Human Resources Intern - Summer 2027

Sully-Miller Contracting Co.; Brea (CA); On-site; USD 30,000 - 42,000; Part time

Job summary

Sully-Miller Contracting Co. is seeking a Human Resources Intern in Southern California to assist the HR team with daily administrative tasks, recruitment, onboarding, and maintaining employee records.

The role offers hands-on experience in talent acquisition, employee engagement, and compliance initiatives while developing practical HR skills in a dynamic construction environment.

Qualifications

• Must be actively working towards a college degree.
• Strong organizational and multitasking skills.
• Excellent verbal and written communication.
• Proficient in Microsoft Word, Excel, and PowerPoint.
• Ability to work independently and as part of a team.

Responsibilities

• Assist with onboarding of new employees.
• Support monthly insurance billing processes.
• Help plan and coordinate company events.
• Provide administrative support to HR department.
• Organize documents and files.

Skills

Multitask efficiently

Teamwork

Attention to detail

Organization

Verbal communication

Written communication

Initiative

Analytical thinking

Education

Actively pursuing a college degree

Tools

Microsoft Word

Excel

PowerPoint

Job description

Sully-Miller Contracting Co., the Colas USA subsidiary that operates throughout Southern California, is a company with over 100 years in the construction industry. Since 1923, Sully-Miller has become one of the premier construction contractors in Southern California, building much of the region’s infrastructure including airports, seaports, rail and intermodal, military/federal, roads, highways, and specialty projects. To learn more about Sully-Miller Contracting Co. visit www.sully-miller.com.

The Colas USA Family of Companies provides competitive pay, outstanding benefits, career advancement opportunities, professional education, and extensive training for every employee. We pride ourselves on upholding the highest standards of safety, environmental conservation, and ethical conduct as we strive to grow our infrastructure products and services through empowering and developing our people, fostering innovation, utilizing new technology, and maximizing vertical integration at all levels of the company’s value chain. To learn more about the Colas USA Family of Companies, please visit www.colasusa.com.

Compensation

$26 per hour

Job Summary

The Human Resources Intern will support the HR department by assisting with daily administrative tasks, recruitment processes, employee onboarding, and maintaining employee records. This internship provides a hands‑on experience in various HR functions, including talent acquisition, employee engagement, and compliance initiatives. The ideal candidate is organized, communicative, and eager to learn about human resource management practices while contributing to a positive workplace environment.

Main Responsibilities

• Assist with the onboarding process for new employees
• Manage and oversee the monthly insurance billing process
• Support the planning and coordination of company events
• Provide administrative and clerical support to the department
• Scan, index, and organize documents and files into OnBase
• Contribute to special projects as assigned
• Perform other duties as assigned

Education And/or Work Experience Requirements

Must be actively working towards a college degree

Skills

• Ability to multitask efficiently and be flexible
• Ability to work independently and as a team
• Basic math skills with the ability to calculate and analyze data
• Excellent attention to detail
• Excellent organizational skills
• Excellent verbal and written communication
• Must have the ability to work well with all levels of the organization
• Proficient in Microsoft Word, Excel, and PowerPoint
• Strong tendency to take initiative

Physical Requirements

• Ability to utilize hands and fingers in order to type and carry reports should the need require
• Ability to stand, walk, and reach with arms and hands throughout the workday should the need arise
• Ability to climb, balance, stoop, kneel, and crouch should the need arise
• Ability to sit for a long period of time, possibly more than 90% of the workday
• Ability to see clearly or with assistance via necessary correction

Colas Inc. And Its Subsidiaries Are An Equal Opportunity Employer. For Details On The Specifics Of This Commitment, Please Click Here To View The EEO Document. If You Are An Individual With a Disability And Require a Reasonable Accommodation To

• to meet the requirements of the role in which you are applying
• complete any part of the application process
• access or use the online application process and need an alternative method for applying