Senior Sales Engineer (Pre-Sales)

About the Role

Senior Sales Engineer is a pre-sales, customer-facing, quota-adjacent role on the Sales team. You'll spend your days in discovery calls, demos, POVs, and deal strategy — not in a NOC nor writing production code. You will also participate in post-sales technical escalation support and collaborate with customer success and customer onboarding requests. This is not a software or network architect role. Pre-sales Engineering experience is required.

About ZeroTier

ZeroTier leads the world in next-generation connectivity and cybersecurity. Our platform provides highly secure, peer-to-peer virtual networks relied upon by millions of users and businesses—from individual users and startups to mid-scale enterprises and Fortune 500 companies. We’re backed by investors including Battery Ventures, Bonfire Ventures, and Anorak Ventures.

Responsibilities

• Own the technical win across the deal cycle: discovery and qualification with Account Executives, demo, POV design and execution, technical close.
• Run structured POVs with clear success criteria, mutual action plans, timelines, and exit decisions—for deployments from ten nodes to tens of thousands.
• Deliver demos and whiteboard sessions that resonate with audiences from hands-on network engineers to CISOs and procurement executives.
• Win competitive deals by articulating where ZeroTier beats Tailscale, WireGuard-based stacks, and legacy VPN/SD-WAN vendors, and being honest about where it doesn't.
• Answer RFPs, RFIs, and security questionnaires, translating FIPS, CNSA 2.0, and post-quantum readiness requirements into concrete architecture answers.
• Architect across ZeroTier’s full surface area: hosted Central, self-hosted controllers, flow rules, bridging, multipath, SSO/OIDC, and ZeroTier Quantum's SaaS, sovereign, and air-gapped modes.
• Bridge to Engineering when deals need it—reproduce issues, capture evidence, escalate defects and feature gaps.
• Build the SE machine: demo environments, reference architectures, battle cards, and POV runbooks that make the entire go-to-market team faster.
• Feed the field's voice into the product: structured win/loss insights, deployment patterns, and roadmap input.

Requirements

• 4+ years of customer-facing experience in a pre-sales role—Sales Engineer, Solutions Engineer, or Solutions Architect attached to a sales team and a quota.
• Proven track record of deals you helped win, with clear explanations of your role in winning them.
• Elite discovery skills: ability to ask the second and third question, uncover the real problem, and disqualify gracefully when there isn't a fit.
• Executive presence and range—equally credible whiteboarding Layer 2 internals with a network architect and presenting risk and ROI to a board-level audience.
• POV/pilot management as a discipline: success criteria, mutual action plans, crisp status communication, and on-time execution in parallel.
• Excellent written communication—architecture docs, follow-up summaries, and RFP responses that are clear, polished, and technically precise.
• A builder's mindset for a 30+-person company: low ego, high ownership, comfortable with ambiguity.

Skills

• Technical Fundamentals: Strong networking fundamentals: Layer 2 vs. Layer 3 behavior, routing, NAT and NAT traversal, firewalls, DNS, and overlay/underlay separation.
• Packet-Level Comfort: Wireshark/tcpdump as a working tool, not a party trick.
• Cloud & Linux Experience: Solid Linux and real cloud experience (AWS/Azure/GCP): VPCs, routing, security groups, hybrid connectivity.
• Hands-on Familiarity: At least two of: SD-WAN, ZTNA, VPN technologies (WireGuard, IPsec, OpenVPN), container networking, or embedded/IoT connectivity.
• Identity & Access: Working knowledge of SSO/identity (OIDC, SAML, Entra ID/Okta) as it intersects with network access.
• Scripting: Fluency in Python or Bash—enough to automate a demo environment and exercise a REST API.
• Communication: Ability to translate technical details into plain-language business value for non-cryptographer audiences.

Nice to Have

• Selling into defense, government, or regulated sectors (DOD, GovCloud, sovereign infrastructure).
• Background in OT/industrial environments (Modbus, IEC-61850, SCADA).
• Prior work at an overlay networking, mesh VPN, ZTNA, or SD-WAN vendor.
• Experience as a first or early SE hire—building the function, not just running plays.
• Working grasp of modern cryptography and the quantum threat model—why "harvest now, decrypt later" makes PQC a today problem—and familiarity with NIST PQC standards (FIPS 203/204/205), hybrid schemes, and the CNSA 2.0 compliance landscape.
• Familiarity with NIST post-quantum standards (FIPS 203 / ML-KEM, FIPS 204 / ML-DSA, FIPS 205 / SLH-DSA), hybrid classical + PQC schemes, and crypto-agility as an architectural principle.
• Awareness of the compliance landscape driving adoption: CNSA 2.0 timelines, FIPS 140-3 validation, and PQC mandates emerging across government and regulated industries.

How We Work

You'll report to the Director of Pre-Sales Engineering & Customer Success and partner daily with Sales, Engineering, and Customer Success. Remote-first with occasional travel for key customer engagements, POV kickoffs, and industry events. We move quickly, write things down, and hold a high bar for what we put in front of customers.

Benefits

• Competitive salary + variable compensation tied to team success and available equity.
• Hybrid office / remote work environment.
• Generous employer-paid health insurance, including preventative dental.
• 401K with employer matching.
• Flexible PTO and flexible work hours.
• Career enhancement funds.

More About ZeroTier

Founded in 2013 by Adam Ierymenko, ZeroTier’s mission is to make peer-to-peer networking with strong encryption so simple, secure, and intuitive that it becomes the default for the internet. Our network virtualization platform offers enterprise-grade software-defined networking for every device, service, and application, whether at the edge or in the cloud. It's powerful enough for large businesses and defense applications, yet easy for individuals to use for tasks like gaming or remote access. Our team is composed of industry-leading experts dedicated to solving complex challenges in high-performance, decentralized networking.