OT Security Engineer (Hybrid/Remote)

Macro Pros has an immediate opening for an OT Cybersecurity Engineer to support the security of Operational Technology (OT) environments, including building automation, utilities, and other critical facilities systems. It's a long-term position assisting our client in Bethesda, Maryland. Interested candidates must currently live in metro Washington, D.C. and willing to work on-site in Bethesda 3 days a week.
Key Responsibilities:

• Assist with inventory and documentation of OT/ICS assets and networks.
• Help maintain OT network and data flow diagrams, including segmented zones.
• Support monitoring of OT network segments and systems for unusual or suspicious activity.
• Help triage OT-related security alerts and coordinate with cybersecurity and facilities teams.
• Assist with vulnerability tracking, patch/firmware planning, and basic hardening tasks for OT systems.
• Contribute to OT risk assessments, security documentation, and compliance activities (e.g., NIST-based controls).
• Work with facilities, biomedical/clinical engineering, and vendors to plan secure changes and maintenance.

Hands-on experience in the following areas:

• OT/controls or building/facility systems (e.g., BAS/BMS, HVAC controls, utilities, PLCs)
• IT/cybersecurity fundamentals (e.g., networking, firewalls, security monitoring, vulnerability management).
• Understanding of basic networking and security concepts (e.g., TCP/IP, segmentation, least privilege, logging).
• Strong documentation skills and ability to communicate clearly with technical and non-technical staff.

Preferred Qualifications:

• Exposure to OT or industrial systems (e.g., building automation, power/backup systems, lab facility controls).
• Familiarity with OT or industrial protocols (e.g., BACnet, Modbus) and/or security frameworks (e.g., NIST SP 800-82, NIST SP 800-53, CIS Controls).
• Entry-level certifications such as Security+, Network+, CySA+, or OT/ICS-related training/certificates.
• Experience with cyber-physical/OT security platforms (e.g., Nozomi, Dragos, Claroty).
• Experience with Federal security frameworks, including FedRAMP, FISMA, RMF, NIST CSF, and NIST SP 800-series policies.

Basic Qualifications

• Bachelor's degree in cybersecurity, computer science, engineering (mechanical, electrical, controls, systems), information technology, or a related field or an equivalent combination of education, technical training, and experience.

Work Environment:

• Must be willing to go onsite in Bethesda at least three days per week.
• Occasional off-hours work to support maintenance windows or incident response.
• Regular access to mechanical rooms, plants, labs, and clinical areas, following proper safety procedures and PPE requirements.

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