Network Architecture
Enterprise routing and switching, WAN/LAN/WLAN, BGP, OSPF, VLANs, QoS, 802.1X, IPv4/IPv6, DNS
Senior Network Engineer · Infrastructure & Security
Infrastructure.
Security.
Operations.
Designing and operating enterprise networks across healthcare, utilities, and multi-site environments, with a focus on network architecture, infrastructure, and security. EMS, teaching, independent ventures, and cybersecurity collaboration add breadth beyond the day job.
jh@network:~$
JHJeffrey Hathaway
Infrastructure & Security
Business Operations
PROFILEONLINE
CORENETWORK ENGINEERING
FOCUSRELIABILITY + SECURITY
MODEBUILD · OPERATE · IMPROVE
Network engineering
Enterprise network engineering across architecture, security, and operations.
Jeffrey’s current work centers on enterprise routing and switching, WAN/LAN/WLAN, firewalls, network access control, virtualization, monitoring, and the operational practices that keep infrastructure understandable and maintainable.
Design for failureMake complexity observableSecure the edgesDocument the decisions
Explore Network Engineering →
Technical range
Current technical focus.
Enterprise networking, infrastructure, and network security are the center of Jeffrey’s current work.
Network Security
Firewalls, VPN, network access control, Zero Trust, MFA, segmentation, security controls and standards
Systems & Virtualization
VMware vSphere, Proxmox, LXC, Windows Server, Linux, Active Directory, Microsoft 365
Operations & Resilience
Monitoring, performance analysis, alerting, troubleshooting, high availability, disaster recovery, operational visibility
Platforms
Cisco, Fortinet, Meraki, VMware, Microsoft, Proxmox
Technical Strategy
Architecture decisions tied to business requirements, risk, and maintainability
Current platforms
CiscoFortinetMerakiVMwareMicrosoftProxmox
Selected problem patterns
Selected infrastructure problem patterns.
Selected infrastructure patterns and project notes that show the type of engineering problems Jeffrey works through without exposing organization-sensitive details.
01
Multi-site infrastructure
Stabilize the network before scaling it.
Untangle brittle dependencies, document the real topology, remove single points of failure, and create a network that can grow without becoming fragile.
Outcome: simpler operations · clearer failure domains · better resilience
02
Security modernization
Strengthen the edge without making the business miserable.
Modernize firewall policy, remote access, segmentation, identity boundaries, and monitoring while keeping day-to-day workflows usable.
Outcome: tighter control · better visibility · fewer operational surprises
03
Operational visibility
Turn “the network feels slow” into something measurable.
Build monitoring, baselines, logs, diagrams, and escalation paths that turn vague symptoms into diagnosable systems.
Outcome: faster troubleshooting · stronger documentation · less guesswork
Current ventures
Built around real-world problems.
Jeffrey’s independent ventures sit alongside his primary enterprise engineering career, applying the same practical systems thinking to technology, payments, and specialty retail.
The Server Doctor
Independent technology projects
A long-running independent technology venture focused on selected infrastructure, security, systems, and advisory projects.
Visit the businessMansfield Payments
Payments & merchant services
Straightforward payment processing and POS solutions for small businesses, with an emphasis on clear pricing and accessible local support.
Visit the businessSignal Firearms
Local specialty retail
A locally focused venture built around transparent service, practical availability, and a straightforward customer experience.
Visit the business2007The Server Doctor founded
3Active ventures
N1NEAmateur radio
VTCommunity rooted
2007The Server Doctor began
Experience that crosses disciplines
Engineering is the core. The perspective is broader.
Jeffrey’s career is centered on enterprise network engineering, infrastructure, and network security. Independent ventures, EMS work, teaching, and community cybersecurity involvement add breadth outside that primary focus.
His work emphasizes clear architecture, useful documentation, measurable performance, and maintainable operations.
Network ArchitectureRouting & SwitchingNetwork SecurityInfrastructureVirtualizationOperations
Read Jeffrey’s StoryBeyond enterprise engineering
Technical experience beyond the day job.
Outside enterprise engineering, Jeffrey contributes through healthcare cybersecurity collaboration, emergency medical services, and amateur radio.
Cybersecurity collaboration
Healthcare Cybersecurity Working Group
Participates in Vermont’s Healthcare Cybersecurity Working Group, part of the Cybersecurity Advisory Council, contributing a network and infrastructure perspective to cross-sector cybersecurity discussions.
Vermont Cybersecurity Advisory Council →Emergency medical services
AEMT & First Response
On-call and volunteer EMS service across Vermont, including current AEMT roles and more than a decade of first-response experience.
View EMS experience →Amateur radio
N1NE
FCC Amateur Radio Extra Class license holder, callsign N1NE, with a longstanding interest in communications and radio systems.
Professional recommendations
What colleagues say about Jeffrey.
Recommendation highlights from people who have worked with Jeffrey across infrastructure, technology, and operations.
“
Creative network engineering, strong security instincts, and a business-minded approach to hardening complex infrastructure.
Bob StetzelChief Administrative Officer, Howard Center“
A go-to problem solver with broad technical knowledge, strong research instincts, and practical answers when difficult challenges show up.
Lance McPeckInformation Technology & Services Professional“
Experienced, dedicated, level-headed, and thoughtful when evaluating solutions, with deep experience brought to every situation.
Sue FritzDirector of Technology, VITL“
A capable Windows systems administrator and dependable collaborator with a reputation for getting projects across the finish line.
Yves LacombePrincipal Engineer, Vircom Inc.Explore the full technical and operational picture.
Dive into Jeffrey’s engineering career, credentials, project notes, EMS experience, independent ventures, and community cybersecurity work.