September 2021
Windjammer Portfolio Company Hermetic Solutions Group Acquires FilConn, Inc.

Windjammer Capital (“Windjammer”) is pleased to announce that its portfolio company Hermetic Solutions Group (“HSG” or the “Company”) has acquired FilConn, Inc. (“FilConn”), a leading manufacturer of custom aerospace and military spec grade specialty connectors. Terms of the transaction were not disclosed.

Founded in 2003, FilConn specializes in precision high-reliability filtered, EMP suppression and custom configuration connectors for the mil/aero, medical, transit and energy sectors. It is the second acquisition in nine months for HSG and adds to its Specialty Interconnect Solutions platform established in December 2020 with the acquisition of Cristek Interconnects.

HSG’s portfolio of engineered components, microelectronic packages, interconnect and thermal management solutions provides systems engineers with a range of complementary products and know-how, enabling them to solve for the protection, preservation and enhancement of electronic signal generation and transmission under the harshest operating conditions.

“We are very excited to have FilConn join the HSG family of brands,” said Keith Barclay, President and CEO of HSG. “As an industry leader in highly engineered connector solutions for mission-critical applications, FilConn augments our specialty interconnect initiative and further enhances HSG’s core value proposition. We look forward to working together as the FilConn team continues to create value with innovative connector solutions for their customers.”

“FilConn is a strategic addition to HSG’s interconnect solutions offering and representative of the type of unique, differentiated and well-positioned franchise we seek to acquire,” added Craig Majernik, Managing Director at Windjammer, which acquired HSG in February 2019. “Our M&A strategy is focused on expanding HSG’s suite of highly engineered performance and protection solutions designed to ensure mission-critical electronic systems in aerospace and defense, medical and industrial applications function reliably in extreme environments.”  

For more information on HSG please visit its website at

Please contact Craig Majernik ( or Greg Bondick ( at Windjammer with any questions regarding the transaction.

About Windjammer

Windjammer Capital is a national private equity investment firm based in Newport Beach, CA and Waltham, MA that invests control equity in middle-market businesses and in partnership with management. Since its founding in 1990, Windjammer has managed over $2 billion of committed capital with respect to its control equity investment strategy, and since inception has completed over 60 platform investments and more than 160 strategic add-ons. The firm targets investments in companies that are leaders in attractive niche markets and share several of the following characteristics: significant and defensible market positions; differentiated products and services; strong management teams; scalable business models; identifiable growth opportunities; and consistent financial performance.