OT Security Engineer & Database Developer

Dragonfli Group is a cybersecurity and IT consulting firm providing services to federal agencies and Fortune 100 enterprises. Headquartered in Washington, DC, Dragonfli supports clients in securing mission-critical systems across on-site, hybrid, and fully remote environments.

We are seeking an Operational Technology (OT) Asset Visibility and Security Engineer and Database Developer with 8+ years of hands-on OT security experience in large enterprise IT environments. This technical contributor will play a critical role in applying asset visibility solutions to OT hardware and software asset management security efforts, directly supporting both OT operations and OT security initiatives.

The ideal candidate will have documented enterprise experience administering Forescout CounterAct, proven expertise with Armis Centrix, and advanced skills in Splunk use and knowledge object development. This role also requires database development and automation expertise to continue building and maintaining USPS’s proprietary OT asset management database system.

This role is 100% on-site in Merrifield, Virginia. An active Forescout Engineering Certification is required for this role.

Key Responsibilities

• Lead the application of asset visibility solutions to OT hardware/software asset management, including: Network access control (NAC), USB attached device control, Vulnerability management, Security event investigation support
• Serve as a Forescout CounterAct administrator and apply Forescout Engineering expertise in the USPS OT environment.
• Implement and maintain Armis Centrix for OT asset visibility and monitoring.
• Develop and optimize Splunk knowledge objects, dashboards, and searches to support OT security operations.
• Continue development and curation of USPS’s proprietary OT asset management database, leveraging it for automation and asset discovery.
• Provide Windows and Linux system administration support, including security hardening.
• Document workflows, prepare flowcharts, and maintain step-by-step technical action plans for OT cybersecurity operations.

Must-Have Requirements:

• Education: Accredited bachelor’s degree in Computer Science, Information Systems, or related field; or equivalent work experience.
• Experience: At least 8+ years of OT security experience in large enterprise IT environments.
• Proven success in applying asset visibility solutions to OT environments in support of both operations and security initiatives.
• Documented experience as a Forescout CounterAct administrator (Forescout Engineering certification required).
• Strong experience implementing and maintaining Armis Centrix solutions.
• Advanced skills in Splunk use with a focus on knowledge object development (searches, dashboards, alerts).
• Hands-on experience with Windows and Linux system administration.
• Expertise in database design, implementation, and maintenance for proprietary/enterprise systems.

Desired Requirements:

• Technical certifications such as CISSP, CISA, CISM, GIAC, RHCE, CPTE, or CEH.
• Strong oral and written communication skills.
• Ability to prepare and interpret technical flowcharts and diagrams.
• Experience building and maintaining schedules and step-by-step action plans.
• Strong organizational and interpersonal skills, with the ability to influence peers and stakeholders.

Core Technical Skills

• Operational Technology (OT) Security (8+ years)
• OT Asset Visibility Solutions
• OT Hardware & Software Asset Management
• Network Access Control (NAC)
• USB Device Control
• Vulnerability Management
• Security Event Investigation & Incident Response
• Windows System Administration
• Linux System Administration
• Database Design, Development, and Administration
• Database Automation & Integration

Tools & Platforms

• Forescout CounterAct (Administrator-level)
• Forescout Engineering Certification
• Armis Centrix
• Splunk (Search, Dashboards, Alerts, Knowledge Object Development)

• Insurance - health, dental, vision
• PTO & 11 Federal Holidays
• 401(k), employer match