Security Manager

At MPC, we’re committed to being a great place to work – one that welcomes new ideas, encourages diverse perspectives, develops our people, and fosters a collaborative team environment. WHY JOIN US Join Marathon’s Galveston Bay Refinery and play a critical leadership role in protecting people, operations, and assets. This position offers a seasoned leader the opportunity to shape security strategy at one of the nation’s key energy facilities and make a visible difference in a dynamic industrial environment. This role offers meaningful responsibility, leadership growth, and the chance to help safeguard essential operations. POSITION SUMMARY The Marathon Galveston Bay Refinery (GBR) has an opening for a Security Manager to lead the Security Department. The individual will be responsible for supervising union, salaried and contract security personnel, overseeing site‑wide security programs and plans, regulatory compliance, investigative activities, and workplace violence prevention policies. The role will support and ensure the protection of refinery operations through the development, implementation, and monitoring of security strategies, risk assessments, and response plans, ensuring compliance with applicable federal, state, and industry regulations. KEY RESPONSIBILITIES Establishes security and protection strategies, priorities, and critical tasks including procedures, training, equipment, visitor and access controls, contractor vetting, security and emergency communications and information sharing. Continuously monitors effectiveness of security plans and operations for improvements. Oversees policies, including workplace violence prevention policies, standards, guidelines and procedures engaging business unit management to ensure concerns are adequately addressed. Directs training programs to maintain compliance with U.S. Federal and state regulations and company standards. Gathers and assesses information related to potential security threats and develops appropriate preventive strategies within area of assignment. Leads investigative teams, conducts complex Code of Conduct investigations, and prepares for legal proceedings to which the company may be a party. Leads ongoing risk assessments, criminal investigations, and on‑site audits to identify exposures, threats and vulnerabilities. Identifies likelihood and consequence of such events. Formulates and institutes risk mitigation measures ensuring compliance with governmental regulations for petroleum, maritime, and transportation industries. Coordinates efforts with internal and external resources to ensure restoration of critical systems and the proper support to all parties in the event of a security related event. Serves as a recognized expert in the security regulatory compliance programs within area of assignment and coordinates with local law enforcement. Manages site drone resources in support of security and refinery needs. EDUCATION AND EXPERIENCE Minimum Education and Experience: Undergraduate degree in criminal justice, law enforcement, security, or related discipline is required. (Education must be obtained/completed prior to start date) Ten (10) or more years of law enforcement, military, or security‑related field is required. A valid driver's license is required. Preferred Requirements: Detailed knowledge and experience implementing NIMS Incident Command System (able to train/fill/advise multiple positions) preferred. As an energy industry leader, our career opportunities fuel personal and professional growth. LOCATION Texas City, Texas EMPLOYMENT INFORMATION Employee Group: Full time Employee Subgroup: Regular EEO STATEMENT Marathon Petroleum Company LP is an Equal Opportunity Employer and gives consideration for employment to qualified applicants without discrimination on the basis of race, color, religion, creed, sex, gender (including pregnancy, childbirth, breastfeeding or related medical conditions), sexual orientation, gender identity, gender expression, reproductive health decision‑making, age, mental or physical disability, medical condition or AIDS/HIV status, ancestry, national origin, genetic information, military, veteran status, marital status, citizenship or any other status protected by applicable federal, state, or local laws. If you would like more information about your EEO rights as an applicant, click here . If you need a reasonable accommodation for any part of the application process at Marathon Petroleum LP, please contact our Human Resources Department at View email address on click.appcast.io. Please specify the reasonable accommodation you are requesting, along with the job posting number in which you may be interested. A Human Resources representative will review your request and contact you to discuss a reasonable accommodation. Marathon Petroleum offers a total rewards program which includes, but is not limited to, access to health, vision, and dental insurance, paid time off, 401k matching program, paid parental leave, and educational reimbursement. Detailed benefit information is available at The hired candidate will also be eligible for a discretionary company‑sponsored annual bonus program. Equal Opportunity Employer: Veteran / Disability We will consider all qualified Applicants for employment, including those with arrest or conviction records, in a manner consistent with the requirements of applicable state and local laws. In reviewing criminal history in connection with a conditional offer of employment, Marathon will consider the key responsibilities of the role. #J-18808-Ljbffr