G&A Partners names Jeff Williams as new CEO
HOUSTON, UNITED STATES — G&A Partners has appointed Jeff Williams as incoming Chief Executive Officer, succeeding co-founder John W. Allen after more than 30 years at the helm of the Houston-based HR outsourcing and professional employer organization, according to a press release.
The appointment follows Williams’ tenure as President and CEO of Aptia — a Marsh McLennan carveout — and his prior executive role at Paychex, where he oversaw a $1.5 billion P&L.
Allen exits after three decades building national PEO
G&A Partners, founded in 1995, operates with 850-plus HR professionals and serves more than 6,000 clients and 130,000 worksite employees across the U.S. Allen will remain on the board, maintain an ownership stake, and serve as senior advisor during the transition.
Over three decades, he built G&A from a Houston startup into one of the largest independent national PEO operators by client base.
“Building G&A Partners alongside our incredible employees, clients, and partners has been the honor of a lifetime. I’m proud that G&A has grown into an organization that positively impacts thousands of companies and hundreds of thousands of workers across the country,” said John W. Allen, co-founder and outgoing CEO of G&A Partners.
Williams brings PEO and benefits administration depth
Williams most recently served as President and CEO of Aptia, a benefits administration firm he helped transform into a standalone market leader following its carveout from Marsh McLennan.
At Paychex, he managed a $1.5 billion P&L and drove 17% compound annual growth in the mid-market Administrative Services Organization business.
His career also includes executive roles at Alight, ADP, and Aon across HCM, benefits, and professional services platforms.
“I’m honored to join G&A Partners at such an exciting moment in the company’s journey. John, Tony Grijalva, and the leadership team have built an extraordinary organization with an outstanding reputation,” said Jeff Williams, incoming CEO of G&A Partners.
The leadership change arrives as U.S. PEO and HR outsourcing demand continues to expand, driven by small and mid-size employers shifting benefits administration, compliance and payroll to third-party providers.
G&A’s focus on benefits administration and workforce solutions places it in the segment most exposed to that demand shift. Williams’ track record scaling Paychex’s mid-market ASO business and leading Aptia’s post-carveout transformation suggests G&A is positioned to accelerate growth in the outsourced HR market.
