Job description

Alderson Loop is seeking a Security Network Engineer to join its Global Cyber Defense team, focusing on the perimeter defense layer of the firm’s infrastructure. In this position, you will manage, engineer, and support mission-critical security technologies across email gateways, web proxies, and firewalls. This role is heavily operations-focused, with strong collaboration required across infrastructure, incident response, and threat intelligence teams. The role requires the Engineer to be on-site 2 days a week in Owings Mills, MD. Salary range from $85,000 - $105,000 Key Responsibilities • Operate, configure, and engineer perimeter defense systems: • Email Security Gateways (e.g., Proofpoint) • Web Proxies • Next-Generation Firewalls (e.g., Palo Alto) • Review, triage, and respond to operational issues and support tickets • Write and maintain email and firewall rules (e.g., allowlisting, port access, blocklists) • Provide consultative support to project teams around firewall and proxy configurations • Evaluate and implement change requests while identifying network/security risks • Use SIEM tools (e.g., Splunk) to analyze logs, troubleshoot issues, and support investigations • Collaborate with internal engineering and infrastructure teams, as well as external vendors • Participate in meetings with various technical and business stakeholders • Participate in a rotational on-call schedule (approximately every 5 weeks) Required Skills & Experience • 5–10 years of experience in IT infrastructure, with at least 4 years focused on network or perimeter security • Hands-on experience with firewalls, email security gateways, and proxies • Strong technical understanding of: • IPv4, TCP/IP, low-level networking, TCP/UDP ports • Core infrastructure (networking, OS, identity & access) • Demonstrated ability to work independently and prioritize tasks effectively • Experience supporting operations across multi-team environments • Familiarity with SIEMs like Splunk for operations and troubleshooting • Strong communication skills and comfort interacting with both technical and non-technical teams Preferred Qualifications • Experience supporting perimeter security systems in the financial services industry • Direct experience with Palo Alto Firewalls, Proofpoint, or equivalent tools • Familiarity with cloud environments (AWS, Azure, or GCP) • Professional certifications such as CISSP, PCNSE, or AWS Solutions Architect – Associate • Experience working as part of a global cyber defense or infrastructure operations team

Requirements