Human Resources Assistant

Subsidiary: Sully Miller Holding Co.


Sully-Miller Contracting Co., the Colas USA subsidiary that operates throughout Southern California, is a company with nearly 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  

Throughout Colas USA, we provide 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

Sully-Miller Contracting Co., and the rest of the Colas USA Family of Companies, is part of the Colas Group, the worldwide leader in transportation infrastructure construction and maintenance. For information on our international network visit


Job Summary


The Human Resources Assistant will use their analytical abilities to fulfill any and all tasks related to Human Resources including compliance, benefit administration, leave of absence processes, while acting as a liaison between management and the field. The Human Resources Assistant is responsible for providing assistance in the Human Resources Department through being the primary point of contact for any all divisions and employees in regard to HR matters in addition demonstrate creativity to boost morale within the organization through company events.

Main Responsibilities


  • Ensure employees are being dispatched by communication with union halls and Management (United Rock Products and Blue Diamond Materials)
  • Responsible for conducting union and non-union new employee orientation including background checks, scheduling drug screens, dissemination of safety, and benefits information (United Rock Products and Blue Diamond Materials)
  • Assist in recruitment efforts for the Company for vacant non-union and union positions (URP)
  • Assist Human Resources Department in carrying out various human resource programs and procedures for all company employees
  • Acts as the Subject Matter Expert (SME) for all databases utilized by the Company such as UNUM and Benefits Path
  • Acts as primary initiator in the completion of manual updates including but not limited to, pay increase, apprentice updates, terminations, W-4 changes, direct deposit updates, etc.
  • Ensure all documents pertaining to employees’ personnel files are scanned and indexed accordingly and within a timely manner
  • Responsible for the completion of EDDS forms
  • Maintain company training records in ColasWays
  • Track all leave of absences for all employees, union and non-union
  • Participate in Company benefits administration and annual open enrollment
  • *Coordinate company engagement events
  • Other duties as assigned

Education and Experience


  • Minimum of 1-year experience in Human Resources
  • Bachelor’s degree in Human Resources or related field (preferred)
  • Knowledge of basic HR principles, policies, practices and regulations
  • Proficient in Microsoft Office Suite, Teams, and Outlook
  • Previous experience with HRIS systems, preferably JD Edwards and Success Factors



  • Ability to be discreet with confidential information (required)
  • Ability to handle pressure and manage multiple projects with frequently changing priorities
  • Ability to work well with others
  • Excellent organizational and problem-solving skills
  • Excellent verbal and written communication skills
  • High accuracy and neatness in all work aspects
  • Self-motivated, with a strong work ethic and demonstrated initiative
  • Strong attention to detail
  • Team player with the ability to work alone for specific tasks
  • Must be able to work 100% in-office Monday-Friday

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

Please contact Colas Inc. at 973-290-9082 or send an email to

Nearest Major Market: Orange County
Nearest Secondary Market: Los Angeles