The architecture, engineering, and construction (AEC) landscape is currently undergoing a significant wave of executive realignment. From boutique design firms to multinational conglomerates, industry leaders are navigating a complex market environment defined by rapid technological adoption, energy transition mandates, and the shifting needs of institutional clients. This report details the recent strategic appointments, organizational restructurings, and the passing of industry titans who helped define the modern built environment.
Strategic Leadership Appointments and Firm Realignment
Executive Appointments in Design and Engineering
The push for specialized expertise in regional markets remains a primary driver for leadership changes. Elizabeth Mahon, a veteran architect formerly of HDR, has joined Philadelphia-based SITIO architecture + urbanism as managing principal. Mahon, whose tenure at HDR was marked by the successful establishment and scaling of its Philadelphia architecture studio, brings a wealth of experience in high-profile urban design. Her appointment is expected to bolster SITIO’s competitive positioning in the Mid-Atlantic market.
In the engineering sector, Walter P Moore has promoted Melissa Shea to managing director of structural engineering for the Washington, D.C. office. A principal at the firm, Shea has carved out a niche in the delivery of highly complex healthcare and technology facilities—sectors that currently demand rigorous technical precision and sustainable design integration.
The Energy Transition Pivot
Perhaps the most notable shift in the energy infrastructure space is Nextpower’s appointment of David Hardy as chief business development officer. Hardy, who will operate out of the Greater Boston area for the California-based solar manufacturer, brings immense credibility to the role. His resume includes high-level leadership positions at GE Vernova, where he served as global chief commercial officer for the wind power business, and a term as CEO of Ørsted North America. By securing Hardy, Nextpower signals an aggressive intent to scale its operations, particularly as it supports major contractors like Bechtel and SOLVEnergy in large-scale renewable projects.
Scaling Construction Management
The Construction Management Association of America (CMAA) has announced that Kevin D. Watkins will assume the role of president and CEO on November 16. Watkins, currently the chief operating officer of the American Institute of Architects (AIA), brings extensive experience in managing large-scale membership organizations to the CMAA, which represents a critical segment of the construction industry.
Regional growth is also a priority for New Edge Contractors in Glen Burnie, Maryland. The firm has undergone a significant management shake-up, naming co-founders Mike Clay and John Wiegand as CEO and chief development officer, respectively. To round out the leadership team, they have recruited Terry Edmondson, a former Clark Construction Group vice president, as president, and Eric Tievy, formerly of Pillar Construction Inc., as executive vice president.
Chronology of Organizational Changes (Q3–Q4 2025)
The following timeline tracks the recent shifts in executive governance across the industry:
- September 22: Genesis AEC announces the passing of Stephen M. Hall, chief process engineer.
- October 4: Richard S. Weeks, former CEO and board chair of Weeks Marine, passes away in New Jersey.
- October 15: Schimenti Construction announces the promotion of James Harrison to president.
- October 20: STV elevates Iris Giboyeaux, Alexander Houseal, and Rafael Ruffo to senior vice president roles.
- November 1: Hourigan Construction formalizes the promotion of Michael Henley to president and Mark Hourigan Jr. to vice president of central Virginia.
- November 16: Kevin D. Watkins officially begins his tenure as president and CEO of the CMAA.
Supporting Data and Organizational Growth
STV’s Strategic Promotions
STV continues to strengthen its internal leadership pipeline by promoting three key executives to senior vice president. Iris Giboyeaux remains in New York City, where she oversees operations and strategy for the firm’s North region. Alexander Houseal, based in Reading, Pa., continues to lead transportation engineering efforts across the Pennsylvania and New Jersey corridors. Rafael Ruffo, also New York-based, has been tasked with leading integrated design and construction delivery, a role that emphasizes the industry’s shift toward more collaborative project delivery methods.
Hourigan Construction’s Generational Transition
At Richmond’s Hourigan Construction, the leadership transition reflects a balance between continuity and new energy. Following the legacy of Mark Hourigan Sr., who founded the firm in 1993, the company has elevated Michael Henley to president and Mark Hourigan Jr. to vice president for the central Virginia region. Both men are partners in the firm, ensuring that the company’s foundational culture remains intact while adapting to the demands of a modern construction market.
Official Responses and Memorials
Honoring a Marine Industry Titan
The industry mourns the loss of Richard S. Weeks, 73, who died on October 4. As a fourth-generation leader of Weeks Marine Inc., his contributions to the maritime construction sector were transformative. Under his guidance, the Cranford, N.J.-based company evolved from a regional outfit into an international powerhouse providing specialized services in dredging, tunneling, and coastal restoration.
The firm’s trajectory under Weeks culminated in its acquisition by Kiewit Corp. in 2023, where it now operates as a separately branded, wholly owned subsidiary. At the time of the 2022 fiscal report, the company employed 1,500 people and generated nearly $1 billion in annual revenue, a testament to Weeks’ stewardship.
Investing in the Future: The Stephen M. Hall Fund
Genesis AEC, currently ranked at No. 327 on the ENR Top 500 Design Firms list with $71.2 million in 2025 revenue, is honoring the late Stephen M. Hall, 75, through a significant philanthropic initiative. Hall, who served as the firm’s chief process engineer, was a pillar of the life sciences and biopharmaceutical sectors.
In a statement, the firm announced the creation of the "Stephen M. Hall Fund." With an initial contribution of $25,000, the fund is designed to support the next generation of pharmaceutical manufacturing leaders. The company has expressed "plans for future growth" regarding the endowment, indicating that Hall’s influence on the firm’s technical standards will persist long after his passing.
Implications for the AEC Market
The current wave of personnel changes suggests three major trends in the industry:
- Consolidation of Specialized Expertise: The movement of leaders like David Hardy (Nextpower) and Melissa Shea (Walter P Moore) into high-level positions underscores the value placed on experts who can bridge the gap between technical engineering and high-stakes project delivery. Clients are no longer just buying services; they are buying the expertise of individuals who have navigated the complexities of large-scale infrastructure and institutional facilities.
- The Rise of Integrated Delivery: With STV’s promotion of Rafael Ruffo to lead integrated design and construction delivery, it is clear that firms are prioritizing the elimination of silos between design and construction. This trend is further evidenced by the promotions at Hourigan and the expansion of management at New Edge Contractors, both of which emphasize cohesive, end-to-end management styles.
- Succession Planning as a Competitive Advantage: The smooth transitions at Hourigan Construction and the strategic appointments at various other firms indicate that successful companies are prioritizing structured succession planning. By grooming internal partners and recruiting experienced talent from outside the organization, firms are mitigating the risks associated with the industry-wide "brain drain" as senior professionals reach retirement age.
As the industry moves into 2026, the focus will likely remain on these leadership dynamics. Companies that successfully retain institutional knowledge while pivoting to embrace the sustainability requirements of the next decade will be the ones to define the future of the built environment. Whether through the professional advancement of the next generation of presidents and principals or the creation of memorial funds that invest in future talent, the AEC sector is proving to be as much about people as it is about the structures they design and build.
