Office Manager

Subsidiary: Sully Miller Holding Co.


United Rock Products is one of the companies that operates within Sully-Miller Contracting Co., the Colas USA subsidiary that operates throughout Southern California. We are part of Sully-Miller Companies consisting of Sully-Miller Contracting Co., Blue Diamond Materials and United Rock Products. Each company supports the other. United Rock provides the aggregate, Blue Diamond Materials provides the hot and warm mix asphalt manufacturing, and Sully-Miller Contracting executes the projects. Mining of construction aggregates at United Rock Products in the San Gabriel Valley has taken place since 1916. Our top-rated 300-acre site is located in Irwindale, California, just 25 miles east of Los Angeles. Virgin aggregate material is processed into sand and gravel through cutting-edge crushing and screening operations. To learn more about United Rock Products 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

United Rock Products, 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


As a fundamental part of the URP Management team, the office manager performs administrative, accounting and office support activities. Duties to include: purchasing (creating PO’s, ordering parts/supplies, receiving parts, coding invoices, reconciling p-card purchasing), payroll (entering data, validating timesheets, correcting errors, and working with employees, foreman and payroll department), contractor / service management (scheduling, payments). Production and inventory reporting to various agencies and corporate office. The Office Manager also provides the URP management team with local HR support for employees on payroll, vacation and other requests. Extensive software skills, Internet research abilities and strong communication skills are required.

Main Responsibilities


  • Prepare reports, presentations, letters, memos, analysis, etc. as directed
  • Manages office supply inventories
  • Manage payroll and equipment hours process and work with foreman and equipment department to ensure equipment usage hours are captured.
  • Orders parts and supplies for operations as directed by foreman and managers
  • Code and receive invoices
  • Schedules services (trash, portolets etc) and contractors (plumbers, landscapers) as requested by managers
  • Manages Uniform Program for employees  
  • Provides training to foreman on payroll and equipment input
  • Manage purchase order process
  • Reconciles p card expenses
  • Manages tool and boot allowance reimbursement programs
  • Provides HR related services such as attendance tracking, vacation requests, sick days etc
  • Assists management team with onsite meetings and training
  • Act as liaison for business travel, hotel and off-site meetings arrangements as required
  • Oversee company copier equipment including maintenance, location moves and payments
  • Learn drone operations and assist with monthly inventories as needed



  • 5 years of office administration/office management experience
  • Excellent written and verbal communication skills
  • Proficient in Word, Excel, and PowerPoint
  • Good organization abilities
  • Ability to multitask
  • Strong Customer Service skills required
  • Strong computer skills with preference given to employees with JWS knowledge preferred
  • Willingness to learn and use web-based systems such as MobileSales for quoting
  • Must have a valid driver’s license and be able to drive company vehicle
  • Understands MSHA and CALOSHA regulations
  • Must have a strong, team-oriented work ethic with strong focus on safety and environmental compliance
  • Ability to understand and follow Company Handbook and Safety Policies
  • Ability to work well and communicate with others
  • Must be able to follow oral and written plans and directions


Colas Inc. and its subsidiaries (United Rock Products) are an Equal Opportunity Employer. For details on the specifics of this commitment, please click here to view the EEO document. If you need an accommodation to access the information provided on this website, please contact Colas Inc. 973-290-9082 or send an email to

Nearest Major Market: Los Angeles