforms cyber conferences industry events and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year SimSpace consistently outperforms industry benchmarks in internal mobility promotions and total rewards growth.

Who Thrives Here We are a team of innovators protectors and problem-solvers. We believe diversity of thought and experience fuels better solutions and were committed to building teams that reflect the communities we serve. Whether youre remote or office-based youll collaborate with talented colleagues across departments and time zones united by the mission to create a safer digital world.

We invite you to apply today!

Senior Network Engineer

Summary of the Role

The Senior Network Engineer position is a senior technology practitioner responsible for the collaborative design implementation monitoring maintenance and security of enterprise network infrastructure across SimSpace corporate offices and data centers across the United States and Europe.

This individual will serve as a senior technical resource and subject matter expert for both core network and network security infrastructure helping lead operational support architecture modernization and incident response efforts. The role combines traditional network engineering responsibilities with expanded ownership of network security operations secure access technologies firewall management web application protection and vulnerability management.

The successful candidate will possess deep technical expertise in enterprise networking and security technologies strong analytical and troubleshooting skills and the ability to lead initiatives and mentor junior engineers. Effective collaboration with infrastructure cloud security and business stakeholders is critical to success in this role.

What You Will Do (Responsibilities)

• Act as the subject matter expert for SimSpace network and network security infrastructure

• Design implement support and secure enterprise network infrastructure and software-defined networking solutions

• Configure and maintain complex VMware environments leveraging NSX-T DVS and software-defined networking technologies

• Contribute to the design and implementation of resilient secure and scalable network architectures

• Configure and troubleshoot virtual networking VLANs VRFs traffic forwarding and hybrid cloud connectivity

• Lead network modernization initiatives including technology refreshes architecture improvements and capacity planning

• Troubleshoot all levels of network connectivity issues including but not limited to network outages switch failures network performance network interface card (NIC) cabling TCP/IP configuration etc.

• Perform troubleshooting of complex network and security incidents including outages performance issues routing failures VPN issues and other network events

• Support enterprise LAN/WAN internet connectivity data center networking and cloud networking initiatives.

• Perform troubleshooting of complex network and security incidents including outages performance issues routing failures VPN issues and security events

• Manage and optimize secure web access technologies including content filtering secure web proxy SSL inspection DLP and zero-trust remote access platforms

• Administer next-generation firewall infrastructure including firewall policies ACLs NAT IPS/IDS VPNs routing segmentation and high-availability configurations

• Manage web application firewall (WAF) and edge security technologies including rulesets custom protections bot mitigation and application-layer threat prevention

• Support centralized logging security monitoring alerting and threat analysis activities across network and security platforms

• Assess existing network and security technologies to identify opportunities for modernization improved security posture and operational efficiency

• Maintain documentation standards and operational procedures for network and security infrastructure

• Provide technical leadership mentorship and guidance to junior engineers and operational staff

• Participate in maintenance activities infrastructure upgrades and business-driven technology projects

What You Will Bring (Requirements and Bonus Skills)

• 8 years of network engineering experience

• 5 years of hands-on network security or security infrastructure experience

• Strong understanding of enterprise networking concepts protocols and infrastructure design

• Deep knowledge of routing switching TCP/IP DNS BGP OSPF VLANs VRFs VPNs and network segmentation

• Experience designing and supporting enterprise LAN WAN and data center network architectures

• Experience managing next-generation firewalls secure web gateways web-application firewalls and zero-trust security platforms

• Strong hands-on experience with firewall policy management NAT IPS/IDS VPN technologies and routing protocols

• Strong understanding of web certificates PKI TLS/SSL encryption certificate lifecycle management and troubleshooting certificate-related connectivity or inspection issues

• Experience with LAN/WAN design including IP allocations segmentation VLAN implementation and hybrid cloud networking

• Proficiency with packet captures traffic analysis and network troubleshooting methodologies

• Familiarity with vulnerability management and security assessment tools

• Experience with monitoring and observability platforms

• Ability to lead technical implementations infrastructure upgrades and operational initiatives

• Ability to quickly learn and adapt to new technologies and platforms

• Strong written and verbal communication skills

Preferred Qualifications

• CCNP Enterprise CCIE Enterprise Infrastructure or equivalent networking certifications

• Experience with network automation frameworks and scripting technologies

• Experience supporting large-scale enterprise or data center environments

• Experience supporting compliance frameworks such as SOC 2 ISO 27001 or CMMC

• Understanding of AI and automation technologies that improve network operations monitoring troubleshooting and operational efficiency

Were proud to offer a competitive and comprehensive package designed to support your well-being growth and success:

• Compensation. Base salary range: $135000 - $205000 reflecting our confidence in your expertise and impact with the opportunity for bonuses tied to company performance and individual contributions.

• Health & Wellness. Comprehensive medical dental and vision benefits plus savings planscoverage starts on day one!

• Mental Health Support. Access to company-paid counseling coaching and resources for you and your family through Spring Health.

• Financial Well-Being. Plan for your future with a 401(k)-retirement savings plan featuring a company match.

• Flexible Time Off. Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members.

• Parental Leave. Paid leave plans to support you and your loved ones during lifes most important moments.

• Ownership Opportunities. Equity stock options at hire with annual performance-based grantsbecome an invested stakeholder in our shared success.

• Referral Rewards. Earn $1500$3500 for every qualified hire through our employee referral program.

• Peloton Interactive Wellness Program. Full- and partial- subsidized membership plans and equipment discounts to help you reach your personalized fitness goals.

• Continuous Learning. Access a LinkedIn Learning membership to prioritize your personal and professional development.

• Social Connections. Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.

• Extra Perks. Legal plan coverage pet insurance wellness reimbursements and more to simplify lifes details.

Join SimSpace and enjoy benefits that enhance your career health and happiness!

SimSpace is an Equal Opportunity Employer:

In compliance with federal law all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.

SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race color religion sex sexual orientation gender identity national origin age pregnancy genetic information disability status as a protected veteran or any other protected category under applicable federal state and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff clients volunteers subcontractors vendors and clients.

Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application!

We also consider qualified applicants regardless of criminal histories in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability please contact .

SimSpace does not accept unsolicited resumes from employment agencies.

Actual compensation for the position is based on a variety of factors including but not limited to affordability skills qualifications and experience and may vary from the range.

Required Experience:

Senior IC