Cybersecurity Specialist 3 - Chantilly, VA

Cybersecurity Specialist 3 - Chantilly, VA M.C. Dean paid time off, tuition reimbursement, 401(k), retirement plan United States, Virginia, Chantilly May 11, 2026 Overview About M.C. Dean M.C. Dean is Building Intelligence. We design, build, operate, and maintain cyber-physical solutions for the nation's most mission-critical facilities, secure environments, complex infrastructure, and global enterprises. With over 9,000 employees, our capabilities span electrical, electronic security, telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers resilient, secure, and innovative power and technology solutions through engineering expertise and smart systems integration. Why Join Us? Our people are passionate about engineering innovation that improves lives and drives impactful change. Guided by our core values-agility, expertise, and trust-we foster a collaborative and forward-thinking work environment. At M.C. Dean, we are committed to building the next generation of technical leaders in electrical, engineering, and cybersecurity industries. We are seeking a Cybersecurity Specialist 3to join our Security and Electronic Systems (SES) business Unit. As part of (SES) Strategic Business Unit you will be part of a team that designs, engineers, integrates, operates and maintains electronic security services inclusive of intrusion detection, access control, biometric authentication, video surveillance, audio visual, it systems, perimeter defense and command and control systems for federal, local and commercial customers across high-growth markets. Responsibilities As part of a multidisciplinary team, you will be responsible for coordinating and implementing technical controls and configuration settings and will work in a team environment alongside other cybersecurity engineers and Risk Management Framework (RMF) analysts responsible for supporting Information System Security Engineering efforts. Working closely and supporting team members, vendors, and government customers Implementing DoD Security Technical Implementation Guides (STIGs) on traditional Information Technology (IT) and Operational Technology (OT) systems Assisting in the development and verification of documentation necessary to complete the DoD RMF assessment and authorization process Conducting

ICS/SCADA

system inventories following DoD guidance Conducting vulnerability scanning and document system vulnerabilities Supporting ISO standardization and Quality inspections Participating in continuous improvement of organizational cybersecurity posture

Qualifications Clearance/Citizen Type:

Applicants selected will be subject to a government security investigation and must meet eligibility requirements, including U.S. Citizenship, for access to classified information;

ACTIVE TS/SCI

Clearance with the ability to obtain a TS/SCI w/ Polygraph is

REQUIRED

Education:

3+ Years of Experience with a Master's Degree in Information Technology, Risk Management, Cybersecurity 5+ Years of Experience with a Bachelor's Degree in Information Technology, Risk Management, Cybersecurity 8+ Years of Experience with an Associate's Degree in Information Technology, Risk Management, Cybersecurity 10+ Years with a

High School Diploma Required Progressive Experience:

Working with industry and government agencies on the design of platforms and integrated systems Working on government and/commercial projects implementing cybersecurity requirements in a variety of industrial control systems (e.g., building management, electronic security, fire alarm/mass notification, electrical distribution, power management, etc.) Proficiency with ACAS and HBSS and mitigation strategies Developing policies and procedures to ensure information systems reliability and accessibility and to prevent and defend against unauthorized access to systems, networks, and data Assessment, mitigation, and closure of network vulnerabilities and vulnerability management eMASS Establishing, managing, and tracking of Plan of Action & Milestones (POA&M) Applying STIGs to servers, databases, applications, and other hardware Security Readiness Review (SRR) Tools (scripts and ACAS) Ability to identify, maintain, and troubleshoot control network components Excellent understanding of the DoD RMF lifecycle and

NIST 800-53

controls implementation Awareness of NIST Special Publication 800-82, Guide to Industrial Control Systems (ICS) Security and

UFC 4-010-06

Unified Facilities Criteria (UFC) Cybersecurity of Facility Working knowledge of operational control systems and implementing a variety of security assessment tools Working knowledge of other operational control systems Familiarity with DoDIN CCRI/CCORI and

CYBERCOM TASKORDS

Familiarity with various industry products One of the

Required Certifications:

CASP CE CISSP CISSP - ISSAP CISSP - ISSEP CSSLP CISA CISM GCED GCIH

Also:

Strong Oral, Written and Presentation Skills with the ability and experience communicating directly with Customers Demonstrated background working with multidisciplinary teams Demonstrated time management and organization skills to meet deadlines and quality objectives Strong MS Excel, Word, PowerPoint, AUTOCAD, Cameo and Visio Skills is a plus.

What we offer:

A collaborative team inspired by the way engineering and innovation enhance customer outcomes, improve lives, and change the world for the better. We are driven by our core values of agility, expertise, and trust. An opportunity to lead and build a business with the support of an industry-leading firm that has been in business for 75 years. Investment in your skills and expertise through a combination of professional and technical training programs, including leadership training and tuition reimbursement. Open and transparent communication with senior leadership as well as local office management. We offer an excellent benefits package including: A competitive salary Medical, dental, vision, life, and disability insurance Paid time off Tuition reimbursement 401k Retirement Plan Military Reserve pay offset Paid maternity leave

Abilities:

Exposure to computer screens for an extended period of time. Sitting for extended periods of time. Reach by extending hands or arms in any direction. Have finger dexterity in order to manipulate objects with fingers rather than whole hands or arms, for example, using a keyboard. Listen to and understand information and ideas presented through spoken words and sentences. Communicate information and ideas in speaking so others will understand. Read and understand information and ideas presented in writing. Apply general rules to specific problems to produce answers that make sense. Identify and understand the speech of another person.