Senior Automation Software PLC Engineer - Critical Infrastructure

As a master system integrator (MSI), Smart Tech Contracting excels in streamlining complex building automation system (BAS) and technology integrations, offering a comprehensive turnkey package that includes DDC, PLC, and SCADA solutions.

We offer systems design, graphical standards development, central plant optimization (CPO), enterprise-level energy and operational monitoring, and robust alarming solutions. Our expertise in hyperscale and colocation data center integrations ensures seamless, efficient operations vital in today's data-driven world.

As the Senior Automation Software PLC Engineer – Critical Infrastructure, you'll architect high-availability PLC systems, lead Level 2–5 commissioning, and push the boundaries of automation under live pressure. This is a hands-on, high-impact engineering role based in Atlanta, GA, where precision, speed, and resilience define success.

Position Title : Senior Automation Software PLC Engineer – Critical Infrastructure

Position Location : Must relocate to or live in Atlanta, GA area

SALARY

Smart Tech Contracting recognizes salary ranges from job boards do not necessarily reflect our pay ranges. In many instances we out-compete those ranges for well-qualified candidates.

JOB SUMMARY

The Senior Automation Software PLC Engineer – Critical Infrastructure owns the complete PLC software lifecycle for hyperscale and colocation datacenter campuses ranging from 10MW to 200MW+. You will architect, program, and lead level 2 / 3 / 4 / 5 commissioning of highavailability PLC solutions that integrate mechanical, electrical, and IT / OT subsystemsensuring TierIII / IV reliability while meeting aggressive speedtomarket schedules.

The Senior Automation Software PLC Engineer – Critical Infrastructure will serve as the PLC subjectmatter expert (and secondary SME on SCADA development and SCADA integration) to ensure seamless handoffs, tag mapping, and site testing. You will Lead development of PLC logic, modular function blocks, state machines, and faulttolerant control strategies across multiple projects.

The Senior Automation Software PLC Engineer – Critical Infrastructure will coordinate closely with field electricians, startup & commissioning technicians, and the SCADA Engineer to validate endtoend data flow, alarms, and historian points. You will provide onsite SME support during Level2throughLevel5 Integrated Systems Testing (IST), troubleshooting complex field issues undergo live pressure. You will Implement robust codemanagement, simulation, and cybersecurity practices aligned with ISA / IEC62443 and owner standards.

The Senior Automation Software PLC Engineer – Critical Infrastructure will be self-directed on day-to-day work and independently performs most responsibilities. Will lead teams and projects or tasks of complex scope and broader programs. Will coordinate activities of other personnel. Assists in the development of policies and procedures.

This person will communicate and operate in line with organizational goals and values, as well as departmental objectives.

ESSENTIAL FUNCTIONS

PLC Software Development and Testing (65%)

• Design, program, and debug PLC logic for chilledwater plants, HVAC, CRAH / CRACs, fan wall systems, and liquid cooling solutions
• Build reusable library objects and automated test harnesses; perform Factory Acceptance Testing (FAT) and Site Acceptance Testing (SAT)
• Execute Level2 & 3 panel checkout and Level4 functional testing; generate corrective patches during Level5 IST.

Integration and Commissioning Support (20%)

Standards and Continuous Improvement (10%)

Mentorship and Reporting (5%)

Completion of Assigned Tasks and Deliverables on Time and on Budget

Performs Other Related Duties as Assigned

Requirements

POSITION REQUIREMENTS (ADVANCED LEVEL FOR ALL THE FOLLOWING)

PHYSICAL DEMANDS

The following physical demands must be met by the employee to successfully perform the essential functions of this job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this job, the employee is

TRAVEL / RELOCATION REQUIREMENTS

EDUCATION / EXPERIENCE REQUIREMENTS

OR

PLUS

Benefits

Smart Tech Contracting offers a very competitive benefits package; highlights include

Smart Tech Contracting is an EEO / Affirmative Action Employer and participates in the E-Verify program with the Department of Homeland Security. We encourage diversity in our workforce.

Are you ready to challenge yourself and redefine standards in the AEC industry? Apply now and join our award-winning team!

NOTICE TO THIRD PARTY AGENCIES :

STC does not accept unsolicited resumes from recruiters, employment agencies, or other staffing services. Unsolicited resumes include any resume or hiring document sent to STC in the absence of a signed Service Agreement where STC has expressly requested recruitment / staffing services specific to the position at hand. Any unsolicited resumes, including those submitted to hiring managers or other business leaders, will become the property of STC and STC will have the right to hire that candidate without reservation – no fee or other compensation will be owed or paid to the recruiter, employment agency, or other staffing service.

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