Corporate governance
10 directors, 9 of whom are independent under NYSE listing standards. All directors stand for election annually.
| Director | Independent | Since | Audit | Compensation | Nominating | Safety & Env. |
|---|---|---|---|---|---|---|
| Rowan T. KesslerChair of the Board | No | 2018 | ||||
| Gwendolyn AparicioLead Independent Director | Yes | 2015 | M | C | ||
| Nathaniel Okonkwo | Yes | 2019 | M | C | ||
| Beatrix Vandermolen | Yes | 2021 | C | |||
| Hollis Trang | Yes | 2016 | C | M | ||
| Emeka Balogun | Yes | 2022 | M | M | ||
| Ilse Rautenbach | Yes | 2023 | M | M | ||
| Franklin Ashworth-Doyle | Yes | 2013 | M | M | ||
| Maribel Castellanos | Yes | 2020 | M | M | ||
| Yusuf Demirci | Yes | 2025 | M | M |
C = chair · M = member · committee charters
Chair, President and Chief Executive Officer, KAT Fabricators
Chair of the BoardDirector since 2018Not independent
Mr. Kessler has served as Chief Executive Officer since 2018 and as Chair since 2021. His two decades of operating experience across the Company’s aggregates and cement businesses inform the Board’s review of capital projects and acquisition strategy.
Retired Chief Financial Officer, Allegheny Regional Utilities
Lead Independent DirectorDirector since 2015Independent
Ms. Aparicio served as Chief Financial Officer of a regulated multi-state utility from 2009 until her retirement in 2019, with responsibility for a $14 billion capital programme. She brings capital-intensive infrastructure finance, rate-case and audit committee experience to the Board, and has served as Lead Independent Director since 2021.
Other public boards Cardinal Freight Systems, Inc.
Former Chief Operating Officer, Meridian Engineering Group
Director since 2019Independent
Mr. Okonkwo led operations for a national heavy-civil engineering and construction firm from 2012 to 2021, overseeing more than 400 active projects. He contributes direct customer-side perspective on infrastructure demand and construction risk, and chairs the Safety, Health and Environment Committee.
Retired Assurance Partner, Halloran Peck LLP
Director since 2021Independent
Ms. Vandermolen spent 27 years in public accounting, latterly as the assurance partner responsible for industrial and natural-resource clients in the firm’s Mid-Atlantic practice. She chairs the Audit Committee and has been designated an audit committee financial expert.
Other public boards Ironwood Packaging Corporation
Chief Executive Officer, Brightwater Industrial Partners
Director since 2016Independent
Ms. Trang leads a private industrial holding company with operations in water infrastructure and specialty chemicals. Her experience compensating operating executives across cyclical businesses supports her role as chair of the Compensation and Human Capital Committee.
Professor of Civil and Environmental Engineering, Lehigh University
Director since 2022Independent
Dr. Balogun researches low-carbon cementitious materials and has authored more than 90 peer-reviewed papers on supplementary cementitious materials and concrete durability. He advises the Board on decarbonisation technology and product qualification pathways.
Former President, International Division, Cordero Building Products
Director since 2023Independent
Ms. Rautenbach led a $3 billion international building-products division across fifteen countries before retiring in 2022. She brings commercial, distribution and cross-border integration experience to the Board.
Managing Partner, Ashworth Land & Mineral Advisors
Director since 2013Independent
Mr. Ashworth-Doyle advises institutional owners on mineral reserves, land valuation and permitting. His long tenure and reserve-appraisal expertise support the Board’s oversight of long-lived asset acquisitions and reclamation obligations.
Executive Vice President and General Counsel, Sentinel Rail Holdings
Director since 2020Independent
Ms. Castellanos serves as chief legal officer of a Class II railroad holding company, with responsibility for regulatory affairs, litigation and governance. She brings transportation regulation and public-company governance experience to the Board.
Former Chief Financial Officer, Caldwell Infrastructure Partners
Director since 2025Independent
Mr. Demirci served as Chief Financial Officer of a publicly traded infrastructure engineering group from 2016 to 2024 and previously led its capital markets function. He brings project-level construction economics and public-company reporting experience to the Audit Committee.
Director qualifications, the Board’s leadership structure, its role in risk oversight and director compensation are described in the annual proxy statement. Independence is determined by the Board under the NYSE listing standards and the Company’s Corporate Governance Guidelines.